• Applicable to screw types as indicated by code symbols.
    Type AB thread forming.
    Type A thread forming, except for short lengths.
    Types B and BP thread forming; and Types BF and BT thread cutting
    Type C thread forming; 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 I Cross Recessed Oval Countersunk Head Tapping Screw, with 0.430" Recess Dia. N/A Type I N/A 1/2 in N/A 0.430 in N/A 0.271 in N/A 0.071 in N/A 4
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.430" Recess Dia. N/A Type IA N/A 1/2 in N/A 0.430 in N/A 0.280 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.430" Recess Dia. N/A Type II N/A 1/2 in N/A 0.593 in N/A 0.358 in N/A 0.098 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.284" Recess Dia. N/A Type II N/A 1/4 in N/A 0.344 in N/A 0.195 in N/A 0.061 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.284" Recess Dia. N/A Type IA N/A 1/4 in N/A 0.284 in N/A 0.168 in N/A 0.057 in N/A 3
N/A Type I Cross Recessed 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 Oval Countersunk Head Tapping Screw, with 0.404" Recess Dia. N/A Type I N/A 3/8 in N/A 0.404 in N/A 0.245 in N/A 0.068 in N/A 4
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.404" Recess Dia. N/A Type IA N/A 3/8 in N/A 0.404 in N/A 0.253 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.404" Recess Dia. N/A Type II N/A 3/8 in N/A 0.509 in N/A 0.302 in N/A 0.086 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.384" Recess Dia. N/A Type II N/A 5/16 in N/A 0.432 in N/A 0.252 in N/A 0.074 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.384" Recess Dia. N/A Type IA N/A 5/16 in N/A 0.384 in N/A 0.232 in N/A 0.086 in N/A 4
N/A Type I Cross Recessed Oval Countersunk Head Tapping Screw, with 0.384" Recess Dia. N/A Type I N/A 5/16 in N/A 0.384 in N/A 0.226 in N/A 0.065 in N/A 4
N/A Type I Cross Recessed Oval Countersunk Head Tapping Screw, with 0.416" Recess Dia. N/A Type I N/A 7/16 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 Oval Countersunk Head Tapping Screw, with 0.416" Recess Dia. N/A Type IA N/A 7/16 in N/A 0.416 in N/A 0.265 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.416" Recess Dia. N/A Type II N/A 7/16 in N/A 0.554 in N/A 0.332 in N/A 0.092 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.068" Recess Dia. N/A Type II N/A No. 0 N/A 0.078 in N/A 0.036 in N/A 0.021 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.068" 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 I Cross Recessed 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 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 IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.070" 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 Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia. N/A Type II N/A No. 1 N/A 0.092 in N/A 0.048 in N/A 0.024 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.202" Recess Dia. N/A Type II N/A No. 10 N/A 0.260 in N/A 0.148 in N/A 0.048 in N/A Point Same on all Drivers
N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.202" Recess Dia. N/A Type IA N/A No. 10 N/A 0.202 in N/A 0.132 in N/A 0.041 in N/A 2
N/A Type I Cross Recessed 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 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
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