sems screw philips round head withexternal toothed lock washer
SEMS SCREW
sems screw philips round head with external toothed lock washer
Material: carbon steel, stainless steel, alloy steel, copper, aluminum and other materials Hardness: specified according to the customer's drawing. Surface treatment:black, black zinc, nickel plating, galvanizing, etc., according to customer needs.
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