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    2. ASTM F467 Grade A96262

    ASTM F467/F467M Grade A96262 Alloy 6262 Nuts Specification

    Lightweight aluminum alloy nuts engineered for precision machining applications.

    ASTM F467/F467M Grade A96262 Alloy 6262 Nuts are manufactured using high-quality aluminum alloy material offering excellent machinability, corrosion resistance, and 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 A96262 6262 Aluminum 6262 balance 0.04-0.14 0.15-0.40 0.7 0.15 0.40-0.8 0.15 0.25 0.8-1.2 C . . .
    • (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.
    • (C) Lead 0.4-0.7 %; bismuth 0.4-0.7 %.

    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 6262-T9 F 467Z 60 HRB 52 56
    • (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 6262-T9 F467MZ 60 HRB 360
    • (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 6262 (A96262)?

    Aluminum 6262 is the free-machining variant of 6061 with lead + bismuth (~0.4-0.7% each) added for chip-breaking on screw machines. Same Al-Mg-Si chemistry and T6 mechanical properties as 6061 with significantly improved machinability for high-throughput fastener production per ASTM F467.

    When use 6262 over 6061?

    When fasteners are produced on automatic screw machines and tight tolerances + clean chip break are critical. 6262 is typically a few percent more expensive than 6061 but pays for itself in higher production throughput. Same corrosion and welding behavior as 6061.

    Is 6262 weldable like 6061?

    Less so - the lead + bismuth additions create hot-shortness issues in welding. If the bolted assembly requires welding, specify 6061. If the bolt is mechanically threaded into a separate part, 6262 is the better choice.

    Available dimensional patterns?

    Same as 6061 - all F467 ASME B16/B18 inch and metric series.

    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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