A 1951 Chevy 6400 has only simple 5/8-18 lug nuts, one per stud, hub centered wheels.
Jerry's solution is for Budd wheels with inner and outer nuts.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-