Allstar Performance Thin OD Jam Nut 5/8-18" LH Thread Aluminum Black Anodize - Set of 50 R09J003L 4-1/2 in Long

4-1/2 in Long

3 x 3-1/2 in Mounting Square

Cylinder Head Porting Kit

Outside box dimensions 16-1/8" x 9-5/8" x 10-7/8" tall

Allstar Performance Thin OD Jam Nut 5/8-18" LH Thread Aluminum Black Anodize - Set of 50 R09J003L 4-1/2 in LongSpecialty jam nuts have smaller outside diameters, allowing smaller wrenches to be used when changing radius rod lengths. Example: with 1 2" bolts, the same 3 4" wrench can be used to adjust radius rod or mounting hole locations. Package of 50. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over 30 years,