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- Threads within point taper length shall have unfinished crests.
- 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.
- For determining the effective grip length of BP screws.
Unit of Measure
Specifications
Product |
N/A Tapping Screws |
Unit of Measure |
N/A English |
Nominal Size or Basic Screw Dia. |
N/A No. 4 |
Nominal Size or Basic Screw Dia. (Decimal) |
N/A 0.1120 in |
Max. Major Dia. (D) |
N/A 0.114 in |
Min. Major Dia. (D) |
N/A 0.108 in |
Max. Minor Dia. (d) |
N/A 0.086 in |
Min. Minor Dia. (d) |
N/A 0.082 in |
Ref. Point Dia. (P) |
N/A 0.079 in |
Max. Point Taper Length (S) |
N/A 0.083 in |
Min. Point Taper Length (S) |
N/A 0.063 in |
Min. Practical Nominal Screw Lengths for 90º Heads (L) |
N/A 5/16 in |
Min. Practical Nominal Screw Lengths for Csk Heads (L) |
N/A 11/32 in |
