• Cross Recessed Flat Countersunk Head Tapping Screws - TYPE I
  • Type Designations for Tapping Screws and Metallic Drive Screws
  • 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 IA Cross Recessed Flat Countersunk Head Tapping Screw, 0.3720" Nominal Dia. N/A Type IA N/A No. 24 N/A 0.386 in N/A 0.239 in N/A 0.086 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 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, 0.2940" Nominal Dia. N/A Type II N/A No. 18 N/A 0.406 in N/A 0.235 in N/A 0.070 in N/A Point Same on all Drivers
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, 0.3125" 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 II Cross Recessed Flat Countersunk Head Tapping Screw, 0.3200" Nominal Dia. N/A Type II N/A No. 20 N/A 0.442 in N/A 0.258 in N/A 0.075 in N/A Point Same on all Drivers
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, 0.3720" Nominal Dia. N/A Type II N/A No. 24 N/A 0.515 in N/A 0.306 in N/A 0.086 in N/A Point Same on all Drivers
N/A Type II Cross Recessed Flat Countersunk Head Tapping Screw, 0.4375" 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, 0.5000" 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
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