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  • Where 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.
This type of recess has a large center opening, tapered wings, and blunt bottom, with all edges relieved or rounded.
Unit of Measure

Manufacturer

Manufacturer

 N/A Industrial Fasteners Institute

Specifications

Product

 N/A Tapping Screws

Unit of Measure

 N/A English

Type

 N/A Type I

Nominal Size or Basic Screw Dia.

 N/A No. 14

Nominal Size or Basic Screw Dia. (Decimal)

 N/A 0.2420 in

Ref. Recess Dia. (M)

 N/A 0.276 in

Ref. Recess Depth (T)

 N/A 0.160 in

Ref. Recess Width (N)

 N/A 0.036 in

Driver Size

 N/A 3

Max. Recess Penetration Gaging Depth

 N/A 0.154 in

Min. Recess Penetration Gaging Depth

 N/A 0.131 in

Codes and Standards

Codes and Standards

 N/A Abstract of ASME B18.6.4 1998
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