5/16-24 UNF STAINLESS STEEL HEX FLANGE NUT ( Set Qty: 4 ) Billet CNC Machined Stainless Steel product 1/2" AF Hex. Ideal for Harley Davidson and Buell motorcycle exhaust studs. HARLEY DAVISDON All 84-09 Big Twin and 86-09 SPORTSTER XL models; 1999-2010 TWIN CAM XB9 / XB12 / X1 Lightning / S1 / M2.

*** These nuts feature 40% more thread and hex than a standard nut, reducing the chance of rounding off and giving a better chance of removal after long periods of use ***