Description: SEMS screws (or SEM screws) are machine screws with lock washers pre-attached to save users assembly time. They combine two separate parts into one pre-assembled, low cost fastener.
Type: sems screw
Materials: Steel , stainless steel 18-8,410
Surface treatment: zinc plated, black oxide
Head Type: pan head, hex head, hex washer head
Washer Type: split lock washer, spring lock washer, external tooth lock washer, internal tooth lock washer, double washers
Standard: ASME B18.13
Certificate：Material Chemical Certificate, Inspection Report
About us
Shanghai ScrewTool Industrial is a subsidiary of Jiaxing Victor Screw Company, we serve the market of end-user customers , supplying economic fastener solutions to industry customers.
Address:
Office: #1409, No.26, Lane 777, Guangfulin Road, Songjiang District, Shanghai, China 201600
Factory: No.1, Guan-He Road, Haitou Town, Lianyungang, China