High-strength aluminum alloy nuts engineered for aerospace and industrial sectors.
ASTM F467/F467M Grade A92024 Alloy 2024 Nuts provide exceptional fatigue resistance, high strength, and lightweight performance for demanding aerospace and engineering applications.
| UNS DesignationNumber | Alloy | GeneralName | Al A | Cr | Cu | Fe, max | M,max | Si,max | Ti,max | Zn,max | Mn | Other Elements, max | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Each | Total | ||||||||||||
| ASTM F467/F467M Grade A92024 | 2024 | Aluminum 2024 | balance | 0.10max | 3.8-4.9 | 0.50 | 0.30-0.9 | 0.50 | 0.15 B | 0.25 | 1.2-1.8 | 0.05 | 0.15 |
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| Alloy | Mechanical Property Marking | Hardness, min A | Proof Stress, Hex Nut min, ksi | Proof Stress, Heavy Hex Nut min, ksi B |
|---|---|---|---|---|
| ASTM F467 Alloy Al 2024-T4C | F 467X | 70 HRB | 55 | 59 |
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| Alloy | Mechanical Property Marking | Hardness, min A | Proof Stress, Mpa |
|---|---|---|---|
| ASTM F467M Al 2024-T4B | F467MX | 70 HRB | 380 |
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| Nominal Size, in. | Coarse Threads-UNC | Fine Threads-UNF | 8 Thread Series-8UN | |||
|---|---|---|---|---|---|---|
| Threads/in. | Stress Area A, in 2 | Threads/in. | Stress Area A, in 2 | Threads/in. | Stress Area A, in 2 | |
| 1/ 4 | 20 | 0.0318 | 28 | 0.0364 | . . . | . . . |
| 5/ 16 | 18 | 0.0524 | 24 | 0.0580 | . . . | . . . |
| 3/ 8 | 16 | 0.0775 | 24 | 0.0878 | . . . | . . . |
| 7/ 16 | 14 | 0.1063 | 20 | 0.1187 | . . . | . . . |
| 1/ 2 | 13 | 0.1419 | 20 | 0.1599 | . . . | . . . |
| 9/ 16 | 12 | 0.1820 | 18 | 0.2030 | . . . | . . . |
| 5/ 8 | 11 | 0.2260 | 18 | 0.2560 | . . . | . . . |
| 3/ 4 | 10 | 0.3340 | 16 | 0.3730 | . . . | . . . |
| 7/ 8 | 9 | 0.4620 | 14 | 0.5090 | . . . | . . . |
| 1 | 8 | 0.6060 | 12 | 0.6630 | . . . | . . . |
| 1 1/ 8 | 7 | 0.7630 | 12 | 0.8560 | 8 | 0.790 |
| 1 1/ 4 | 7 | 0.9690 | 12 | 1.0730 | 8 | 1.000 |
| 1 3/ 8 | 6 | 1.1550 | 12 | 1.3150 | 8 | 1.233 |
| 1 1/ 2 | 6 | 1.4050 | 12 | 1.5810 | 8 | 1.492 |
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| Nominal Nut Diameter and Thread Pitch | Stress Area, Amm 2 | Nominal Nut Diameter and Thread Pitch | Stress Area, Amm 2 |
|---|---|---|---|
| M6 × 1 | 20.1 | M16 × 2 | 157 |
| M8 × 1.25 | 36.6 | M20 × 2.5 | 245 |
| M10 × 1.5 | 58.0 | M24 × 3 | 353 |
| M12 × 1.75 | 84.3 | M30 × 3.5 | 561 |
| M14 × 2 | 115 | M36 × 4 | 817 |
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Except as provided in 4.2.3, nuts are furnished in the condition below (4.2.2). When required, stress relieving is specified by the purchaser for all copper alloys and nickel alloys 400 and 405 (4.2.3). Unless otherwise specified, nuts may be hot pressed, cold formed or machined at the manufacturer's option (4.2.1).
| Alloy | Condition |
|---|---|
| Copper (all alloys) | As formed or stress relieved at manufacturer's option |
| Nickel alloys 400 and 405 | As formed or stress relieved at manufacturer's option |
| Nickel alloy 500 | Solution annealed and aged |
| Aluminum alloy 2024-T4 | Solution treated and naturally aged |
| Aluminum alloy 6061-T6 | Solution treated and artificially aged |
| Aluminum alloy 6262-T9 | Solution treated, artificially aged, and cold worked |
| Titanium 625 | Annealed |
UNS A92024 is alloy 2024-T4, listed in Table 1 of ASTM F467-13ε2 as aluminum 2024. Key composition limits: copper 3.8-4.9 %, magnesium 1.2-1.8 %, manganese 0.30-0.9 %, aluminum balance. Aluminum alloy 2024-T4 is furnished solution treated and naturally aged (4.2.2). Table 2 note C: 2024-T4 is not recommended for nuts in sizes greater than 1/4 (0.250) in.
Table 2 requires a minimum hardness of 70 HRB and a minimum proof stress of 55 ksi for hex nuts and 59 ksi for heavy hex nuts. Heavy hex values are 1.08 times the hex nut value (note B). For aluminum and titanium alloys the hardness values are for information only (note A). Where both proof load and hardness are tested, proof load governs acceptance (6.2).
Proof load is the Table 2 proof stress times the Table 4 tensile stress area (13.2.1, tested per ASTM F606). For 1/4-20 UNC the stress area is 0.0318 sq in, so a hex nut must carry 1,749 lbf (55 ksi) and a heavy hex nut 1,876 lbf (59 ksi) without failure.
Each nut carries the manufacturer's symbol and the Table 2 marking F 467X, raised or depressed (17.1). Unless otherwise specified, dimensions are to ASME B18.2.2 (7.1), threads are Class 2B to ASME B1.1 (7.2) and nuts are furnished without any additive chemical or metallic finish (8.2). Mating bolts, cap screws and studs are covered by ASTM F468 (1.2).
