Type 1 Cross Recessed 100 deg Flat Countersunk Head Machine Screws - Coarse UNC

Standard ASME B18.6.3-2003
Description Type 1 Cross Recessed 100 deg Flat Countersunk Head Machine Screw, ASME B18.6.3, No. 1 - 64 x 0.125
Part number ASME B18.6.3 - T1 CR100DFCHMS - UNC - NS No. 1 x L 0.125 - TL 0.125
Product selection
Selector Nominal Size Basic Screw Diameter (inch) A Max. - Head Diameter (inch) A Min. - Head Diameter (inch) H Ref. - Head Height (inch) M Ref. - Recess Dimeter (inch) T Ref. - Recess Depth (inch) N Ref. - Recess Width (inch) Driver Size Recess Penetration Gaging Depth Max (inch) Recess Penetration Gaging Depth Min (inch) F Max. - Protrusion Above Gaging Diameter (inch) F Min. - Protrusion Above Gaging Diameter (inch) G - Gaging Diameter (inch)
1 No. 1 0.073 0.137 0.118 0.031 0.062 0.035 0.014 0 0.036 0.02 0.021 0.013 0.098
2 No. 2 0.086 0.162 0.142 0.037 0.088 0.048 0.012 1 0.049 0.033 0.022 0.014 0.121
3 No. 3 0.099 0.187 0.165 0.043 0.096 0.055 0.014 1 0.056 0.04 0.024 0.015 0.144
4 No. 4 0.112 0.212 0.188 0.049 0.11 0.07 0.018 1 0.071 0.055 0.025 0.016 0.167
5 No. 6 0.138 0.262 0.235 0.06 0.148 0.074 0.027 2 0.075 0.052 0.028 0.017 0.214
6 No. 8 0.164 0.312 0.282 0.072 0.162 0.09 0.028 2 0.09 0.067 0.031 0.019 0.261
7 No. 10 0.19 0.362 0.329 0.083 0.178 0.104 0.03 2 0.105 0.082 0.034 0.021 0.307
8 1/4 0.25 0.477 0.437 0.11 0.24 0.124 0.033 3 0.118 0.095 0.04 0.025 0.415
9 5/16 0.3125 0.597 0.55 0.138 0.31 0.157 0.053 4 0.148 0.126 0.047 0.03 0.526
10 3/8 0.375 0.717 0.662 0.165 0.336 0.182 0.056 4 0.173 0.151 0.053 0.034 0.638
Nominal Size
Basic Screw Diameter (inch)
A Max. - Head Diameter (inch)
A Min. - Head Diameter (inch)
H Ref. - Head Height (inch)
M Ref. - Recess Dimeter (inch)
T Ref. - Recess Depth (inch)
N Ref. - Recess Width (inch)
Driver Size
Recess Penetration Gaging Depth Max (inch)
Recess Penetration Gaging Depth Min (inch)
F Max. - Protrusion Above Gaging Diameter (inch)
F Min. - Protrusion Above Gaging Diameter (inch)
G - Gaging Diameter (inch)
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