{"product_id":"3-8-16-serrated-hex-flange-locknuts-steel-black-oxide","title":"3\/8\"-16 Serrated Hex Flange Locknuts \/ Steel \/ Black Oxide","description":"\u003cdiv style=\"font:400 15px\/1.65 -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#111827;max-width:52em;\"\u003e\n\u003cp style=\"margin:0 0 18px;font-size:16px;\"\u003e3\/8\"-16 flange nut in Low Carbon Steel, black oxide finish.\u003c\/p\u003e\n\u003cul style=\"margin:0 0 4px;padding-left:1.1em;\"\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eSERRATED FLANGE\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003eserrations under the flange bite the surface and resist backing off under vibration; they will mark a finished face\u003c\/li\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eFLANGE NUT\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003ean integral washer face spreads clamp load and removes a separate washer from the assembly\u003c\/li\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eALL METAL — NO TEMPERATURE LIMIT\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003ethe locking action is mechanical deformation, not a plastic insert, so it holds at temperatures that would destroy a nylon nut and survives repeated reuse\u003c\/li\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eCARBON STEEL\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003estrong and inexpensive, but it depends entirely on its plating for corrosion protection\u003c\/li\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eBLACK OXIDE\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003ea conversion coating that adds almost no dimension, so thread fit is unchanged; it is a mild rust inhibitor when oiled, not a weather coating\u003c\/li\u003e\n\u003cli style=\"margin:0 0 11px;\"\u003e\n\u003cspan style=\"font-weight:700;color:#0f4c5c;letter-spacing:.03em;font-size:13px;\"\u003eCOARSE THREAD (UNC)\u003c\/span\u003e\u003cspan style=\"color:#6b7280;\"\u003e — \u003c\/span\u003ethe default inch thread — faster to run down, more tolerant of dirt, damage and plating build-up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"font:600 15px\/1.3 -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#111827;margin:26px 0 10px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:280px;border-top:2px solid #0f4c5c;\"\u003e\n\u003ctr style=\"\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eThread size\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003e3\/8\"-16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9fafb;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eThread\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003eCoarse (UNC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eMaterial\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003eLow Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9fafb;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eFinish\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003eBlack Oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eStandard\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003eASME B18.2.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3 style=\"font:600 15px\/1.3 -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#111827;margin:26px 0 10px;\"\u003eDrilling \u0026amp; driving reference\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:280px;border-top:2px solid #0f4c5c;\"\u003e\n\u003ctr style=\"\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eClearance hole, close fit\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003e25\/64\" (.3906\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9fafb;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;font-weight:600;color:#111827;padding:9px 14px;border-bottom:1px solid #e5e7eb;white-space:nowrap;font-size:14px;\"\u003eClearance hole, normal fit\u003c\/th\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #e5e7eb;color:#111827;font-size:14px;font-variant-numeric:tabular-nums;\"\u003e13\/32\" (.4062\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cfigcaption style=\"font-size:12px;color:#6b7280;padding:8px 14px 0;\"\u003eTap drill at approximately 75% thread engagement. Clearance holes per ASME B18.2.8 \/ ISO 273. Wrench and key sizes per ASME B18.2.1 and B18.3. Figures are reference values — confirm against your own drawing before machining.\u003c\/figcaption\u003e\n\u003c\/div\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,000 pcs)","offer_id":53541981749540,"sku":"37NRB-1000","price":148.13,"currency_code":"USD","in_stock":true},{"title":"Package (100 pcs)","offer_id":53541981782308,"sku":"37NRB-100","price":56.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/NRB_35f8cf53-a08f-48e5-8f52-6718d7f2f723.png?v=1777572521","url":"https:\/\/www.ecomfasteners.com\/products\/3-8-16-serrated-hex-flange-locknuts-steel-black-oxide","provider":"Ecom Fasteners","version":"1.0","type":"link"}