Name: Customized Large Fastener
Standard: ASTM
Material: A193 B7, A194 2H
Size: 3-1/2 Inch
Thread: 8 UNC
Surface Finished: Black
Brand: Qishine
Source: https://www.valvegasketboltnuts.com/customized-large-fastener-a193-b7-a194-2h-3-1-2-in-8-un.html