• Type T
  • Type Designations for Tapping Screws and Metallic Drive Screws
  • Points of screws shall be tapered and fluted or slotted as illustrated above for the respective types. The flute on Type T screws shall have an included angle of 90º to 95º and the thread cutting edge located above the axis of screw. Tapered threads shall have unfinished crests, and the flutes or slots shall extend through the first full thread beyond taper except for Type F screws on which tapered threads may be complete at manufacturer's option and flutes may be one pitch short of the first full form thread. Other details of taper and flute design shall be optional with the manufacturer, provided the screws meet the specified performance requirements.
  • Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • Screws of these nominal lengths and shorter shall have point taper lengths specified for short screws. Longer lengths shall have point taper lengths specified for long screws.
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Item #

Description

Nominal Size or Basic Product Dia.

Threads Per Inch

Max. (D)

Ref. (P)

Max. (S) For Short Screws

Max. (S) For Long Screws

N/A Thread Cutting Tapping Screw Type T, with 0.0860" Nominal Dia. N/A No. 2 N/A 56 N/A 0.0860 in N/A 0.068 in N/A 0.062 in N/A 0.080 in
N/A Thread Cutting Tapping Screw Type T, with 0.0860" Nominal Dia. N/A No. 2 N/A 64 N/A 0.0860 in N/A 0.070 in N/A 0.055 in N/A 0.070 in
N/A Thread Cutting Tapping Screw Type T, with 0.0990" Nominal Dia. N/A No. 3 N/A 48 N/A 0.099 in N/A 0.078 in N/A 0.073 in N/A 0.094 in
N/A Thread Cutting Tapping Screw Type T, with 0.0990" Nominal Dia. N/A No. 3 N/A 56 N/A 0.099 in N/A 0.081 in N/A 0.062 in N/A 0.080 in
N/A Thread Cutting Tapping Screw Type T, with 0.1120" Nominal Dia. N/A No. 4 N/A 40 N/A 0.1120 in N/A 0.087 in N/A 0.088 in N/A 0.112 in
N/A Thread Cutting Tapping Screw Type T, with 0.1120" Nominal Dia. N/A No. 4 N/A 48 N/A 0.1120 in N/A 0.091 in N/A 0.073 in N/A 0.094 in
N/A Thread Cutting Tapping Screw Type T, with 0.1250" Nominal Dia. N/A No. 5 N/A 40 N/A 0.1250 in N/A 0.100 in N/A 0.088 in N/A 0.112 in
N/A Thread Cutting Tapping Screw Type T, with 0.1250" Nominal Dia. N/A No. 5 N/A 44 N/A 0.1250 in N/A 0.102 in N/A 0.080 in N/A 0.102 in
N/A Thread Cutting Tapping Screw Type T, with 0.1380" Nominal Dia. N/A No. 6 N/A 32 N/A 0.1380 in N/A 0.107 in N/A 0.109 in N/A 0.141 in
N/A Thread Cutting Tapping Screw Type T, with 0.1380" Nominal Dia. N/A No. 6 N/A 40 N/A 0.1380 in N/A 0.113 in N/A 0.088 in N/A 0.112 in
N/A Thread Cutting Tapping Screw Type T, with 0.1640" Nominal Dia. N/A No. 8 N/A 32 N/A 0.1640 in N/A 0.132 in N/A 0.109 in N/A 0.141 in
N/A Thread Cutting Tapping Screw Type T, with 0.1640" Nominal Dia. N/A No. 8 N/A 36 N/A 0.1640 in N/A 0.136 in N/A 0.097 in N/A 0.125 in
N/A Thread Cutting Tapping Screw Type T, with 0.1900" Nominal Dia. N/A No. 10 N/A 24 N/A 0.1900 in N/A 0.148 in N/A 0.146 in N/A 0.188 in
N/A Thread Cutting Tapping Screw Type T, with 0.1900" Nominal Dia. N/A No. 10 N/A 32 N/A 0.1900 in N/A 0.158 in N/A 0.109 in N/A 0.141 in
N/A Thread Cutting Tapping Screw Type T, with 0.2160" Nominal Dia. N/A No. 12 N/A 24 N/A 0.2160 in N/A 0.174 in N/A 0.146 in N/A 0.188 in
N/A Thread Cutting Tapping Screw Type T, with 0.2160" Nominal Dia. N/A No. 12 N/A 28 N/A 0.2160 in N/A 0.180 in N/A 0.125 in N/A 0.161 in
N/A Thread Cutting Tapping Screw Type T, with 0.2500" Nominal Dia. N/A 1/4 in N/A 20 N/A 0.2500 in N/A 0.200 in N/A 0.175 in N/A 0.225 in
N/A Thread Cutting Tapping Screw Type T, with 0.2500" Nominal Dia. N/A 1/4 in N/A 28 N/A 0.2500 in N/A 0.214 in N/A 0.125 in N/A 0.161 in
N/A Thread Cutting Tapping Screw Type T, with 0.3125" Nominal Dia. N/A 5/16 in N/A 18 N/A 0.3125 in N/A 0.257 in N/A 0.194 in N/A 0.250 in
N/A Thread Cutting Tapping Screw Type T, with 0.3125" Nominal Dia. N/A 5/16 in N/A 24 N/A 0.3125 in N/A 0.271 in N/A 0.146 in N/A 0.188 in
N/A Thread Cutting Tapping Screw Type T, with 0.3750" Nominal Dia. N/A 3/8 in N/A 16 N/A 0.3750 in N/A 0.312 in N/A 0.219 in N/A 0.281 in
N/A Thread Cutting Tapping Screw Type T, with 0.3750" Nominal Dia. N/A 3/8 in N/A 24 N/A 0.3750 in N/A 0.333 in N/A 0.146 in N/A 0.188 in
N/A Thread Cutting Tapping Screw Type T, with 0.4375" Nominal Dia. N/A 7/16 in N/A 14 N/A 0.4375 in N/A 0.366 in N/A 0.250 in N/A 0.321 in
N/A Thread Cutting Tapping Screw Type T, with 0.4375" Nominal Dia. N/A 7/16 in N/A 20 N/A 0.4375 in N/A 0.387 in N/A 0.175 in N/A 0.225 in
N/A Thread Cutting Tapping Screw Type T, with 0.5000" Nominal Dia. N/A 1/2 in N/A 13 N/A 0.5 in N/A 0.423 in N/A 0.269 in N/A 0.346 in
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