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    2. ASTM F467 Grade A92024

    ASTM F467/F467M Grade A92024 Alloy 2024 Nuts Specification

    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.

    ASTM F467/F467M Chemical Composition

    ASTM F467/F467M Aluminum-Base Alloys A

    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
    • (A) Analysis shall regularly be made only for the elements specified in this table. If, however, the presence of other elements is suspected or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess of the specified limits.
    • (B) Titanium + zirconium 0.20 %, max.

    ASTM F467/F467M Mechanical Requirements

    ASTM F467/F467M Mechanical Requirements (Inch)

    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
    • (A) For aluminum and titanium alloys hardness values are for information only.
    • (B) Proof stress values for heavy hex nuts are based on 1.08 times the value for corresponding regular hex nuts.
    • (C) Aluminum alloy 2024-T4 shall be supplied in naturally aged condition. This material is not recommended for nuts in sizes greater than 1/4 (0.250) in.

    ASTM F467M Mechanical Requirements (Metric)

    Alloy Mechanical Property Marking Hardness, min A Proof Stress, Mpa
    ASTM F467M Al 2024-T4B F467MX 70 HRB 380
    • (A) For aluminum and titanium alloys hardness values are for information only.
    • (B) Aluminum alloy 2024-T4 shall be supplied in naturally aged condition. This material is not recommended for nuts in nominal thread diameter larger than M6.

    ASTM F467/F467M Tensile Stress Areas and Threads per Inch

    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
    • (A) Tensile stress areas are computed using the following formula:
    • A s = 0.7854 [ D - 0.9743/n ]
      • where:
      • As = tensile stress area, in. 2 ,
      • D = nominal size (basic major diameter), in., and
      • n = number of threads per inch.

    ASTM F467/F467M Tensile Stress Areas and Threads per Metric

    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
    • (A) Tensile stress areas are computed using the following formula:
    • As = 0.7854 (D − 0.9382P) 2
      • where:
      • As = tensile stress area, mm. 2 ,
      • D = nominal size (basic major diameter), mm., and
      • n = number of threads per mm.

    ASTM F467/F467M Heat Treatment

    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

    Frequently Asked Questions

    What is Aluminum 2024 (A92024)?

    Aluminum 2024 is an Al-Cu-Mg-Mn alloy (~4.4 Cu, 1.5 Mg, 0.6 Mn) - the workhorse high-strength aerospace aluminum per ASTM F467 for nonferrous nut. Most nut is supplied in T351, T4, or T81 temper. Tensile 60-70 ksi, yield 40-50 ksi in T4 condition. Vastly higher strength than 6xxx-series, lower corrosion resistance.

    When use 2024 aluminum bolts over 6061?

    Use 2024 for aerospace structural fasteners and any application where the strength + fatigue performance of T4/T81 temper is required. Use 6061 for general structural, marine, and corrosion-exposed nut where 2024's reduced corrosion resistance is a problem.

    How is 2024 corrosion resistance vs 6061?

    2024 has 4.4% copper which makes it susceptible to intergranular and exfoliation corrosion in chloride environments. For marine nut and structural seawater service, 6061 (Mg-Si, no Cu) is the standard choice. For aircraft frames, 2024's strength wins.

    Available dimensional patterns?

    Aerospace standards (NAS, MS, AS) dominate 2024 nut demand. ASME B18.2.1 hex bolts and B18.3 socket head cap screws available per F467 in 2024-T4 / T351 for general engineering.

    References & Standards

    • ASTM F467 / F467M - Standard Specification for Nonferrous Nuts for General Use
    • ASTM F468 / F468M - Companion specification for Nonferrous Bolts, Hex Cap Screws, and Studs (mate with F467 nuts for matched-alloy assemblies)
    • ASTM F436 / F436M - Hardened steel washers (ferrous washer companion when nonferrous washers are not specified)
    • NACE MR0175 / ISO 15156 - Sour-service hardness limits for petroleum and natural gas industries
    • ASME B18.2.2 / B18.2.4.1M / B18.2.4.6M and ISO 4032 / 4033 / 4035 - Dimensional standards referenced by F467
    • DIN 934 / 439 / 6330 - Metric hex nut dimensional standards
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