Avoiding The Skinned Knuckle Syndrome
Header bolts and other bolts in tight locations can be troublesome to remove and install, especially in custom fabrications where there is limited accessibility. A solution is to use internal wrenching bolts (Allen bolts). To use allen bolts, taper the head as illustrated, and purchase or fabricate a long ball end wrench for installation and torquing. This method may alleviate the “skinned knuckle” syndrome that so many of us know so well.

Archie Frangoudis
Archie’s Racing Service
Nashua and Merrimack, NH
November, 2013