A Hex Flange Nut is a specialized nut with a broad flange on one end acting as an integrated washer. It is designed to evenly distribute the load and prevent loosening because of vibrations. Caliper Overseas is a reliable Hex Flange Nut Supplier and Manufacturer in India, supplying a variety of sizes ranging from M4 to M16 and lengths ranging from 6mm to 500mm to accommodate diverse industrial requirements.
These nuts are manufactured to ASTM A563, JIS B1190 and DIN 6923 specifications for long-lasting performance. Our nuts are manufactured from superior material and provide higher load-carrying capacity, tensile strength, vibration loosening and corrosion resistance and tight grip. The flange eliminates the need for a washer, hence ensure easier and more reliable assembly.
Contact us today for premium hex flange nuts that satisfy your industrial needs.

| Hex Flange Nuts Size | M4 to M16 |
|---|---|
| Length of Serrated Flange Nuts | 6mm-500mm |
| SS Flange Nuts Thread Direction | Right Hand |
| Dia./Thread Size | 5/8"-11 |
| Width Across Flats | 1-1/16" |
| Standard | DIN934 DIN936 DIN439 DIN555 A194 2H, JIS B1190, DIN 6923 |
| Application | Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry |
| Thread Requirements | ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge) |
| Manufacturing Process | Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing |
| Coatings | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Nominal Size |
Basic Major Diameter of Thread |
F | G | B | H | J | K | ||||
| Width Across Flats |
Width Across Corners |
Dia. Flange |
Thickness Hex Nut |
Wrenching Length |
Flange Thickness |
||||||
| min | max. | min. | max. | min. | max. | min. | max. | min. | min. | ||
| Hex Flange Nuts | |||||||||||
| No.6 | 0.1380 | 0.302 | 0.312 | 0.342 | 0.361 | 0.406 | 0.422 | 0.156 | 0.171 | 0.10 | 0.02 |
| 8 | 0.1640 | 0.334 | 0.344 | 0.381 | 0.397 | 0.452 | 0.469 | 0.187 | 0.203 | 0.13 | 0.02 |
| 10 | 0.1900 | 0.365 | 0.375 | 0.416 | 0.433 | 0.480 | 0.500 | 0.203 | 0.219 | 0.13 | 0.03 |
| 12 | 0.2160 | 0.428 | 0.438 | 0.488 | 0.505 | 0.574 | 0.594 | 0.222 | 0.236 | 0.14 | 0.04 |
| 1/4 | 0.2500 | 0.428 | 0.438 | 0.488 | 0.505 | 0.574 | 0.594 | 0.222 | 0.236 | 0.14 | 0.04 |
| 5/16 | 0.3125 | 0.489 | 0.500 | 0.557 | 0.577 | 0.660 | 0.680 | 0.268 | 0.283 | 0.17 | 0.04 |
| 3/8 | 0.3750 | 0.551 | 0.562 | 0.628 | 0.650 | 0.728 | 0.750 | 0.330 | 0.347 | 0.23 | 0.04 |
| 7/16 | 0.4375 | 0.675 | 0.688 | 0.768 | 0.794 | 0.910 | 0.937 | 0.375 | 0.395 | 0.26 | 0.04 |
| 1/2 | 0.5000 | 0.736 | 0.750 | 0.840 | 0.866 | 1.000 | 1.031 | 0.437 | 0.458 | 0.31 | 0.05 |
| 9/16 | 0.5625 | 0.861 | 0.875 | 0.982 | 1.010 | 1.155 | 1.188 | 0.483 | 0.506 | 0.35 | 0.05 |
| 5/8 | 0.6250 | 0.922 | 0.938 | 1.051 | 1.083 | 1.248 | 1.281 | 0.545 | 0.569 | 0.40 | 0.05 |
| 3/4 | 0.7500 | 1.088 | 1.125 | 1.240 | 1.299 | 1.460 | 1.500 | 0.627 | 0.675 | 0.46 | 0.06 |
| Large Hex Flange Nuts | |||||||||||
| Nominal Size |
Basic Major Diameter of Thread |
F | G | B | H | J | K | ||||
| Width Across Flats |
Width Across Corners |
Dia. Flange |
Thickness Hex Nut |
Wrenching Length |
Flange Thickness |
||||||
| min | max. | min. | max. | min. | max. | min. | max. | min. | min. | ||
| 1/4 | 0.2500 | 0.428 | 0.438 | 0.488 | 0.505 | 0.700 | 0.728 | 0.281 | 0.312 | 0.15 | 0.04 |
| 5/16 | 0.3125 | 0.489 | 0.500 | 0.557 | 0.577 | 0.790 | 0.820 | 0.343 | 0.375 | 0.20 | 0.04 |
| 3/8 | 0.3750 | 0.551 | 0.562 | 0.628 | 0.650 | 0.885 | 0.915 | 0.390 | 0.406 | 0.24 | 0.04 |
| 7/16 | 0.4375 | 0.675 | 0.688 | 0.768 | 0.794 | 1.100 | 1.131 | 0.437 | 0.468 | 0.26 | 0.04 |
| 1/2 | 0.5000 | 0.736 | 0.750 | 0.840 | 0.866 | 1.175 | 1.205 | 0.485 | 0.515 | 0.29 | 0.06 |
| 9/16 | 0.5625 | 0.861 | 0.875 | 0.982 | 1.010 | 1.260 | 1.300 | 0.546 | 0.578 | 0.37 | 0.06 |
| 5/8 | 0.6250 | 0.922 | 0.938 | 1.051 | 1.083 | 1.280 | 1.360 | 0.600 | 0.640 | 0.42 | 0.06 |
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