A six-sided bolt with a trimmed hex head and a washer face on the bearing surface is a hex cap screw. It must adhere to particular limits outlined in ASME B18. 2.1-1996. Hex cap screws are widely...
Hex Cap Screws are comparable to hex bolts, but they are intended with tighter tolerances for tightening with a socket or tool. Hex cap screws are available in a range of materials and thread...