Brand: Automotive Racing Products (ARP)
These high-strength (170,000 psi) stainless steel nuts are a perfect match for ARP 5/16-24 Stainless Steel Bolt 5-Packs (sold separately).
The 5/16-24 UNF (fine thread) nuts take a 3/8" 12-point socket, but they have a full 9/16" OD bearing surface, similar to the matching ARP 712 Series bolts. Each measures 0.348" high overall. The corrosion-resistant stainless steel has a polished finish that looks great and is easy to clean. Pack of 2 nuts.