WD Motorcycle forum

Author

Comment

Aug 24, 2011 - 7:43AM

What thread are the bolts for rubber knee pad on BSA m20

Hi. Just a quick question what are the thread pattern of the 1/4 inch bolts that hold the rubber kneegards on for the BSA? Also I looked everywhere but couldn't find the info anywhere. Did I miss it?

email (option): Jeff@infinitymedspa.com

Ron Pier

Aug 24, 2011 - 9:28AM

Re: What thread are the bolts for rubber knee pad on BSA m20

BSC or BSF 26tpi. Ron

email (option): ronpier@talk21.com

Jeff

Aug 25, 2011 - 8:06AM

Re: What thread are the bolts for rubber knee pad on BSA m20

Thanks

email (option): Jeff@infinitymedspa.com

Robb @ British Tool

Aug 25, 2011 - 2:25PM

Re: What thread are the bolts for rubber knee pad on BSA m20

Hi Jeff,

BSCY is 60 degree thread pitch.

BSF is 55 degrees.

email (option): britool51@hotmail.com

Ian Wright

Aug 25, 2011 - 2:33PM

Re: What thread are the bolts for rubber knee pad on BSA m20

Yes, the original screws were Cycle thread so the thread angle would be 60 degrees as Robb indicated.
BSF is commonly referred to as an eqivalent to cycle thread at 1/4" diameter (where the TPI are the same) but although it is useable, that is not strictly the case...Ian

email (option): ian@wright52.plus.com