Triumph T90 / T100 Crankcase Sump Plugs (1) - 1957-74 - Choose Plug Type Part # - Specs - Application:70-9501 / E9501 (16 TPI) - 1969-74 - T100 M Part number is 37-1996

M Part number is 37-1996 or W1996

Will need to be repainted for the best finish

Measures 12

Or just wanting to add some peace of mind

Triumph T90 / T100 Crankcase Sump Plugs (1) - 1957-74 - Choose Plug Type Part # - Specs - Application:70-9501 / E9501 (16 TPI) - 1969-74 - T100 M Part number is 37-1996New Triumph "C" range crankcase sump plug screws. There are 2 variations of screws used on the Triumph 350 and 500 twins early models have a 20 TPI pitch and later models have a 16 TPI pitch you choose which one you need Fits Triumph 350 & 500 Unit Twins (Daytona, T100R, Tiger, T100C, 3TA, 5TA, T100SS, T100A, T100T & T90) from 1957 1974 only The early 70 1564 E1564 plug will also fit many Triumph Pre Unit Twins up to 1962 when used as a rocker box