https://mutualscrew.com/products/square-head-set-screws-case-hardened-steel-oval-point-5-16-18-x-1-1-2_3124sqsobb
[100 PKG] Square Head Set Screws Case Hardened Steel Oval Point 5/16-1
Engineered for reliability, our Square Head Set Screws in case hardened steel deliver strong, secure performance in demanding environments. The square head...
square head set screws