3/8" - .371" Bullit-Balls - BB-371
Reference chart below for more details of part# above.
Regis Bullit-Balls® are the ultimate in sizing precision and durability. Tungsten carbide balls with a permanently attached steel shank are in the 90 rockwell range. Precision machined to exact specifications. Finished to .0000008” (eight millionths of an inch) perfect roundness.
When using bronze valve guides, remember the finished I.D. of the sleeve will be .001” smaller than actual ball size.
See Chart below for complete list of other Bullit-Balls
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