(25) 3/8-16 X 7/8” Square Head Machine Bolt Screw Zinc 9/16” Head 3/8” X 7/8”
25 pieces 3/8-16 X 7/8 square head machine bolt steel zinc plated 9/16” square head
3/8″-16 x 7/8″ Coarse Thread Socket Set Screw Knurled Cup Pt Black Oxide
3/8″-16 x 7/8″ Coarse Thread Socket Set Screw Cup Pt Black Oxide
Thread Pitch Type: Coarse. Fastener Type: Socket Set Screw Cup Point. Socket set screws, or grub screws, are commonly used to secure pulleys to shafts, socket set screws are generally headless and rest flush with or below the surface of the application.