Lister 5/1 Diesel

Threading Tables

Chart No 5 - SI Metric Threads (60 Deg Angle)


SI Metric Threads (60 Deg Angle)
Dimensions in Millimetres - Inch table below

Thread Form Data Tapping Drill Clearance Drill
Diameter O/Diameter Core Pitch Depth Flat Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac
6mm 6.00mm 4.70mm 1.00mm 0.650mm 0.125mm 5.350mm 25.40 5.00mm 6.10mm
7mm 7.00mm 5.70mm 1.00mm 0.650mm 0.125mm 6.350mm 25.40 6.00mm 9/32"
8mm 8.00mm 6.376mm 1.25mm 0.812mm 0.156mm 7.188mm 20.32 17/64" 8.20mm
9mm 9.00mm 7.376mm 1.25mm 0.812mm 0.156mm 8.188mm 20.32 7.70mm 23/64"
10mm 10.00mm 8.052mm 1.50mm 0.974mm 0.187mm 9.026mm 16.933 8.40mm 10.30mm
11mm 11.00mm 9.052mm 1.50mm 0.974mm 0.187mm 10.026mm 16.933 9.50mm 7/16"
12mm 12.00mm 9.726mm 1.75mm 1.137mm 0.219mm 10.863mm 14.514 10.25mm 31/64"
14mm 14.00mm 11.402mm 2.00mm 1.299mm 0.250mm 12.701mm 12.70 12.00mm 9/16"
16mm 16.00mm 13.402mm 2.00mm 1.299mm 0.250mm 14.701mm 12.70 35/64" 41/64"
18mm 18.00mm 14.752mm 2.50mm 1.624mm 0.312mm 16.376mm 10.16 39/64" 23/32"
20mm 20.00mm 16.752mm 2.50mm 1.624mm 0.312mm 18.376mm 10.16 11/16" 51/64"
22mm 22.00mm 18.752mm 2.50mm 1.624mm 0.312mm 20.376mm 10.16 49/64" 7/8"
24mm 24.00mm 20.102mm 3.00mm 1.949mm 0.375mm 22.051mm 8.466 21.00mm 61/64"
27mm 27.00mm 23.102mm 3.00mm 1.949mm 0.375mm 25.051mm 8.466 24.00mm 1-5/64"
30mm 30.00mm 25.454mm 3.50mm 2.273mm 0.438mm 27.727mm 7.257 26.50mm 1-3/16"
33mm 33.00mm 28.454mm 3.50mm 2.273mm 0.438mm 30.727mm 7.257 29.50mm 1-5/16"
36mm 36.00mm 30.804mm 4.00mm 2.598mm 0.500mm 33.402mm 6.35 32.00mm 1-27/64"
39mm 39.00mm 33.804mm 4.00mm 2.598mm 0.500mm 36.402mm 6.35 35.00mm 1-35/64"

SI Metric Threads (60 Deg Angle)
Dimensions in Inches - Metric table above

Thread Form Data Tapping Drill Clearance Drill
Diameter O/Diameter Core Pitch Depth Flat Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac
6mm 0.2362 0.2244 0.0394 0.0256 0.0049 0.2106 25.40 0.1968" 0.2402"
7mm 0.2756 0.2510 0.0394 0.0256 0.0049 0.2500 25.40 0.2362" 0.2812"
8mm 0.3150 0.2510 0.0492 0.0320 0.0061 0.2830 20.32 0.2656" 0.3228"
9mm 0.3543 0.2904 0.0492 0.0320 0.0061 0.3223 20.32 0.3031" 0.3594"
10mm 0.3937 0.3170 0.0591 0.0383 0.0073 0.3553 16.933 0.3307" 0.4055"
11mm 0.4331 0.3564 0.0591 0.0383 0.0073 0.3947 16.933 0.3740" 0.4375"
12mm 0.4724 0.3829 0.0689 0.0448 0.0086 0.4277 14.514 0.4035" 0.4844"
14mm 0.5512 0.4488 0.0787 0.0512 0.0098 0.5000 12.70 0.4724" 0.5625"
16mm 0.6299 0.5276 0.0787 0.0512 0.0098 0.5787 12.70 0.5469" 0.6406"
18mm 0.7087 0.5808 0.0984 0.0639 0.0123 0.6447 10.16 0.6094" 0.7188"
20mm 0.7874 0.6596 0.0984 0.0639 0.0123 0.7234 10.16 0.6875" 0.7969"
22mm 0.8662 0.7383 0.0984 0.0639 0.0123 0.8021 10.16 0.7656" 0.8750"
24mm 0.9449 0.7914 0.1181 0.0767 0.0147 0.8682 8.466 0.8268" 0.9531"
27mm 1.0630 0.9095 0.1181 0.0767 0.0147 0.9863 8.466 0.9449" 1.0781"
30mm 1.1811 1.0021 0.1378 0.0895 0.0172 1.0916 7.257 1.0433" 1.1875"
33mm 1.2992 1.1202 0.1378 0.0895 0.0172 1.2097 7.257 1.1614" 1.3125"
36mm 1.4173 1.2128 0.1575 0.1023 0.0197 1.3150 6.35 1.2598" 1.4219!
39mm 1.5355 1.3309 0.1575 0.1023 0.0197 1.4331 6.35 1.3780" 1.5469"


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