CHISEL COLDH- 6 .498 HVY DUTY 1972

Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket.3/8"-16 Socket Head Cap Screw, Plain Steel, 1-1/2 in Length, 100 PK A hex key is required to tighten or loosen a socket screw..

.A hex cap screw has a hexagonal head, designed to be driven by a wrench.

. Square bolts are typically mated with square-headed nuts.Square Head Bolt, Steel, Grade 2, Zinc Plated, 5/16"-18 Thread Size, 4" Lg, 10 PK Compared to standard hex bolts, square bolts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening).

.A lock nut is a nut that resists loosening under vibrations and torque.

.A lock nut is a nut that resists loosening under vibrations and torque.