3/16" IMPERIAL BOTTOM YOKE COUNTERSUNK SCREW (1)

3/16" IMPERIAL BOTTOM YOKE COUNTERSUNK SCREW (1)

3/16" x 32TPI X 7/16" LONG

A STAINLESS STEEL COUNTERSUNK SLOTTED SCREW, 32TPI USED TO ATTACH THE TUBULAR FORK SHROUD TO THE BOTTOM YOKE.  ORIGINALLY WHEN DRAWN IN THE LATE THIRTIES THIS WAS A CYCLE THREAD, LATER CHANGED TO BSF BOTH OF WHICH AT 3/16" ARE 32TPI.  2BA HAS A MAJOR DIAMETER OF .185" BUT A TPI EQUIVALENT TO 31.3 SO IS CLOSE BUT NOT CORRECT.  3BA IS SMALLER AT .161" AND PITCH AT 34.4TPI.  3/16" (.187" - 4.7MM).  DIAMETER IS ABSOLUTELY CORRECT AND SUITABLE FOR ALL THE BOTTOM YOKES USING THIS SCREW FROM LATE THIRTIES RIGHT THROUGH TO THE EARLY COMMANDO AND ALL THE HYBRIDS, P11 ETC..  THE TROUBLE IS THE CORRECT SCREW TENDS NOT TO FIT OR SEEM LIKE IT WILL NOT FIT.  IT IS A VERY FINE THREAD AND YEARS OF VERDIGRE, CORROSION, WRONG SCREWS BEING USED, PAINT, DIRT ETC.. CAN MAKE THE SCREW APPEAR NOT TO FIT.  I WOULD SUGGEST RUNNING A 32TPI TAP INTO EACH HOLE BEFORE FITTING THE SCREWS.  THIS COULD BE CYCLE THREAD OR MORE COMMONLY BSF.

ALSO SEE T7026 FOR A PACK OF 6 SCREWS, T70230 FOR A PACK OF 30 SCREWS, T594 FOR LEATHER WASHER AND 067515 FOR A THREE HOLED WASHER.