Brand: Automotive Racing Products (ARP)
These high-strength (180,000 psi) chrome moly nuts match the ARP 3/8-24 Black Oxide Bolt 5-Packs (sold separately), but the increased wall thickness provides even higher strength.
The 3/8-24 UNF (fine thread) nuts take a large 1/2" 12-point socket (larger than the matching bolts), with an oversized 0.70" OD bearing surface (which matches the ARP 744 Series bolts). Head measures 0.42" high overall. The black oxide finish looks great and is easy to paint if desired. Pack of 10 nuts.