ARP Special Purpose Washer Kit
Both 4130 and 8740 chrome moly are alloy steels with similar chemistry. The 4130 has only .3% carbon and can’t be hardened as high as 8740, which has .4% carbon. Also, 8740 has about .45% nickel and 4130 has none. Both have moly (most alloy steels have moly). The chromium content of 4130 is slightly higher, .95% instead of .55%. However, 8740 is generally considered to have slightly better toughness due to the nickel.
Features
- 8740 Chrome Moly
- 7/16˝ x .995 x .120 (ID x OD x Thickness)
- Chamfer: No
Applications
- Universal
What’s In The Box?
- (10) M10 X 1.25 M16 Socket 12pt Nuts
Warranty
- Manufacturer Standard Warranty
