{"title":"5\/16\"-18 SEMS Screws","description":"\u003cp\u003e5\/16\"-18 SEMS Screws in all available lengths, grades, materials, and finishes. 6 products in stock. Use the filters to narrow by grade, material, finish, and length. Orders before 2:00 PM ET ship same day.\u003c\/p\u003e","products":[{"product_id":"5-16-18-x-1-sems-screws-external-tooth-washer-unslotted-hex-washer-head-steel-zinc","title":"5\/16\"-18 x 1\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc","description":"\u003cp\u003e5\/16\"-18 x 1\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHex Washer Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal Hex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 TPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn Request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.208 - 0.230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003ca href=\"https:\/\/ecomfastenerstech.s3.us-west-1.amazonaws.com\/Machinehexhds.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDownload Spec Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,250 pcs)","offer_id":53542224527652,"sku":"3116EW-1250","price":1228.6,"currency_code":"USD","in_stock":true},{"title":"Package (125 pcs)","offer_id":53542224560420,"sku":"3116EW-125","price":471.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/EW_d3a268dc-fbb0-46d7-9d7f-a5ec66a473fc.png?v=1777573086"},{"product_id":"5-16-18-x-1-2-sems-screws-external-tooth-washer-unslotted-hex-washer-head-steel-zinc","title":"5\/16\"-18 x 1\/2\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc","description":"\u003cp\u003e5\/16\"-18 x 1\/2\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHex Washer Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal Hex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 TPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn Request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.208 - 0.230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003ca href=\"https:\/\/ecomfastenerstech.s3.us-west-1.amazonaws.com\/Machinehexhds.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDownload Spec Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,000 pcs)","offer_id":53542231671076,"sku":"3108EW-1000","price":602.03,"currency_code":"USD","in_stock":true},{"title":"Package (100 pcs)","offer_id":53542231703844,"sku":"3108EW-100","price":231.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/EW_a431a753-a7fc-4a97-b631-0751228f19cc.png?v=1777573105"},{"product_id":"5-16-18-x-3-4-sems-screws-external-tooth-washer-unslotted-hex-washer-head-steel-zinc","title":"5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc","description":"\u003cp\u003e5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Unslotted \/ Hex Washer Head \/ Steel \/ Zinc\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHex Washer Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal Hex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 TPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn Request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.208 - 0.230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003ca href=\"https:\/\/ecomfastenerstech.s3.us-west-1.amazonaws.com\/Machinehexhds.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDownload Spec Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,000 pcs)","offer_id":53542263423268,"sku":"3112EW-1000","price":309.13,"currency_code":"USD","in_stock":true},{"title":"Package (100 pcs)","offer_id":53542263456036,"sku":"3112EW-100","price":118.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/EW_62422b6b-b1db-4219-bc5f-e628262e9488.png?v=1777573199"},{"product_id":"5-16-18-x-3-4-sems-screws-external-tooth-washer-phillips-pan-head-steel-zinc","title":"5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Phillips \/ Pan Head \/ Steel \/ Zinc","description":"\u003cp\u003e5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Phillips \/ Pan Head \/ Steel \/ Zinc\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePan Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePhillips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 TPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn Request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.594 - 0.615\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.203 - 0.218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003ca href=\"https:\/\/ecomfastenerstech.s3.us-west-1.amazonaws.com\/Machinepancombo.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDownload Spec Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,500 pcs)","offer_id":53542263554340,"sku":"3112EPP-1500","price":301.64,"currency_code":"USD","in_stock":true},{"title":"Package (150 pcs)","offer_id":53542263587108,"sku":"3112EPP-150","price":115.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/EPP_7c1c3ebc-4e6d-48cf-aa1d-3f8223fef3bf.png?v=1777573200"},{"product_id":"5-16-18-x-3-4-sems-screws-external-tooth-washer-slotted-hex-washer-head-steel-zinc","title":"5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Slotted \/ Hex Washer Head \/ Steel \/ Zinc","description":"\u003cp\u003e5\/16\"-18 x 3\/4\" SEMS Screws \/ External Tooth Washer \/ Slotted \/ Hex Washer Head \/ Steel \/ Zinc\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHex Washer Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlotted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 TPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Pitch Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn Request\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.208 - 0.230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003ca href=\"https:\/\/ecomfastenerstech.s3.us-west-1.amazonaws.com\/Machinehexhds.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDownload Spec Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Ecom Fasteners","offers":[{"title":"Bulk Box (1,500 pcs)","offer_id":53542263816484,"sku":"3112ESW-1500","price":803.0,"currency_code":"USD","in_stock":true},{"title":"Package (150 pcs)","offer_id":53542263849252,"sku":"3112ESW-150","price":308.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/7139\/5364\/files\/ESW_a6873252-9a97-4a34-80e0-61edd51732ec.png?v=1777573200"}],"url":"https:\/\/www.ecomfasteners.com\/collections\/5-16-18-sems-screws.oembed","provider":"Ecom Fasteners","version":"1.0","type":"link"}