• Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • Head dimensions not shown are the same as those of slotted heads
  • Not practical to gage sizes No. 0 and No. 1.
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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 Flat Countersunk Head Tapping Screw, 0.5000" Nominal Dia. N/A Type I N/A 1/2 in N/A 0.418 in N/A 0.265 in N/A 0.069 in N/A 4
N/A Type IA Cross Recessed Flat Countersunk Head Tapping Screw, 0.5000" Nominal Dia. N/A Type IA N/A 1/2 in N/A 0.418 in N/A 0.271 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Flat Countersunk Head Tapping Screw, 0.5000" Nominal 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 Flat Countersunk Head Tapping Screw, 0.2500" Nominal 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 Flat Countersunk Head Tapping Screw, 0.2500" Nominal Dia. N/A Type IA N/A 1/4 in N/A 0.276 in N/A 0.164 in N/A 0.057 in N/A 3
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.2500" Nominal Dia. N/A Type I N/A 1/4 in N/A 0.276 in N/A 0.160 in N/A 0.036 in N/A 3
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.3750" Nominal Dia. N/A Type I N/A 3/8 in N/A 0.386 in N/A 0.234 in N/A 0.065 in N/A 4
N/A Type IA Cross Recessed Flat Countersunk Head Tapping Screw, 0.3750" Nominal Dia. N/A Type IA N/A 3/8 in N/A 0.386 in N/A 0.239 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Flat Countersunk Head Tapping Screw, 0.3750" Nominal 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 Flat Countersunk Head Tapping Screw, 0.3125" Nominal 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 Flat Countersunk Head Tapping Screw, 0.3125" Nominal Dia. N/A Type IA N/A 5/16 in N/A 0.358 in N/A 0.211 in N/A 0.086 in N/A 4
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.3125" Nominal Dia. N/A Type I N/A 5/16 in N/A 0.358 in N/A 0.205 in N/A 0.061 in N/A 4
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.4375" Nominal Dia. N/A Type I N/A 7/16 in N/A 0.402 in N/A 0.250 in N/A 0.068 in N/A 4
N/A Type IA Cross Recessed Flat Countersunk Head Tapping Screw, 0.4375" Nominal Dia. N/A Type IA N/A 7/16 in N/A 0.402 in N/A 0.256 in N/A 0.086 in N/A 4
N/A Type II Cross Recessed Flat Countersunk Head Tapping Screw, 0.4375" Nominal 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 Flat Countersunk Head Tapping Screw, 0.0600" Nominal 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 Flat Countersunk Head Tapping Screw, 0.0600" Nominal Dia. N/A Type IA N/A No. 0 N/A 0.062 in N/A 0.036 in N/A 0.018 in N/A 0
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.0600" Nominal Dia. N/A Type I N/A No. 0 N/A 0.062 in N/A 0.035 in N/A 0.014 in N/A 0
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.0730" Nominal Dia. N/A Type I N/A No. 1 N/A 0.070 in N/A 0.043 in N/A 0.015 in N/A 0
N/A Type IA Cross Recessed Flat Countersunk Head Tapping Screw, 0.0730" Nominal Dia. N/A Type IA N/A No. 1 N/A 0.070 in N/A 0.044 in N/A 0.018 in N/A 0
N/A Type II Cross Recessed Flat Countersunk Head Tapping Screw, 0.0730" Nominal 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 Flat Countersunk Head Tapping Screw, 0.1900" Nominal 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 Flat Countersunk Head Tapping Screw, 0.1900" Nominal Dia. N/A Type IA N/A No. 10 N/A 0.198 in N/A 0.127 in N/A 0.041 in N/A 2
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.1900" Nominal Dia. N/A Type I N/A No. 10 N/A 0.198 in N/A 0.124 in N/A 0.032 in N/A 2
N/A Type I Cross Recessed Flat Countersunk Head Tapping Screw, 0.2160" Nominal Dia. N/A Type I N/A No. 12 N/A 0.262 in N/A 0.144 in N/A 0.035 in N/A 3
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