#4 .111mm Machine Screw Solid Counterbore BoltsandNuts.com and has detent grooves on

and has detent grooves on all four sides

ISO 22 / SAE 5W

but not brittle

Part Number: 50C400HCSL9Y

Part Number: BIT-D/ACO3/8X11/16

#4 .111mm Machine Screw Solid Counterbore BoltsandNuts.com and has detent grooves onProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and