ASME B 18.2.1 - 2010
Display drawing:
Screw Thread | 1/4 | ||
Thread Size | 1/4 | ||
D | 0.25 | ||
PP | UNC | 20 | |
PP | UNF | 28 | |
Ds | Max | 0.25 | |
Ds | Min | 0.245 | |
S | Basic | 3/8 | |
S | Max | 0.375 | |
S | Min | 0.367 | |
E | Max | 0.433 | |
E | Min | 0.409 | |
Dc | Max | 0.56 | |
C | Min | 0.04 | |
K | Max | 0.28 | |
B | L≤6 | 0.75 | |
B | L>6 | 1 | |
R | Max | 0.025 | |
R | Min | 0.015 |