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  • Applicable to screw types as indicated by code symbols.
    Type AB thread forming.
    Type A thread forming, except for short lengths.
    Types B and BP thread forming; and Types BF and BT thread cutting
    Type C thread forming; 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.
Cross Recessed Oval Countersunk Head Tapping Screws - TYPE II
Unit of Measure
1 2 3 

Item #

Description

Type

Nominal Size or Basic Screw Dia.

Ref. (M)

Ref. (T)

Ref. (N)

Driver Size

CROCHTSIA01120XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia. N/A Type IA N/A No. 4 N/A 0.130 in N/A 0.089 in N/A 0.030 in N/A 1
CROCHTSIA01250XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.152" Recess Dia. N/A Type IA N/A No. 5 N/A 0.152 in N/A 0.080 in N/A 0.041 in N/A 2
CROCHTSIA01380XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.172" Recess Dia. N/A Type IA N/A No. 6 N/A 0.172 in N/A 0.100 in N/A 0.041 in N/A 2
CROCHTSIA01510XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.176" Recess Dia. N/A Type IA N/A No. 7 N/A 0.176 in N/A 0.105 in N/A 0.041 in N/A 2
CROCHTSIA01640XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.186" Recess Dia. N/A Type IA N/A No. 8 N/A 0.186 in N/A 0.115 in N/A 0.041 in N/A 2
CROCHTSIA01900XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.202" Recess Dia. N/A Type IA N/A No. 10 N/A 0.202 in N/A 0.132 in N/A 0.041 in N/A 2
CROCHTSIA02160XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.264" Recess Dia. N/A Type IA N/A No. 12 N/A 0.264 in N/A 0.148 in N/A 0.056 in N/A 3
CROCHTSIA02420XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.282" Recess Dia. N/A Type IA N/A No. 14 N/A 0.282 in N/A 0.166 in N/A 0.057 in N/A 3
CROCHTSIA02500XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.284" Recess Dia. N/A Type IA N/A 1/4 in N/A 0.284 in N/A 0.168 in N/A 0.057 in N/A 3
CROCHTSIA02680XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.326" Recess Dia. N/A Type IA N/A No. 16 N/A 0.326 in N/A 0.210 in N/A 0.057 in N/A 3
CROCHTSIA02940XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.374" Recess Dia. N/A Type IA N/A No. 18 N/A 0.374 in N/A 0.223 in N/A 0.085 in N/A 4
CROCHTSIA03125XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.384" Recess Dia. N/A Type IA N/A 5/16 in N/A 0.384 in N/A 0.232 in N/A 0.086 in N/A 4
CROCHTSIA03200XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.394" Recess Dia. N/A Type IA N/A No. 20 N/A 0.394 in N/A 0.242 in N/A 0.086 in N/A 4
CROCHTSIA03720XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.430" Recess Dia. N/A Type IA N/A No. 24 N/A 0.430 in N/A 0.279 in N/A 0.087 in N/A 4
CROCHTSIA03750XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.404" Recess Dia. N/A Type IA N/A 3/8 in N/A 0.404 in N/A 0.253 in N/A 0.086 in N/A 4
CROCHTSIA04375XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.416" Recess Dia. N/A Type IA N/A 7/16 in N/A 0.416 in N/A 0.265 in N/A 0.086 in N/A 4
CROCHTSIA05000XXX N/A Type IA Cross Recessed Oval Countersunk Head Tapping Screw, with 0.430" Recess Dia. N/A Type IA N/A 1/2 in N/A 0.430 in N/A 0.280 in N/A 0.086 in N/A 4
CROCHTSII00600XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.068" Recess Dia. N/A Type II N/A No. 0 N/A 0.078 in N/A 0.036 in N/A 0.021 in N/A Point Same on all Drivers
CROCHTSII00730XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.070" Recess Dia. N/A Type II N/A No. 1 N/A 0.092 in N/A 0.048 in N/A 0.024 in N/A Point Same on all Drivers
CROCHTSII00860XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.106" Recess Dia. N/A Type II N/A No. 2 N/A 0.114 in N/A 0.060 in N/A 0.027 in N/A Point Same on all Drivers
CROCHTSII00990XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.118" Recess Dia. N/A Type II N/A No. 3 N/A 0.133 in N/A 0.072 in N/A 0.030 in N/A Point Same on all Drivers
CROCHTSII01120XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.130" Recess Dia. N/A Type II N/A No. 4 N/A 0.151 in N/A 0.082 in N/A 0.032 in N/A Point Same on all Drivers
CROCHTSII01250XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.152" Recess Dia. N/A Type II N/A No. 5 N/A 0.169 in N/A 0.094 in N/A 0.035 in N/A Point Same on all Drivers
CROCHTSII01380XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.172" Recess Dia. N/A Type II N/A No. 6 N/A 0.188 in N/A 0.106 in N/A 0.038 in N/A Point Same on all Drivers
CROCHTSII01510XXX N/A Type II Cross Recessed Oval Countersunk Head Tapping Screw, with 0.176" Recess Dia. N/A Type II N/A No. 7 N/A 0.206 in N/A 0.118 in N/A 0.040 in N/A Point Same on all Drivers
Unit of Measure
1 2 3