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Imperial Machine ScrewsWhat links here?
DiameterMajor
Dia
Close
Fit
Loose
Fit
UNCUNC 75%UNC 50%UNFUNF 75%UNF 50%
#00000.021" 160
#0000.021" 120
#000.047 90
#00.060"520.0635500.0700803/64 0.046955 0.0520na    
#10.0730"480.0760460.081064530.05951/160.062572530.0595520.0635
#20.086"
#30.099"
#40.112"32.116030.12854043.089041.09604842.093540.0980
#50.125"30.128529.13604038.10157/64.10944437.104035.1100
#60.138"3240
#80.164"3236
#100.190"2432
#120.216"2428
1/4"0.250"2028
5/16"0.3125"1824
3/8"0.3750"1624
7/16"0.43751420
1/2"0.5000"1320
9/16"0.5625"1218
5/8"0.6250"1118
11/160.6875"24 
3/4"0.7500"1016
7/8"914
1"812
1 1/8"712
1 1/4"712
1 3/8"612
1 1/2"612
1 3/4"5 
2"4.5 
2 1/4"4.5 
2 1/2"4 
2 3/4"4 
3"4 
3 1/4"4 
3 1/2"4 
3 3/4"4 
4"4 
  • 75% thread for Aluminum, Brass, & Plastics
  • 50% Thread for Steel, Stainless, & Iron

    References
    Tap & Clearance Drill Sizes
  • Imperial Machine Screws
    microprocessors - microchip 16F84A - option register
    microprocessors - microchip pics - labx 20
    microprocessors - microchip 16F84A - portb
    Machines
    programming:windows:WM_SETTEXT
    main
    working with plastic
    filename:Imperial Machine Screws
    filename:Imperial%20Machine%20Screws
    last edit:February 04 2026 09:24:46 (34 days ago)
    ct = 1773153181.000000 = March 10 2026 10:33:01
    ft = 1770215086.000000 = February 04 2026 09:24:46
    dt = 2938095.000000