We-re nuts about bolts. Imperial, Unified & Metric.
5/16 UNC x 1 1/2 Gr S HT HEX BOLTS ZINC/YELLOW
Product Code: HHONC0310150//Y
Hex Head Bolts are available in various threads, materials & finishes. They have a plain portion under the head unlike a setscrew which is fully threaded.
from Kerridge Commercial Systems Ltd