Full brass. Mounts exhaust headers to cylinder heads. Exact OEM reproduction of the OEM 7593 flanged steel exhaust lock nuts in full brass. 5/16-24 threaded, non-lock nut type. Note: Brass has the looks but is not as strong as steel.
Fits: > Exhaust to head: 84-24 Big Twin; 86-22 (NU) XL Sportster; 08-12 (NU) XR1200; 87-10 (NU) Buell XB
