SEMS bolts (pre-assembled screw and washer combinations) with captive spring or flat washer that cannot fall off — cuts assembly time and prevents washer loss on production lines. Self-tapping or machine thread, zinc plated, per DIN 7980/7981 assemblies. ISO 9001:2015 certified factory · OEM/ODM supported · Bulk MOQ 500 pcs.
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Sems bolts combine a machine screw with a permanently attached washer, pre-assembled at the factory — no fumbling with loose washers on the assembly line, faster installation and captive hardware that cannot drop into your product. Custom combinations of thread size, head style and washer type on request.
Need a quotation? Send us your specification - MOQ from 1,000 pcs, lead time 7-15 days, ISO 9001:2015 certified with EN 10204 3.1 material certificates.
Carriage Bolts · Double End Studs · Eye Bolts · Flange Bolts · Hex Head Bolts · Socket Head Cap Screws · Square Head Bolts · Structural Bolts · T-Head Bolts · U-Bolts
