External Tooth SEMS screws provide greater torsional resistance than internal tooth lock washers. Phillips Pan External Sems machine screws essentially have a pre-assembled lock washer beneath the head of the screw which is free-spinning which saves time.
Screws & Bolts,Machine Screws
750 Pieces #10-24x3/8in External Tooth Sems Phillips Pan Head Machine Screws Zinc, 750PK
Specifications of 750 Pieces #10-24x3/8in External Tooth Sems Phillips Pan Head Machine Screws Zinc, 750PK | |
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Instock | instock |