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  • 45 “ jugs

    Can 45 jugs with 3/8 studs for iron heads be modified to accept aluminum heads

  • #2
    The stud thread (3/8-16NC) has the same pitch as the bolt thread (7/16-16NS), so drill to 3/8" (pilot) and re-tap. Note: the 7/16-16NS is not coarse or fine but special, use the right tap. It's the same as VL, UL, knucklehead - but not K/KH, or big twin OHV.
    Alternative: make small sleeves to reduce the hole IDs in the heads, but you still need longer studs and something to replace the heavy cone washers under the nuts.
    The Linkert Book

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