Need help idendifying a body washer

[LarryN111]

The upper air deflector is uses bolts and some sort of body pressure washers. Can someone please identify this, and lead me to where I might get four of them? This is from a 1954 commander. Thanks,

[gordr]

Those are bolts with captive washers. I have a lot of them. Some have normal machine threads, typically 5/16-18, and some have a square-profile thread that engages a special J-nut. Those in the pic are the 5/16-18 type, I think. Russ Ware should have some.

[Skip Lackie]

What Gord said. If it goes into a weld nut or cage nut, it's 5/16-18 thread. If so, it's probably a part number 1905x10, which was 5/8" long. Note that the 1905x bolt/washer combos came in other lengths.

[LarryN111]

You guys are terrific. Thank you. I ordered some from studebaker-intl.com.