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    2. ASTM F467 Grade A96061

    ASTM F467/F467M Grade A96061 Alloy 6061 Nuts Specification

    Aluminum alloy nuts offering excellent strength and corrosion resistance.

    ASTM F467/F467M Grade A96061 Alloy 6061 Nuts are widely used in automotive, marine, and structural industries because of their lightweight properties and superior durability.

    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 A96061 6061 Aluminum 6061 balance 0.04-0.35 0.15-0.40 0.7 0.15 0.40-0.8 0.15 0.25 0.8-1.2 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.

    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 6061-T6 F 467Y 40 HRB 40 43
    • (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.

    ASTM F467M Mechanical Requirements (Metric)

    Alloy Mechanical Property Marking Hardness, min A Proof Stress, Mpa
    ASTM F467M Al 6061-T6 F467MY 40 HRB 275
    • (A) For aluminum and titanium alloys hardness values are for information only.

    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 6061 (A96061)?

    Aluminum 6061 is an Al-Mg-Si alloy (~1.0 Mg, 0.6 Si, 0.28 Cu, 0.20 Cr) - the workhorse general-purpose structural aluminum per ASTM F467 for nonferrous nut. Standard temper for bolts is T6 (artificially aged): tensile 42 ksi, yield 35 ksi, elongation 10%. Excellent weldability + corrosion resistance, moderate strength.

    When use 6061-T6 aluminum bolts?

    Marine fastenings, structural framing, transportation equipment, and any application requiring lightweight + atmospheric/seawater corrosion resistance. Most common general-purpose aluminum fastener. Pair with 6061 nuts per ASTM F467 to avoid galvanic mismatch.

    How does 6061 corrosion resistance compare to 2024?

    6061 is dramatically better in chloride environments because it has only 0.28% copper (vs 4.4% in 2024). Used widely in marine + saltwater structural bolting. 7075 (zinc-based) is better in some industrial atmospheres but less weldable than 6061.

    Available dimensional patterns?

    Available across the full F467 range: ASME B18.2.1 hex bolts, B18.3 socket head, B18.6.7M metric machine screws, B16.5 flange studs. Typically supplied in T6 temper unless customer specifies otherwise.

    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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