1958 tach drive mounting bolts

[Howard H.]

Does anyone know what head markings were used to mount the tach drive unit to the generator for a 58? One of mine has a small "L" on the edge of the head but am not sure it is correct.
Thanks in advance for your help.
Howard Hiller

[Pat H.]

Re: 1958 tach drive mounting bolts

Howard, Most of the ones I've seen judging have been plain head bolts, however, if it has a small "L" at the circumference, then it's a period correct bolt and should not take any deduction.

[Howard H.]

Re: 1958 tach drive mounting bolts

Thanks Pat; it looks like it could be original to the unit.
Howard

[Richard M.]

Re: 1958 tach drive mounting bolts

Most I have seen same as Pat's. No markings, some with a tiny character, but probably all Grade 3 as there is no shear stress in that assembly.

[Howard H.]

Re: 1958 tach drive mounting bolts

It is a really tiny character, even with a magnifying lens, no other markings. Finish is gone so may not be worth using.