• 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.
  • 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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Unit of Measure
Items
Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I

Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.068" Recess Dia.
Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I

Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia.
Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I

Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.106" Recess Dia.
Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I

Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.118" Recess Dia.
Cross Recessed Undercut Oval Countersunk Head Tapping Screws - TYPE I

Type I Cross Recessed Undercut Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia.
Manufacturer N/A Industrial Fasteners Institute
Product N/A Tapping Screws
Codes and Standards N/A Abstract of ASME B18.6.4 1998
Unit of Measure N/A English
Type N/A Type I
Nominal Size or Basic Screw Dia. N/A No. 0 N/A No. 1 N/A No. 2 N/A No. 3 N/A No. 4
Nominal Size or Basic Screw Dia. (Decimal) N/A 0.0600 in N/A 0.0730 in N/A 0.0860 in N/A 0.0990 in N/A 0.1120 in
Applicable to Screw Types1 N/A 1
3
N/A 1
3
N/A 1
3
4
N/A 1
3
4
N/A 1
3
4
Ref. Recess Dia. (M) N/A 0.068 in N/A 0.070 in N/A 0.106 in N/A 0.118 in N/A 0.130 in
Ref. Recess Depth (T) N/A 0.036 in N/A 0.039 in N/A 0.060 in N/A 0.072 in N/A 0.086 in
Ref. Recess Width (N) N/A 0.014 in N/A 0.015 in N/A 0.018 in N/A 0.019 in N/A 0.019 in
Driver Size N/A 0 N/A 0 N/A 1 N/A 1 N/A 1
Max. Recess Penetration Gaging Depth N/A 0.038 in N/A 0.041 in N/A 0.062 in N/A 0.074 in N/A 0.087 in
Min. Recess Penetration Gaging Depth N/A 0.020 in N/A 0.023 in N/A 0.045 in N/A 0.057 in N/A 0.070 in
  • 1 1 = Circle, 3 = Triangle, 4 = Square
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