• No extrusion of excess metal beyond apex of the point resulting from thread rolling shall be permissible. A slight rounding or truncation of the point is desirable.
  • The width of flat at crest of thread shall not exceed 0.004 in. for sizes up to and including No. 8, and 0.006 in. for larger sizes.
  • Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • Sizes shown in boldface type are preferred.
  • For determining the effective grip length of Type AB screws.
Unit of Measure

Manufacturer

Manufacturer

N/A Industrial Fasteners Institute

Specifications

Product

N/A Tapping Screws

Unit of Measure

N/A English

Nominal Size or Basic Screw Dia.

N/A No. 0

Nominal Size or Basic Screw Dia. (Decimal)

N/A 0.0600 in

Max. Major Dia. (D)

N/A 0.060 in

Min. Major Dia. (D)

N/A 0.054 in

Max. Minor Dia. (d)

N/A 0.036 in

Min. Minor Dia. (d)

N/A 0.033 in

Min. Practical Nominal Screw Lengths for 90º Heads (L)

N/A 1/8 in

Min. Practical Nominal Screw Lengths for Csk Heads (L)

N/A 5/32 in

Codes and Standards

Codes and Standards

N/A ASME B18.6.4 1998

Threads Per Inch

Threads Per Inch

N/A 48
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