Thread: Cobra 427 knockoff spinner thread size
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Old 07-19-2015, 11:32 AM
strictlypersonl strictlypersonl is offline
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Join Date: Nov 2003
Location: New Britain, CT
Cobra Make, Engine: Size 10 Feet
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We've been using the Halibrand wing nuts for about 30 years. A couple of years ago (when Halibrand changed hands) we got a batch that wasn't quite like the older ones. I think they're OK now. The Vintage Wheel wing nuts are useable, but the threads are about 005" larger.

When we machine our hubs, we use these specs:
OD: 2.320"-2.33"
60 deg. Unified form thread, 8 tpi.
Pitch diameter: 2.244"-2.249" measured by 3-wire method or pitch micrometer.
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