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ray_mcavoy · 04-08-2011, 01:55 AM

Hi bikes&bowties,

The two female ports on the rear axle flex line are SAE 45 deg inverted flare (not AN flare which is 37 deg). They accept 3/16" diameter double flared brake line with 3/8"-24 threaded nuts.

GM changed from standard to metric banjo bolts on the calipers sometime in the late 70's (around 78 I think). So mid 70's calipers should be standard ... 7/16"-20 thread if I remember correctly.

04-08-2011, 01:55 AM	#2
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,379	Re: Brake fitting sizes Hi bikes&bowties, The two female ports on the rear axle flex line are SAE 45 deg inverted flare (not AN flare which is 37 deg). They accept 3/16" diameter double flared brake line with 3/8"-24 threaded nuts. GM changed from standard to metric banjo bolts on the calipers sometime in the late 70's (around 78 I think). So mid 70's calipers should be standard ... 7/16"-20 thread if I remember correctly. Last edited by ray_mcavoy; 04-08-2011 at 01:56 AM.