{"id":15975,"date":"2025-12-01T14:40:28","date_gmt":"2025-12-01T20:40:28","guid":{"rendered":"https:\/\/blog.misumiusa.com\/?page_id=15975"},"modified":"2025-12-04T11:36:16","modified_gmt":"2025-12-04T17:36:16","slug":"threads-per-inch-chart","status":"publish","type":"page","link":"https:\/\/us.misumi-ec.com\/blog\/threads-per-inch-chart\/","title":{"rendered":"Threads Per Inch (TPI) Chart"},"content":{"rendered":"\n<p>In the United States, most standard fasteners follow a predictable set of thread counts based on diameter and series, but the numbers can still be easy to mix up when you\u2019re working across different sizes. This guide provides a clear TPI table for common US bolt dimensions so you can verify thread counts quickly and avoid mismatched parts during assembly or repair.<\/p>\n\n\n\n<meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <style>\n        .thread-table-container {\n            font-family: Arial, sans-serif;\n            max-width: 100%;\n            overflow-x: auto;\n            margin: 0;\n            padding: 0;\n        }\n\n        .thread-table {\n            border-collapse: collapse;\n            width: 100%;\n            background-color: white;\n            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);\n        }\n\n        .thread-table thead {\n            background-color: #000000;\n            color: white;\n        }\n\n        .thread-table th {\n            padding: 12px 16px;\n            text-align: left;\n            font-weight: 600;\n            border: 1px solid #ddd;\n        }\n\n        .thread-table td {\n            padding: 10px 16px;\n            border: 1px solid #ddd;\n            transition: background-color 0.3s ease;\n        }\n\n        .thread-table tbody tr {\n            background-color: white;\n        }\n\n        .thread-table tbody tr:nth-child(even) {\n            background-color: #f8f8f8;\n        }\n\n        .thread-table tbody tr:hover {\n            background-color: #FFD700;\n            cursor: pointer;\n        }\n\n        .thread-table .size-column {\n            font-weight: 600;\n            color: #0066CC;\n        }\n\n        .thread-table .tpi-column {\n            text-align: center;\n        }\n\n        @media (max-width: 768px) {\n            .thread-table th,\n            .thread-table td {\n                padding: 8px 12px;\n                font-size: 14px;\n            }\n        }\n    <\/style>\n\n\n    <div class=\"thread-table-container\">\n        <table class=\"thread-table\">\n            <thead>\n                <tr>\n                    <th>Bolt Size<\/th>\n                    <th class=\"tpi-column\">Coarse Thread (UNC)<\/th>\n                    <th class=\"tpi-column\">Fine Thread (UNF)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td class=\"size-column\">#0000<\/td>\n                    <td class=\"tpi-column\">&#8211;<\/td>\n                    <td class=\"tpi-column\">160<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#000<\/td>\n                    <td class=\"tpi-column\">&#8211;<\/td>\n                    <td class=\"tpi-column\">120<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#00<\/td>\n                    <td class=\"tpi-column\">&#8211;<\/td>\n                    <td class=\"tpi-column\">90<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#0<\/td>\n                    <td class=\"tpi-column\">80<\/td>\n                    <td class=\"tpi-column\">80<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#1<\/td>\n                    <td class=\"tpi-column\">64<\/td>\n                    <td class=\"tpi-column\">72<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#2<\/td>\n                    <td class=\"tpi-column\">56<\/td>\n                    <td class=\"tpi-column\">64<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#3<\/td>\n                    <td class=\"tpi-column\">48<\/td>\n                    <td class=\"tpi-column\">56<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#4<\/td>\n                    <td class=\"tpi-column\">40<\/td>\n                    <td class=\"tpi-column\">48<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#5<\/td>\n                    <td class=\"tpi-column\">40<\/td>\n                    <td class=\"tpi-column\">44<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#6<\/td>\n                    <td class=\"tpi-column\">32<\/td>\n                    <td class=\"tpi-column\">40<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#8<\/td>\n                    <td class=\"tpi-column\">32<\/td>\n                    <td class=\"tpi-column\">36<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#10<\/td>\n                    <td class=\"tpi-column\">24<\/td>\n                    <td class=\"tpi-column\">32<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">#12<\/td>\n                    <td class=\"tpi-column\">24<\/td>\n                    <td class=\"tpi-column\">28<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1\/4&#8243;<\/td>\n                    <td class=\"tpi-column\">20<\/td>\n                    <td class=\"tpi-column\">28<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">5\/16&#8243;<\/td>\n                    <td class=\"tpi-column\">18<\/td>\n                    <td class=\"tpi-column\">24<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">3\/8&#8243;<\/td>\n                    <td class=\"tpi-column\">16<\/td>\n                    <td class=\"tpi-column\">24<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">7\/16&#8243;<\/td>\n                    <td class=\"tpi-column\">14<\/td>\n                    <td class=\"tpi-column\">20<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1\/2&#8243;<\/td>\n                    <td class=\"tpi-column\">13<\/td>\n                    <td class=\"tpi-column\">20<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">9\/16&#8243;<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                    <td class=\"tpi-column\">18<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">5\/8&#8243;<\/td>\n                    <td class=\"tpi-column\">11<\/td>\n                    <td class=\"tpi-column\">18<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">3\/4&#8243;<\/td>\n                    <td class=\"tpi-column\">10<\/td>\n                    <td class=\"tpi-column\">16<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">7\/8&#8243;<\/td>\n                    <td class=\"tpi-column\">9<\/td>\n                    <td class=\"tpi-column\">14<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1&#8243;<\/td>\n                    <td class=\"tpi-column\">8<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1-1\/8&#8243;<\/td>\n                    <td class=\"tpi-column\">7<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1-1\/4&#8243;<\/td>\n                    <td class=\"tpi-column\">7<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1-3\/8&#8243;<\/td>\n                    <td class=\"tpi-column\">6<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1-1\/2&#8243;<\/td>\n                    <td class=\"tpi-column\">6<\/td>\n                    <td class=\"tpi-column\">12<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">1-3\/4&#8243;<\/td>\n                    <td class=\"tpi-column\">5<\/td>\n                    <td class=\"tpi-column\">&#8211;<\/td>\n                <\/tr>\n                <tr>\n                    <td class=\"size-column\">2&#8243;<\/td>\n                    <td class=\"tpi-column\">4.5<\/td>\n                    <td class=\"tpi-column\">&#8211;<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n\n\n<p><\/p>\n\n\n\n<p><a href=\"https:\/\/us.misumi-ec.com\/\" title=\"\">MISUMI USA<\/a> carries a wide range of industrial manufacturing components &#8211; including nuts, and <a href=\"https:\/\/us.misumi-ec.com\/vona2\/mech_screw\/M3301000000\/\" title=\"\">bolts<\/a>&#8211; for your next project or machine fix. If you have any questions about measurement or sizing, feel free to <a href=\"https:\/\/us.misumi-ec.com\/service\/info\/help-center\/product-support.html\" title=\"\">connect with our product experts, and engineers<\/a>. Also, if you are looking for more insights be sure to check out our other blog articles, including: <a href=\"https:\/\/us.misumi-ec.com\/blog\/pilot-hole-sizes-wood-screws\/\" title=\"\">Pilot Hole Sizes<\/a>, <a href=\"https:\/\/us.misumi-ec.com\/blog\/wood-screw-sizes-table\/\" title=\"\">Wood Screw Diameter Table<\/a>, <a href=\"https:\/\/us.misumi-ec.com\/blog\/screw-threads-size-chart\/\" title=\"\">External Screw Threads Size Chart<\/a>, and more.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Author: <a href=\"https:\/\/us.misumi-ec.com\/blog\/author\/sbredemann\/\" title=\"\">Scott Bredemann<\/a> | Updated: 12\/4\/2025<\/p>\n\n\n\n<p class=\"has-small-font-size\"><strong>Disclaimer<\/strong>:<br>The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers\u2019 or manufacturers\u2019 deliverables within MISUMI\u2019s network. Buyers are responsible for specifying their part requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the United States, most standard fasteners follow a predictable set of thread counts based on diameter and series, but the numbers can still be easy to mix up when you\u2019re working across different sizes. This guide provides a clear TPI table for common US bolt dimensions so you can verify thread counts quickly and avoid mismatched parts during assembly [&hellip;]<\/p>\n","protected":false},"author":70,"featured_media":15993,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/15975"}],"collection":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/comments?post=15975"}],"version-history":[{"count":4,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/15975\/revisions"}],"predecessor-version":[{"id":15992,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/15975\/revisions\/15992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/media\/15993"}],"wp:attachment":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/media?parent=15975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}