Type 1 Cross Recessed Oval Countersunk Trim Head Machine Screws - Long screws - Fine UNF

Standard ASME B18.6.3-2003
Description Type 1 Cross Recessed Oval Countersunk Trim Head Machine Screw, Long Screw, ASME B18.6.3, No. 5 - 44 x 1.25
Part number ASME B18.6.3 - T1 CROCTHMS - LS - UNF - NS No. 5 x L 1.25 - TL 1.25 - HS No. 4
Product selection
Selector Nominal Size Basic Screw Diameter (inch) Head Size E Max. - Shoulder Diameter (inch) E Min. - Shoulder Diameter (inch) A Max. - Head Diameter (inch) A Min. - Head Diameter (inch) H Ref. - Head Side Height (inch) C Ref. - Head Crown Height (inch) O Ref. - Total Head Height (inch) R Ref. - Head Radius (inch) M Ref. - Recess Diameter (inch) T Ref. - Recess Depth (inch) N Ref. - Recess Width (inch) Driver Size (inch) 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. 5 0.125 No. 4 0.125 0.119 0.212 0.191 0.066 0.037 0.099 0.017 0.13 0.086 0.019 1 0.087 0.07 0.069 0.048 0.172
2 1/4 0.25 No. 10 0.25 0.24 0.362 0.333 0.091 0.06 0.146 0.029 0.214 0.136 0.033 2 0.137 0.112 0.102 0.075 0.313
5 1/4 0.25 No. 12 0.25 0.24 0.412 0.38 0.124 0.068 0.187 0.033 0.264 0.14 0.038 3 0.135 0.111 0.113 0.084 0.362
3 5/16 0.3125 No. 12 0.312 0.302 0.412 0.38 0.087 0.068 0.15 0.033 0.264 0.14 0.038 3 0.135 0.111 0.113 0.084 0.362
6 5/16 0.3125 1/4 0.312 0.302 0.477 0.442 0.13 0.079 0.202 0.038 0.284 0.16 0.04 3 0.156 0.131 0.129 0.095 0.424
4 3/8 0.375 5/16 0.375 0.364 0.597 0.556 0.173 0.099 0.265 0.048 0.384 0.226 0.065 4 0.218 0.194 0.155 0.117 0.539
Nominal Size
Basic Screw Diameter (inch)
Head Size
E Max. - Shoulder Diameter (inch)
E Min. - Shoulder Diameter (inch)
A Max. - Head Diameter (inch)
A Min. - Head Diameter (inch)
H Ref. - Head Side Height (inch)
C Ref. - Head Crown Height (inch)
O Ref. - Total Head Height (inch)
R Ref. - Head Radius (inch)
M Ref. - Recess Diameter (inch)
T Ref. - Recess Depth (inch)
N Ref. - Recess Width (inch)
Driver Size (inch)
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)
1.25