• Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I
  • Type Designations for Tapping Screws and Metallic Drive Screws
  • 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

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 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 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 0.130" 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 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 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 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
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.202" Recess Dia. N/A Type I N/A No. 10 N/A 0.202 in N/A 0.125 in N/A 0.033 in N/A 2
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.264" Recess Dia. N/A Type I N/A No. 12 N/A 0.264 in N/A 0.140 in N/A 0.038 in N/A 3
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.284" Recess Dia. N/A Type I N/A 1/4 in N/A 0.284 in N/A 0.160 in N/A 0.040 in N/A 3
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.374" Recess Dia. N/A Type I N/A 5/16 in N/A 0.374 in N/A 0.214 in N/A 0.064 in N/A 4
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.394" Recess Dia. N/A Type I N/A 3/8 in N/A 0.394 in N/A 0.233 in N/A 0.066 in N/A 4
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.404" Recess Dia. N/A Type I N/A 7/16 in N/A 0.404 in N/A 0.245 in N/A 0.068 in N/A 4
N/A Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.416" Recess Dia. N/A Type I N/A 1/2 in N/A 0.416 in N/A 0.257 in N/A 0.070 in N/A 4
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 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 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 0.152" 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 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 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 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 IA Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.202" Recess Dia. N/A Type IA N/A No. 8 N/A 0.186 in N/A 0.115 in N/A 0.041 in N/A 2
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