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Tokarev
07-11-2019, 12:07 PM
Have a hole missing a screw which I need to make.
Matched it to a tap from the circa 1950 Little Giant No. AA-4 tap and die set.
The tap which fits is marked 4-36 NC.
Googled and only found specs for 1/4-36 which is way lager in diameter. The major diameter of mine is less than 1/8".

Red River Rick
07-11-2019, 02:24 PM
#4 Machine screw O.D. = 0.112"

RRR

ulav8r
07-11-2019, 09:44 PM
Nominal diameter of # screws is found by the following equation: Nominal OD = .060 " +(#*.013"). In this case .060 + (4x.013) = .060 + .052 = .112