{"id":35369,"date":"2026-09-05T15:58:04","date_gmt":"2026-09-05T07:58:04","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=35369"},"modified":"2026-09-05T15:58:44","modified_gmt":"2026-09-05T07:58:44","slug":"pcb-hole-size-tolerance-pth-npth-press-fit-guide","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/","title":{"rendered":"PCB Hole Size Tolerance: PTH, NPTH, and Press-Fit Guide"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#What_PCB_Hole_Size_Tolerance_Actually_Controls\" >What PCB Hole Size Tolerance Actually Controls<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#Drill_Tool_Size_vs_Finished_Hole_Size\" >Drill Tool Size vs Finished Hole Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#How_PTH_and_NPTH_Hole_Tolerances_Differ\" >How PTH and NPTH Hole Tolerances Differ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#Why_Press-Fit_Holes_Need_a_Functional_Window\" >Why Press-Fit Holes Need a Functional Window<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#How_Via_Tolerance_Interacts_with_Annular_Ring\" >How Via Tolerance Interacts with Annular Ring<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#Manufacturing_Variables_Behind_Finished-Hole_Variation\" >Manufacturing Variables Behind Finished-Hole Variation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#How_Finished_PCB_Hole_Size_Is_Measured\" >How Finished PCB Hole Size Is Measured<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#Why_Over-Tight_Tolerances_Increase_Cost_and_Risk\" >Why Over-Tight Tolerances Increase Cost and Risk<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#How_to_Build_a_Clear_Hole_and_Slot_Table\" >How to Build a Clear Hole and Slot Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#Supplier_Evidence_and_Nonconformance_Review\" >Supplier Evidence and Nonconformance Review<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#PCB_Hole_Tolerance_Decision_Checklist\" >PCB Hole Tolerance Decision Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#What_to_Send_for_EBest_Circuit_Review_and_Quotation\" >What to Send for EBest Circuit Review and Quotation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/09\/pcb-hole-size-tolerance-pth-npth-press-fit-guide\/#PCB_Hole_Size_Tolerance_FAQ\" >PCB Hole Size Tolerance FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div><style>\n#post-35369 h1._title, #post-35369 .entry h2, #post-35369 .entry h3 { word-break: normal; overflow-wrap: anywhere; }\n.ebest-inline-cta{margin:2em 0;padding:24px;border-radius:14px;background:#eaf5fb;border-left:5px solid #1478a6}.ebest-inline-cta__title{margin:0 0 8px;font-size:1.25rem;font-weight:700;color:#17394a}.ebest-inline-cta__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}.ebest-inline-cta__button{flex:1 1 240px;min-width:0;max-width:100%;box-sizing:border-box;padding:12px 16px;border-radius:7px;background:#1478a6;color:#fff!important;text-align:center;text-decoration:none;font-weight:700}.ebest-final-cta{margin:2em 0 0;padding:26px;border-radius:14px;background:#123a4b;color:#fff}.ebest-final-cta a{color:#fff;font-weight:700}\n<\/style>\n<figure style=\"max-width:100%;margin:1.5em 0;overflow-x:hidden\"><img fetchpriority=\"high\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/09\/pcb-hole-size-tolerance-inspection.jpg\" alt=\"PCB quality engineer measuring finished hole size with optical equipment and pin gauges\" width=\"1672\" height=\"941\" loading=\"eager\" decoding=\"async\" style=\"display:block;width:100%;max-width:100%;height:auto;margin:0 auto\"><figcaption>Finished-hole tolerance must match the hole function, plating condition and agreed measurement method.<\/figcaption><\/figure>\n<p><strong>PCB hole size tolerance defines the acceptable range of the finished hole, not simply the diameter of the drill tool.<\/strong> Plated through holes (PTH), non-plated holes (NPTH), vias and press-fit holes serve different functions, so one blanket tolerance rarely produces the best balance of fit, reliability, yield and cost.<\/p>\n<p>The drawing should state whether each dimension is finished or drilled, whether plating is present, what feature mates with the hole, and how acceptance will be measured. Without those details, a supplier may meet a numerical callout while missing the assembly requirement.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_PCB_Hole_Size_Tolerance_Actually_Controls\"><\/span>What PCB Hole Size Tolerance Actually Controls<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>A tolerance controls the allowed upper and lower finished diameter for a defined hole class.<\/strong> It protects lead insertion, fastener fit, press-fit retention, plating reliability or via geometry. The tolerance should be derived from that function.<\/p>\n<p>A nominal value alone is incomplete. A  drawing needs a plus\/minus or limit range, the plated status and any positional or geometric requirement that affects fit.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Drill_Tool_Size_vs_Finished_Hole_Size\"><\/span>Drill Tool Size vs Finished Hole Size<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Mechanical drill diameter is a manufacturing input; finished hole diameter is the inspected output.<\/strong> For a PTH, copper deposition reduces the open diameter after drilling. Cleaning, desmear, plating distribution and measurement method affect the final result.<\/p>\n<p>NPTH features normally do not receive barrel copper, but routing\/drilling variation, material behavior and finishing still matter. Do not copy a finished size into the drill file and assume the fabricator will interpret the required allowance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_PTH_and_NPTH_Hole_Tolerances_Differ\"><\/span>How PTH and NPTH Hole Tolerances Differ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div style=\"overflow-x:auto\">\n<table>\n<tbody>\n<tr>\n<td><strong>Hole class<\/strong><\/td>\n<td><strong>Primary function<\/strong><\/td>\n<td><strong>Tolerance evidence<\/strong><\/td>\n<\/tr>\n<tr>\n<td>PTH component hole<\/td>\n<td>Lead insertion plus reliable plated connection<\/td>\n<td>Finished diameter, plating and lead envelope<\/td>\n<\/tr>\n<tr>\n<td>Via<\/td>\n<td>Electrical interconnection<\/td>\n<td>Finished hole, aspect ratio, annular ring and plating<\/td>\n<\/tr>\n<tr>\n<td>NPTH mounting hole<\/td>\n<td>Mechanical clearance or location<\/td>\n<td>Finished diameter, position and mating hardware<\/td>\n<\/tr>\n<tr>\n<td>Press-fit hole<\/td>\n<td>Controlled interference with compliant pin<\/td>\n<td>Connector specification, finished diameter and plating<\/td>\n<\/tr>\n<tr>\n<td>Slot<\/td>\n<td>Tab, lead or mechanical feature<\/td>\n<td>Finished width\/length, radii and plated status<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Keep PTH and NPTH features separate in the drill data and drawing. Ambiguous mixed tables are a common source of quoting and production errors.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Press-Fit_Holes_Need_a_Functional_Window\"><\/span>Why Press-Fit Holes Need a Functional Window<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Press-fit performance depends on the relationship between the finished plated hole and the connector pin system.<\/strong> A hole that is too small may raise insertion force or damage the barrel; one that is too large may reduce retention or electrical contact.<\/p>\n<p>Use the connector manufacturer&#8217;s approved finished-hole window and identify the pin part number. Align it with plating, board thickness, copper construction, insertion tooling and inspection. Our <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/08\/press-fit-pcb-assembly-process-design-quality-checks\/\">press-fit PCB assembly guide<\/a> explains the broader process.<\/p>\n<div class=\"ebest-inline-cta\">\n<p class=\"ebest-inline-cta__title\">Need a hole table checked before PCB release?<\/p>\n<p>Send the drill files, fabrication drawing, connector data, stackup and finished-hole requirements. EBest Circuit can flag ambiguous plated status and tolerance conflicts.<\/p>\n<div class=\"ebest-inline-cta__actions\"><a class=\"ebest-inline-cta__button\" href=\"https:\/\/www.bestpcbs.com\/pcb-quote\/\">Request a Hole-Tolerance DFM Review<\/a><\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_Via_Tolerance_Interacts_with_Annular_Ring\"><\/span>How Via Tolerance Interacts with Annular Ring<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Finished-hole variation and positional variation both consume the copper land around a via.<\/strong> A larger finished diameter can reduce remaining annular ring even when the hole center is unchanged; registration shift can reduce it on one side.<\/p>\n<p>Review pad diameter, finished hole, plating allowance, layer registration and breakout criteria together. See the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/07\/pcb-annular-ring\/\">annular ring guide<\/a> and <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/07\/pcb-aspect-ratio\/\">PCB aspect-ratio guide<\/a>.<\/p>\n<figure style=\"max-width:100%;margin:1.5em 0;overflow-x:hidden\"><img src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/09\/pth-npth-press-fit-hole-comparison.jpg\" alt=\"Cross-section samples comparing plated non-plated and press-fit PCB holes\" width=\"1672\" height=\"941\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;max-width:100%;height:auto;margin:0 auto\"><figcaption>PTH, NPTH and press-fit holes need different acceptance logic even when nominal diameters look similar.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Manufacturing_Variables_Behind_Finished-Hole_Variation\"><\/span>Manufacturing Variables Behind Finished-Hole Variation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Finished size is influenced by more than tool diameter.<\/strong> Drill wear, runout, panel-stack setup, laminate movement, desmear, electroless copper, electrolytic plating and local current distribution can change the result.<\/p>\n<ul>\n<li>Tool selection and wear influence the drilled opening.<\/li>\n<li>Material and stack height affect drilling behavior.<\/li>\n<li>Cleaning\/desmear prepares the wall before metallization.<\/li>\n<li>Barrel copper reduces the open diameter of plated holes.<\/li>\n<li>Plating distribution can vary across a panel.<\/li>\n<li>Final finish or secondary operations may alter particular features.<\/li>\n<\/ul>\n<p>These variables explain why capability must be confirmed for the actual stackup and hole class, not copied from a generic tolerance table.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Finished_PCB_Hole_Size_Is_Measured\"><\/span>How Finished PCB Hole Size Is Measured<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>The measurement method must suit the hole and acceptance purpose.<\/strong> Pin gauges can quickly verify functional pass\/fail windows; optical systems can measure diameter and location; cross-sections can show plating and wall condition.<\/p>\n<p>Agree whether the reported result is a minimum diameter, maximum diameter, two-axis optical value or gauge acceptance. Sampling location and lot coverage also matter when plating varies across the panel.<\/p>\n<p>Diameter tolerance must also be separated from positional tolerance. A hole can have the correct opening but sit too far from its datum, pad or mating feature. Conversely, a correctly located center can still fail a functional gauge because the finished opening is undersize. For slots, measure width, end radii, length and position according to the drawing rather than reducing the feature to one diameter.<\/p>\n<p>Measurement timing should be clear. A result taken before plating does not prove the final PTH opening, while an inspection after an unapproved secondary operation may no longer represent the released process. Keep equipment calibration, sample identity and revision traceable to the production lot.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Over-Tight_Tolerances_Increase_Cost_and_Risk\"><\/span>Why Over-Tight Tolerances Increase Cost and Risk<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>A tolerance tighter than the product needs can force special tooling, sorting, additional coupons, lower panel utilization or extra process controls.<\/strong> It may also reduce supplier options without improving assembly.<\/p>\n<p>Classify holes by function. Apply tight limits only to features that require them, such as qualified press-fit systems or precision mechanical interfaces. Use the fabricator&#8217;s standard capability where it satisfies ordinary via or lead-clearance needs.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Build_a_Clear_Hole_and_Slot_Table\"><\/span>How to Build a Clear Hole and Slot Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>Assign a unique class to each functional hole family.<\/li>\n<li>State PTH, NPTH or other required treatment.<\/li>\n<li>Specify finished size and tolerance or limit range.<\/li>\n<li>Identify quantity and associated drill-tool reference.<\/li>\n<li>Separate round holes from plated\/non-plated slots.<\/li>\n<li>Call out press-fit part numbers and approved windows.<\/li>\n<li>State positional requirements where mechanical fit depends on them.<\/li>\n<li>Keep Gerber\/ODB++, NC drill and drawing revisions synchronized.<\/li>\n<\/ol>\n<p>For base size selection, review the protected <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/pcb-drill-sizes\/\">standard PCB drill sizes guide<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Supplier_Evidence_and_Nonconformance_Review\"><\/span>Supplier Evidence and Nonconformance Review<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Acceptance evidence should prove the required finished condition.<\/strong> Depending on risk, that can include first-piece measurements, gauge results, cross-sections, plating records, coordinate reports and lot traceability.<\/p>\n<p>If a hole is out of tolerance, determine scope and function before disposition. Do not enlarge, replate or accept a critical feature without confirming its effect on annular ring, barrel copper, fit and reliability.<\/p>\n<div class=\"ebest-inline-cta\">\n<p class=\"ebest-inline-cta__title\">Comparing two PCB quotes with different hole assumptions?<\/p>\n<p>Send both interpretations with the board files and mating-part data. We can help normalize finished-size, plating and inspection requirements.<\/p>\n<div class=\"ebest-inline-cta__actions\"><a class=\"ebest-inline-cta__button\" href=\"https:\/\/www.bestpcbs.com\/pcb-quote\/\">Send the RFQ Package<\/a><\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"PCB_Hole_Tolerance_Decision_Checklist\"><\/span>PCB Hole Tolerance Decision Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Is the value a drill size or finished size?<\/li>\n<li>Is the feature plated, non-plated or press-fit?<\/li>\n<li>What part, lead, pin or fastener must fit?<\/li>\n<li>Does annular ring remain acceptable at worst case?<\/li>\n<li>Are position and diameter tolerances separated?<\/li>\n<li>Is the measurement method defined?<\/li>\n<li>Are only functional holes tightly controlled?<\/li>\n<li>Do all released files use the same revision?<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_to_Send_for_EBest_Circuit_Review_and_Quotation\"><\/span>What to Send for EBest Circuit Review and Quotation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Send Gerber or ODB++, NC drill data, fabrication drawing, stackup, materials, copper requirements, hole\/slot table, connector or hardware specifications, quantities, assembly needs, inspection level and target delivery.<\/strong><\/p>\n<p>EBest Circuit can review data consistency and return questions before quotation. Specific tolerance capability must be confirmed against the selected construction and approved manufacturing route.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"PCB_Hole_Size_Tolerance_FAQ\"><\/span>PCB Hole Size Tolerance FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>What is PCB hole size tolerance?<\/h3>\n<p>It is the allowed range around a defined finished or drilled hole dimension.<\/p>\n<h3>Is drill size the same as finished hole size?<\/h3>\n<p>No. Plating and other processing change the final opening, especially for PTH features.<\/p>\n<h3>Do PTH and NPTH holes use the same tolerance?<\/h3>\n<p>Not automatically. Their processes and functions differ, so they should be specified separately.<\/p>\n<h3>Why are press-fit holes more sensitive?<\/h3>\n<p>The finished plated diameter directly affects insertion force, retention and contact behavior.<\/p>\n<h3>How is a finished hole measured?<\/h3>\n<p>Common methods include calibrated pin gauges, optical measurement and cross-section analysis.<\/p>\n<h3>Does plating reduce hole diameter?<\/h3>\n<p>Yes. Barrel copper occupies part of the drilled opening, so fabrication compensates from the finished requirement.<\/p>\n<h3>Can a larger hole reduce annular ring?<\/h3>\n<p>Yes. Increasing the opening leaves less copper land around the hole.<\/p>\n<h3>Should every hole receive a tight tolerance?<\/h3>\n<p>No. Tighten only features whose fit or reliability requires it.<\/p>\n<h3>What causes hole-size variation?<\/h3>\n<p>Tool condition, drilling setup, material behavior, cleaning, plating and measurement all contribute.<\/p>\n<h3>What files prevent tolerance mistakes?<\/h3>\n<p>Provide synchronized artwork, NC drill files, a finished-hole table, stackup and mating-part specifications.<\/p>\n<div class=\"ebest-final-cta\">\n<p><strong>Make every critical hole measurable and manufacturable.<\/strong><\/p>\n<p>Send your PCB files, hole table, connector data, quantities and target delivery.<\/p>\n<div class=\"ebest-inline-cta__actions\"><a class=\"ebest-inline-cta__button\" href=\"mailto:sales@bestpcbs.com\">Email the Engineering Team<\/a><a class=\"ebest-inline-cta__button\" href=\"https:\/\/www.bestpcbs.com\/pcb-quote\/\">Request a PCB Quote<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Learn how PCB hole size tolerance differs for PTH, NPTH, vias and press-fit holes, including finished size, plating allowance, measurement, DFM and RFQ data.<\/p>\n","protected":false},"author":32827,"featured_media":35367,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[174],"tags":[8210,8211,5771],"class_list":["post-35369","post","type-post","status-publish","format-standard","hentry","category-bestpcb","tag-pcb-design-guidelines","tag-pcb-drilling","tag-pcb-quality-control"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Learn how PCB hole size tolerance differs for PTH, NPTH, vias and press-fit holes, including finished size, plating allowance, measurement, DFM and 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