• Applicable to screw types as indicated by code symbols.
    Type AB thread forming.
    Types B and BP thread forming and Types BF and BT thread cutting.
    Type C thread forming, Appendix; and Types D, F, G, and T thread cutting.
  • Head dimensions not shown are the same as those of slotted heads.
  • Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
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Item #

Description

Type

Nominal Size or Basic Screw Dia.

Ref. (M)

Ref. (T)

Ref. (N)

Driver Size

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N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.068" Recess Dia. N/A Type II N/A No. 0 N/A 0.067 in N/A 0.029 in N/A 0.020 in N/A Point Same on all Drivers
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.068" Recess Dia. N/A Type I N/A No. 0 N/A 0.068 in N/A 0.036 in N/A 0.014 in N/A 0
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia. N/A Type I N/A No. 1 N/A 0.070 in N/A 0.039 in N/A 0.015 in N/A 0
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia. N/A Type II N/A No. 1 N/A 0.082 in N/A 0.039 in N/A 0.022 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia. N/A Type IA N/A No. 0 N/A 0.068 in N/A 0.040 in N/A 0.018 in N/A 0
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.106" Recess Dia. N/A Type IA N/A No. 1 N/A 0.070 in N/A 0.043 in N/A 0.018 in N/A 0
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.106" Recess Dia. N/A Type II N/A No. 2 N/A 0.100 in N/A 0.050 in N/A 0.025 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.118" Recess Dia. N/A Type II N/A No. 3 N/A 0.111 in N/A 0.058 in N/A 0.026 in N/A Point Same on all Drivers
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.106" Recess Dia. N/A Type I N/A No. 2 N/A 0.106 in N/A 0.060 in N/A 0.018 in N/A 1
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.118" Recess Dia. N/A Type IA N/A No. 2 N/A 0.106 in N/A 0.065 in N/A 0.029 in N/A 1
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia. N/A Type II N/A No. 4 N/A 0.129 in N/A 0.070 in N/A 0.029 in N/A Point Same on all Drivers
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.118" Recess Dia. N/A Type I N/A No. 3 N/A 0.118 in N/A 0.072 in N/A 0.019 in N/A 1
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.152" Recess Dia. N/A Type I N/A No. 5 N/A 0.152 in N/A 0.073 in N/A 0.028 in N/A 2
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia. N/A Type IA N/A No. 3 N/A 0.118 in N/A 0.077 in N/A 0.030 in N/A 1
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.172" Recess Dia. N/A Type IA N/A No. 5 N/A 0.152 in N/A 0.080 in N/A 0.041 in N/A 2
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.152" Recess Dia. N/A Type II N/A No. 5 N/A 0.147 in N/A 0.080 in N/A 0.032 in N/A Point Same on all Drivers
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia. N/A Type I N/A No. 4 N/A 0.130 in N/A 0.086 in N/A 0.019 in N/A 1
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.172" Recess Dia. N/A Type II N/A No. 6 N/A 0.161 in N/A 0.088 in N/A 0.034 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.152" Recess Dia. N/A Type IA N/A No. 4 N/A 0.130 in N/A 0.089 in N/A 0.030 in N/A 1
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.172" Recess Dia. N/A Type I N/A No. 6 N/A 0.172 in N/A 0.092 in N/A 0.030 in N/A 2
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.176" Recess Dia. N/A Type I N/A No. 7 N/A 0.176 in N/A 0.098 in N/A 0.030 in N/A 2
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.176" Recess Dia. N/A Type IA N/A No. 6 N/A 0.172 in N/A 0.100 in N/A 0.041 in N/A 2
N/A Type II Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.176" Recess Dia. N/A Type II N/A No. 7 N/A 0.178 in N/A 0.100 in N/A 0.036 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.186" Recess Dia. N/A Type IA N/A No. 7 N/A 0.176 in N/A 0.105 in N/A 0.041 in N/A 2
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.186" Recess Dia. N/A Type I N/A No. 8 N/A 0.186 in N/A 0.107 in N/A 0.031 in N/A 2
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