GR8M Heavy Hex Nut

Heavy Nuts are used in the Petrochemical and Oil & Gas industry. Available in high strength alloy steel, stainless steel, duplex/super duplex and exotic materials and are fully certified and lot traceable.

United Fasteners can quickly produce non-stocked and special sizes quickly. Please send an enquiry for your Petrochemical specifications, application requirements and drawings and we will get back to you with a quote.


  • Imperial: Dia 5/16" - 2-1/2"
  • Threads: Imperial UN8, UNC
  • Pitch: 8 - 18
  • Material/Finish: Stainless Steel, Molybond & Xylan Red G316 Stainless Steel
  • Compliance: ASTM A194 Gr8M