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jtrichard · 06-17-2016, 10:02 PM

The 528 is a METRIC with .650 knurl and 1 3/4 under head length (UHL).... The 379 is 1/2-20 with a .620 knurl and UHL of 1-15/16 length BUT it has about 1/4" that is NOT threaded so one or both may not be long enough for your needs .....THE 138s you have now have UHL of 1-17/32 (1-1/2")

06-17-2016, 10:02 PM	#5
jtrichard Registered User Join Date: Jun 2013 Location: joshua tree ca. Posts: 1,484	Re: Longer wheel studs The 528 is a METRIC with .650 knurl and 1 3/4 under head length (UHL).... The 379 is 1/2-20 with a .620 knurl and UHL of 1-15/16 length BUT it has about 1/4" that is NOT threaded so one or both may not be long enough for your needs .....THE 138s you have now have UHL of 1-17/32 (1-1/2")