• Type I Cross Recessed Oval Countersunk Trim Head Tapping Screws:Long Screws with Shoulder and Short Screws
  • 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.
  • 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.
  • No tolerance for gaging diameter is given. If the gaging diameter of the gage used differs from tabulated value, the protrusion will be affected accordingly and the proper protrusion values must be recalculated using the formulas.
  • Short screws are those threaded full length.
This type of recess has a large center opening, tapered wings, and blunt bottom, with all edges relieved or rounded.
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Item #

Description

Type

Nominal Size or Basic Screw Dia.

Head Size

Ref. (M)

Ref. (T)

Ref. (N)

N/A Type I Long Screw with Shoulder, with 0.118" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 4 N/A 3 N/A 0.118 in N/A 0.072 in N/A 0.019 in
N/A Type I Long Screw with Shoulder, with 0.130" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 5 N/A 4 N/A 0.130 in N/A 0.086 in N/A 0.019 in
N/A Type I Long Screw with Shoulder, with 0.130" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 6 N/A 4 N/A 0.130 in N/A 0.086 in N/A 0.019 in
N/A Type I Long Screw with Shoulder, with 0.162" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 6 N/A 5 N/A 0.162 in N/A 0.084 in N/A 0.028 in
N/A Type I Long Screw with Shoulder, with 0.162" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 8 N/A 5 N/A 0.162 in N/A 0.084 in N/A 0.028 in
N/A Type I Long Screw with Shoulder, with 0.188" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 8 N/A 6 N/A 0.188 in N/A 0.108 in N/A 0.031 in
N/A Type I Long Screw with Shoulder, with 0.200" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 10 N/A 8 N/A 0.200 in N/A 0.122 in N/A 0.031 in
N/A Type I Long Screw with Shoulder, with 0.200" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 12 N/A 8 N/A 0.200 in N/A 0.122 in N/A 0.031 in
N/A Type I Long Screw with Shoulder, with 0.214" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 12 N/A 10 N/A 0.214 in N/A 0.136 in N/A 0.033 in
N/A Type I Long Screw with Shoulder, with 0.214" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 14 N/A 10 N/A 0.214 in N/A 0.136 in N/A 0.033 in
N/A Type I Long Screw with Shoulder, with 0.264" Recess Dia. N/A Type I Long Screw with Shoulder N/A No. 14 N/A 12 N/A 0.264 in N/A 0.140 in N/A 0.038 in
N/A Type I Long Screw with Shoulder, with 0.214" Recess Dia. N/A Type I Long Screw with Shoulder N/A 1/4 in N/A 10 N/A 0.214 in N/A 0.136 in N/A 0.033 in
N/A Type I Long Screw with Shoulder, with 0.264" Recess Dia. N/A Type I Long Screw with Shoulder N/A 1/4 in N/A 12 N/A 0.264 in N/A 0.140 in N/A 0.038 in
N/A Type I Long Screw with Shoulder, with 0.264" Recess Dia. N/A Type I Long Screw with Shoulder N/A 5/16 in N/A 12 N/A 0.264 in N/A 0.140 in N/A 0.038 in
N/A Type I Long Screw with Shoulder, with 0.284" Recess Dia. N/A Type I Long Screw with Shoulder N/A 5/16 in N/A 1/4 in N/A 0.284 in N/A 0.160 in N/A 0.040 in
N/A Type I Long Screw with Shoulder, with 0.384" Recess Dia. N/A Type I Long Screw with Shoulder N/A 3/8 in N/A 5/16 in N/A 0.384 in N/A 0.226 in N/A 0.065 in
N/A Type I Short Screw with 0.118" Recess Dia. N/A Type I Short Screws N/A No. 4 N/A 3 N/A 0.118 in N/A 0.072 in N/A 0.019 in
N/A Type I Short Screw with 0.130" Recess Dia. N/A Type I Short Screws N/A No. 5 N/A 4 N/A 0.130 in N/A 0.086 in N/A 0.019 in
N/A Type I Short Screw with 0.130" Recess Dia. N/A Type I Short Screws N/A No. 6 N/A 4 N/A 0.130 in N/A 0.086 in N/A 0.019 in
N/A Type I Short Screw with 0.162" Recess Dia. N/A Type I Short Screws N/A No. 6 N/A 5 N/A 0.152 in N/A 0.073 in N/A 0.028 in
N/A Type I Short Screw with 0.162" Recess Dia. N/A Type I Short Screws N/A No. 8 N/A 5 N/A 0.152 in N/A 0.073 in N/A 0.028 in
N/A Type I Short Screw with 0.188" Recess Dia. N/A Type I Short Screws N/A No. 8 N/A 6 N/A 0.172 in N/A 0.092 in N/A 0.030 in
N/A Type I Short Screw with 0.200" Recess Dia. N/A Type I Short Screws N/A No. 10 N/A 8 N/A 0.186 in N/A 0.107 in N/A 0.031 in
N/A Type I Short Screw with 0.200" Recess Dia. N/A Type I Short Screws N/A No. 12 N/A 8 N/A 0.186 in N/A 0.107 in N/A 0.031 in
N/A Type I Short Screw with 0.214" Recess Dia. N/A Type I Short Screws N/A No. 12 N/A 10 N/A 0.202 in N/A 0.125 in N/A 0.033 in
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