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Thread: 4-36 NC thread. What are its dimensions?

  1. #1
    Boolit Master Tokarev's Avatar
    Join Date
    Aug 2007
    Canada (North of upstate NY)

    4-36 NC thread. What are its dimensions?

    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".

  2. #2
    Master Tool & Die Maker

    Red River Rick's Avatar
    Join Date
    Jun 2006
    Winnipeg, Manitoba, Canada.
    #4 Machine screw O.D. = 0.112"

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  3. #3
    Boolit Master
    Join Date
    Mar 2010
    NC Arkansas
    Nominal diameter of # screws is found by the following equation: Nominal OD = .060 " +(#*.013"). In this case .060 + (4x.013) = .060 + .052 = .112
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check