[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-569194-105":53,"doc-detail-569194-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","tap-drill-chart-tapped-hole-aluminum-brass-plastic-microform-precision","Tap Drill Chart - Tapped Hole Aluminum, Brass, Plastic - Microform Precision","","Tap drill chart for microform precision tapped holes across aluminum, brass, and plastic. The table maps screw thread sizes to major and minor diameters, providing matching drill sizes and decimal equivalents. It supports quick selection of drill diameter for fine threads, from 1/4\"-28 and 1/4\"-20 through 3-56 and smaller inch and fractional thread series. Useful for precision machining and drilling setup planning.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/tap-drill-chart-tapped-hole-aluminum-brass-plastic-microform-precision/569194/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/tap-drill-chart-tapped-hole-aluminum-brass-plastic-microform-precision/569194.png","ImageObject",442,249,{"name":88,"@type":89},"Aran","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-27","2026-10-13",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",9,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"What does the tap drill chart provide for tapped holes in aluminum, brass, and plastic?","Question",{"text":109,"@type":110},"It lists screw thread sizes alongside major and minor diameters, then supplies the recommended drill size with a decimal equivalent for each entry.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"How do I use the chart to choose a drill size?",{"text":114,"@type":110},"Find your screw thread size in the table and use the drill size and the decimal equivalent from the corresponding row.",{"name":116,"@type":107,"acceptedAnswer":117},"Which thread types are covered in the chart?",{"text":118,"@type":110},"The chart includes common fractional inch thread sizes as well as standardized numeric thread designations such as 12-32, 10-32, 6-40, 5-44, 4-48, and 3-56, each paired with drill and diameter values.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},569194,1792017139,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":79,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":73},137455076865,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Tap Drill Chart: Tapped Hole Aluminum, Brass, Plastic – Microform Precision  \n| Screw Thread Size | Major Diameter | Minor\u003Cbr>Diameter | Drill Size | Decimal Equivalent |\n| --- | --- | --- | --- | --- |\n| 1/4\"-28 | 0.25\" | 0.2062\" | 3 | 0.213\" |\n| 1/4\"-20 | 0.25\" | 0.1887\" | 7 | 0.201\" |\n| 12-32 | 0.216\" | 0.1777\" | 13 | 0.185\" |\n| 12-28 | 0.216\" | 0.1722\" | 14 | 0.182\" |\n| 12-24 | 0.216\" | 0.1649\" | 16 | 0.177\" |\n| 10-32 | 0.19\" | 0.1517\" | 21 | 0.159\" |\n| 10-24 | 0.19\" | 0.1389\" | 25 | 0.1495\" |\n| 8-32 | 0.164\" | 0.1257\" | 29 | 0.136\" |\n| 8-36 | 0.164\" | 0.1299\" | 29 | 0.136\" |\n| 6-40 | 0.138\" | 0.1073\" | 33 | 0.113\" |\n| 6-32 | 0.138\" | 0.0997\" | 36 | 0.1065\" |\n| 5-44 | 0.125\" | 0.0971\" | 37 | 0.104\" |\n| 5-40 | 0.125\" | 0.0943\" | 38 | 0.1015\" |\n| 4-48 | 0.112\" | 0.0864\" | 42 | 0.0935\" |\n| 4-40 | 0.112\" | 0.0813\" | 43 | 0.089\" |\n| 3-56 | 0.099\" | 0.0771\" | 45 | 0.082\" |\n\n\n| 3-48 | 0.099\" | 0.0734\" | 47 | 0.0785\" |\n| --- | --- | --- | --- | --- |\n| 2-56 | 0.086\" | 0.0641\" | 50 | 0.07\" |\n| 2-64 | 0.086\" | 0.0668\" | 50 | 0.07\" |\n| 1-64 | 0.073\" | 0.0538\" | 53 | 0.0595\" |\n| 1-72 | 0.073\" | 0.056\" | 53 | 0.0595\" |\n| 3/4\"-16 | 0.75\" | 0.6733\" | 11/16\" | 0.6875\" |\n| 3/8\"-32 | 0.375\" | 0.3367\" | 11/32\" | 0.3438\" |\n| 7/8\"-14 | 0.875\" | 0.7874\" | 13/16\" | 0.8125\" |\n| 1-12 | 1\" | 0.8978\" | 15/16\" | 0.9375\" |\n| 1/2\"-28 | 0.5\" | 0.4562\" | 15/32\" | 0.4688\" |\n| 5/8\"-11 | 0.625\" | 0.5135\" | 17/32\" | 0.5312\" |\n| 3/4\"-10 | 0.75\" | 0.6273\" | 21/32\" | 0.6562\" |\n| 7/16\"-20 | 0.4375\" | 0.3762\" | 25/64\" | 0.3906\" |\n| 1/2\"-13 | 0.5\" | 0.4056\" | 27/64\" | 0.4219\" |\n| 1/2\"-20 | 0.5\" | 0.4387\" | 29/64\" | 0.4531\" |\n| 0-80 | 0.06\" | 0.0447\" | 3/64\" | 0.0469\" |\n| 9/16\"-12 | 0.5625\" | 0.4603\" | 31/64\" | 0.4844\" |\n| 9/16\"-18 | 0.5625\" | 0.4943\" | 33/64\" | 0.5156\" |\n\n\n| 9/16\"-24 | 0.5625\" | 0.5114\" | 33/64\" | 0.5156\" |\n| --- | --- | --- | --- | --- |\n| 5/8\"-18 | 0.625\" | 0.5568\" | 37/64\" | 0.5781\" |\n| 5/8\"-24 | 0.625\" | 0.5739\" | 37/64\" | 0.5781\" |\n| 11/16\"-24 | 0.6875\" | 0.6364\" | 41/64\" | 0.6406\" |\n| 3/4\"-20 | 0.75\" | 0.6887\" | 45/64\" | 0.7031\" |\n| 13/16\"-20 | 0.8125\" | 0.7512\" | 49/64\" | 0.7656\" |\n| 7/8\"-9 | 0.875\" | 0.7387\" | 49/64\" | 0.7656\" |\n| 3/8\"-16 | 0.375\" | 0.2983\" | 5/16\" | 0.3125\" |\n| 7/8\"-20 | 0.875\" | 0.8137\" | 53/64\" | 0.8281\" |\n| 15/16\"-20 | 0.9375\" | 0.8762\" | 57/64\" | 0.8906\" |\n| 1-20 | 1\" | 0.9387\" | 61/64\" | 0.9531\" |\n| 1/4\"-32 | 0.25\" | 0.2117\" | 7/32\" | 0.2188\" |\n| 5/16\"-32 | 0.3125\" | 0.2742\" | 9/32\" | 0.2812\" |\n| 5/16\"-18 | 0.3125\" | 0.2443\" | F | 0.257\" |\n| 5/16\"-24 | 0.3125\" | 0.2614\" | I | 0.272\" |\n| 3/8\"-24 | 0.375\" | 0.3239\" | Q | 0.332\" |\n| 7/16\"-14 | 0.4375\" | 0.3499\" | U | 0.368\" |\n| 7/16\"-28 | 0.4375\" | 0.3937\" | Y | 0.404\" |\n|  |  |  |  |  |\n\n\n| [http://www.mform.com/tap-](http://www.mform.com/tap-) |  |  |  |  |\n| --- | --- | --- | --- | --- |\n| drill-chart/ |  |  |  |  |","cbCaigaD5Db6hU4L","https://ap.wps.com/l/cbCaigaD5Db6hU4L","pdf",98685,"English","# Tap drill size reference\n## Thread sizes and corresponding diameters\n## Drill sizes and decimal equivalents","[{\"question\":\"What does the tap drill chart provide for tapped holes in aluminum, brass, and plastic?\",\"answer\":\"It lists screw thread sizes alongside major and minor diameters, then supplies the recommended drill size with a decimal equivalent for each entry.\"},{\"question\":\"How do I use the chart to choose a drill size?\",\"answer\":\"Find your screw thread size in the table and use the drill size and the decimal equivalent from the corresponding row.\"},{\"question\":\"Which thread types are covered in the chart?\",\"answer\":\"The chart includes common fractional inch thread sizes as well as standardized numeric thread designations such as 12-32, 10-32, 6-40, 5-44, 4-48, and 3-56, each paired with drill and diameter values.\"}]","Tap Drill Chart - Tapped Hole Aluminum, Brass, Plastic - Microform Precision | PDF",1791874474]