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Jan 17, 2017 3:07 pm
Jan 17, 2017 3:07 pm
Subject: Re: Chassis lubrication fitting wanted
I don't have any thread gauges at home but I agree that it seems as if it should be a pipe thread. However...the OD measures as 7.9mm with my Vernier which is almost exactly 5/16". The thread also appears to be too fine to be BSP. UNF is 24tpi. I have some UNF taps somewhere so will try it. The only other imperial thread I've found that looks similar is BSC (CEI) cycle threads (26tpi). Brass pipe screw threads would have been the obvious choice but there isn't a 5/16" size.
I'm going to have to identify the thread properly before I go any further - unless anyone has one they can let me have of course?
I don't have any thread gauges at home but I agree that it seems as if it should be a pipe thread. However...the OD measures as 7.9mm with my Vernier which is almost exactly 5/16". The thread also appears to be too fine to be BSP. UNF is 24tpi. I have some UNF taps somewhere so will try it. The only other imperial thread I've found that looks similar is BSC (CEI) cycle threads (26tpi). Brass pipe screw threads would have been the obvious choice but there isn't a 5/16" size.
I'm going to have to identify the thread properly before I go any further - unless anyone has one they can let me have of course?