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The ASME B18.2.1 hex flange screw is constructed in three sections including a hexagonal head, a disc-like flange, and a threaded rod. It has same tightening function as that of a common hex cap screw plus a washer. Due to the extensive contact surface between the flange and the work piece, the better tightening can be assured. The bottom surface of the flange may be flat and smooth, or corrugated.
Size | E | F | ||
Max. | Min. | Max. | Min. | |
1/4" | 0.2500 | 0.2450 | 0.3750 | 0.367 |
5/16" | 0.3125 | 0.3065 | 0.5000 | 0.489 |
3/8" | 0.3750 | 0.3690 | 0.5625 | 0.551 |
7/16" | 0.4375 | 0.4305 | 0.6250 | 0.612 |
1/2" | 0.5000 | 0.4930 | 0.7500 | 0.736 |
9/16" | 0.5625 | 0.5545 | 0.8125 | 0.798 |
5/8" | 0.6250 | 0.6170 | 0.9375 | 0.922 |
3/4" | 0.7500 | 0.7410 | 1.1250 | 1.100 |
Size | G | B | H | |
Max. | Min. | |||
1/4" | 0.433 | 0.409 | 0.56 | 0.28 |
5/16" | 0.577 | 0.548 | 0.68 | 0.32 |
3/8" | 0.650 | 0.618 | 0.81 | 0.39 |
7/16" | 0.722 | 0.685 | 0.93 | 0.46 |
1/2" | 0.866 | 0.825 | 1.07 | 0.51 |
9/16" | 0.938 | 0.895 | 1.19 | 0.57 |
5/8" | 1.083 | 1.034 | 1.33 | 0.62 |
3/4" | 1.299 | 1.234 | 1.59 | 0.73 |
ASME B18.2.1 Nine Types of Bolts & Screws | ||
---|---|---|
Square Head Bolt | Hex Bolt | Heavy Hex Bolt |
Askew Head Bolt | Hex Cap Screw | Heavy Hex Screw |
Hex Flange Screw | Lobed Head Screw | Lag Screw |