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  • When 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.
Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
Unit of Measure
Items Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
CRUFCHTSI00600XXX
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.0600" Nominal Dia.
Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
CRUFCHTSI00730XXX
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.0730" Nominal Dia.
Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
CRUFCHTSI00860XXX
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.0860" Nominal Dia.
Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
CRUFCHTSI00990XXX
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.0990" Nominal Dia.
Recess Dimensions for Flat Countersunk Trim Head Tapping Screws - TYPE I
CRUFCHTSI01120XXX
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.1120" Nominal 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
Ref. Recess Dia. (M) N/A 0.062 in N/A 0.070 in N/A 0.088 in N/A 0.096 in N/A 0.110 in
Ref. Recess Depth (T) N/A 0.035 in N/A 0.043 in N/A 0.048 in N/A 0.055 in N/A 0.070 in
Ref. Recess Width (N) N/A 0.014 in N/A 0.015 in N/A 0.017 in N/A 0.018 in N/A 0.018 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 0.036 in N/A 0.044 in N/A 0.049 in N/A 0.056 in N/A 0.071 in
Min. Recess Penetration Gaging Depth N/A 0.020 in N/A 0.028 in N/A 0.033 in N/A 0.040 in N/A 0.055 in