UNF A2 Stainless Part Thread Socket Cap Head Allen Bolts 8,10,1/4",5/16,3/8"1/2"
UNF Socket Cap Screws. UNF socket cap screws. 10"UNF - 32tpi, allen key size 5/32". Threads are Unified National Fine (UNF). 1/4"UNF - 28tpi, allen key size 3/16". 5/16"UNF - 24tpi, allen key size 1/4".