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About Nuts, Materials, and Finishes
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Extreme-Strength Steel Extra-Wide Hex
Nuts for Structural Applications—Grade DH
These nuts are designed to secure ASTM A325 bolts in structural joints. Also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts.
Hot-dipped galvanized steel nuts have a thick coating for good corrosion resistance. They must be used with other hot-dipped galvanized fasteners.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Hot-Dipped Galvanized Steel—ASTM Grade DH | ||||||
|---|---|---|---|---|---|---|
| 1/2"-13 | 7/8" | 31/64" | ASTM A563 | 25 | 000000000 | 000000 |
| 5/8"-11 | 1 1/16" | 39/64" | ASTM A563 | 10 | 000000000 | 00000 |
| 3/4"-10 | 1 1/4" | 47/64" | ASTM A563 | 10 | 000000000 | 00000 |
| 7/8"-9 | 1 7/16" | 55/64" | ASTM A563 | 10 | 000000000 | 00000 |
| 1"-8 | 1 5/8" | 63/64" | ASTM A563 | 5 | 000000000 | 00000 |
| 1 1/4"-7 | 2" | 1 7/32" | ASTM A563 | 1 | 000000000 | 0000 |
| 1 1/2"-6 | 2 3/8" | 1 15/32" | ASTM A563 | 1 | 000000000 | 00000 |
High-Strength Steel Extra-Wide Hex Nuts for Structural Applications—Grade C
These nuts are designed to secure ASTM A325 bolts in structural joints. Also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area.
Hot-dipped galvanized steel nuts have a thick coating for good corrosion resistance. They must be used with other hot-dipped galvanized fasteners.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Hot-Dipped Galvanized Steel—ASTM Grade C | ||||||
|---|---|---|---|---|---|---|
| 1/2"-13 | 7/8" | 31/64" | ASTM A563 | 5 | 000000000 | 00000 |
| 5/8"-11 | 1 1/16" | 39/64" | ASTM A563 | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 47/64" | ASTM A563 | 1 | 000000000 | 0000 |
| 7/8"-9 | 1 7/16" | 55/64" | ASTM A563 | 1 | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 63/64" | ASTM A563 | 1 | 000000000 | 00000 |
| 1 1/8"-7 | 1 3/4" | 1 7/64" | ASTM A563 | 1 | 000000000 | 00000 |
| 1 1/4"-7 | 2" | 1 7/32" | ASTM A563 | 1 | 000000000 | 00000 |
Mil. Spec. 18-8 Stainless Steel Thin Hex Nuts
Choose these nuts for their adherence to strict military standards for material and construction. Made of 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Also known as jam nuts, they are about half the height of standard hex nuts. Use them in low-clearance applications or jam one against another nut to hold it in place.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 5/32" | Fed. Spec. FF-N-836, MS35691-3 | 5 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 5/32" | Fed. Spec. FF-N-836, MS35691-7 | 1 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 3/16" | Fed. Spec. FF-N-836, MS35691-11 | 5 | 000000000 | 00000 |
| 5/16"-24 | 1/2" | 3/16" | Fed. Spec. FF-N-836, MS35691-15 | 5 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 7/32" | Fed. Spec. FF-N-836, MS35691-19 | 1 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 7/32" | Fed. Spec. FF-N-836, MS35691-23 | 1 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 1/4" | Fed. Spec. FF-N-836, MS35691-27 | 1 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 1/4" | Fed. Spec. FF-N-836, MS35691-31 | 1 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 5/16" | Fed. Spec. FF-N-836, MS35691-35 | 1 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 5/16" | Fed. Spec. FF-N-836, MS35691-39 | 1 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 3/8" | Fed. Spec. FF-N-836, MS35691-51 | 1 | 000000000 | 00000 |
| 5/8"-18 | 15/16" | 3/8" | Fed. Spec. FF-N-836, MS35691-55 | 1 | 000000000 | 00000 |
Mil. Spec. Low-Strength Steel Thin Nylon-Insert Locknuts
Choose these locknuts for their adherence to strict military standards for material and construction. About half the height of standard nylon-insert locknuts, use them in light duty low-clearance applications or jam one against a hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. A cadmium yellow-chromate plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | |||||||
|---|---|---|---|---|---|---|---|
| 4-40 | 1/4" | 1/8" | 250° | MS21083N04, NASM21083 | 10 | 000000000 | 000000 |
| 6-32 | 5/16" | 9/64" | 250° | MS21083N06, NASM21083 | 10 | 000000000 | 00000 |
| 8-32 | 11/32" | 3/16" | 250° | MS21083N08, NASM21083 | 10 | 000000000 | 0000 |
| 10-32 | 3/8" | 3/16" | 250° | MS21083N3, NASM21083 | 10 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 7/32" | 250° | MS21083N4, NASM21083 | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 5/16" | 250° | MS21083N8, NASM21083 | 1 | 000000000 | 0000 |