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    ASTM F468/F468M Bolting Specification

    Commercial wrought nonferrous bolts, hex cap screws, and studs and socket head cap screws in common use and intended for general service applications

    Scope

    ASTM F468 covers commercial wrought nonferrous bolts, hex cap screws and studs from 0.250 in. to 1.500 in., and socket head cap screws (socket head cap, button head and flat countersunk head configurations) from nominal thread size 0 (0.060 in.) through 1.500 in., made from alloys in common use and intended for general service applications. F468 is inch-pound only; its complete metric companion is ASTM F468M. Applicable nuts are covered by Specification ASTM F467. Unless otherwise specified, the fasteners are cold formed, hot formed or machined at the option of the manufacturer, and threads are rolled or cut, except that socket head and flat countersunk head cap screws up to 1.00 in. diameter and 6.00 in. length, and all button head cap screws, have rolled threads. The starting condition of the raw material is at the discretion of the fastener manufacturer, except as provided in Supplementary Requirement S5, but the finished products shall conform to all of the specified requirements. This page follows ASTM F468-16.

    ASTM F468/F468M Chemical Requirements

    ASTM F468/F468M Copper and Copper-Base Alloys

    UNS Designation Number  Alloy General Name Al Cu, min Fe,max Mn,max Ni,max P Si Zn, max A Pb,max Tin  As,max
    Grade C11000 110 ETP copper . . . 99.9 . . . . . . . . . . . . . . . . . . . . . . . . . . .
    Grade C26000 260 brass . . . 68.5-71.5 0.05 . . . . . . . . . . . . balance 0.07 . . . . . .
    Grade C27000 270 brass . . . 63.0-68.5 0.07 . . . . . . . . . . . . balance 0.10 . . . . . .
    Grade C46200 462 naval brass . . . 62.0-65.0 0.10 . . . . . . . . . . . . balance 0.20 0.5-1.0 . . .
    Grade C46400 464 naval brass . . . 59.0-62.0 0.10 . . . . . . . . . . . . balance 0.20 0.5-1.0 . . .
    Grade C51000 510 phosphor bronze . . . balanceA 0.10 . . . . . . 0.03-0.35 . . . 0.30 0.05 4.2-5.8 . . .
    Grade C61300 613 aluminum bronze 6.0-7.5 B 2.0-3.0 0.10 0.15C 0.015 0.10 0.05 0.01 0.20-0.50 . . .
    Grade C61400 614 aluminum bronze 6.0-8.0 88.0D 1.5-3.5 1.0 . . . . . . . . . . . . . . . . . . . . .
    Grade C63000 630 aluminum bronze 9.0-11.0 78.0D 2.0-4.0 1.5 4.0-5.5 . . . 0.25 max . . . . . . 0.20 max . . .
    Grade C64200 642 aluminum silicon bronze 6.3-7.6 88.65D 0.30 0.10 0.25 . . . 1.5-2.2E 0.50 0.05 0.20 max 0.15
    Grade C65100 651 silicon bronze . . . 96.0D 0.8 0.7 . . . . . . 0.8-2.0 1.5 0.05 . . . . . .
    Grade C65500 655 silicon bronze . . . 94.8D 0.8 1.5 0.6 . . . 2.8-3.8 1.5 0.05 . . . . . .
    Grade C66100 661 silicon bronze 0.25 max 94.0D 0.25 1.5 . . . . . . 2.8-3.5 1.5 0.20-0.8 . . . . . .
    Grade C67500 675 manganese bronze . . . 57.0-60.0 0.8-2.0 0.05-0.5 . . . . . . . . . balance 0.20 0.5-1.5 . . .
    Grade C71000 710 cupro-nickel . . . 74.0D 0.60 1.00 19.0-23.0C . . . . . . 1.00 0.05 . . . . . .
    Grade C71500 715 cupro-nickel . . . 65.0D 0.40-0.7 1.00 29.0-33.0C . . . . . . 1.00 0.05 . . . . . .
    • (A) Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100.
    • (B) Copper plus specified elements = 99.8 min; copper plus silver = 88.5-91.5.
    • (C) Cobalt is to be counted as nickel.
    • (D) Minimum content of copper plus all other elements with specified limits shall be 99.5 %.
    • (E) An alloy containing as high as 2.6 % silicon is acceptable provided the sum of all the elements other than copper, silicon, and iron does not exceed 0.30 %.

    ASTM F468/F468M Nickel and Nickel-Base Alloys

    UNS Designation Number Alloy General Name Al C, max Cr CuA Fe, max Mn, max NiA P, max Si, max Ti Co, max Mo S, max V W Cb
    Grade N10001 335 Ni-Mo . . . 0.05 1.0 max . . . 4.0- 6.0 1.0 balance 0.025 1.00 . . . 2.50 26.0- 30.0 0.030 0.2- 0.4 . . . . . .
    Grade N10276 276 Ni-Mo-Cr . . . 0.02 14.5- 16.5 . . . 4.0- 7.0 1.00 balance 0.040 0.08 . . . 2.50 15.0- 17.0 0.030 0.35 max 3.0- 4.5 . . .
    Grade N04400 400 Ni-Cu Class A . . . 0.3 . . . balance 2.5 2.0 63.0- 70.0 . . . 0.5 . . . B . . . 0.024 . . . . . . . . .
    Grade N04405 405 Ni-Cu Class B . . . 0.3 . . . balance 2.5 2.0 63.0- 70.0 . . . 0.5 . . . B . . . 0.025- 0.060 . . . . . . . . .
    Grade N05500 500 Ni-Cu-Al 2.30- 3.15 0.25 . . . balance 2.0 1.5 63.0- 70.0 ... 0.5 0.35- 0.85 B . . . 0.01 . . . . . . . . .
    Grade N06059 59 Ni-Cr-Mo 0.1- 0.4 0.010 max 22.0- 24.0 0.5 max 1.5 max 0.5 max balance 0.015 max 0.10 max . .  0.3 max 15.0- 16.5 0.010 max . . . . . . . . .
    Grade N06625 625C Ni-Cr-Mo-Cb 0.40 max 0.10† 20.0- 23.0 . . . 5.0 max 0.50 58.0 min 0.015 0.50 max 0.40 max 1.00 max 8.0- 10.0 0.015 . . . . . . 3.2- 4.2
    Grade N06686 686 Ni-Cr-Mo-W . . . 0.010 max 19.0- 23.0 . . . 5.0 max 0.75 max balance 0.04 max 0.08 max 0.02- 0.25 15.0- 17.0 0.02 max . . . 3.0- 4.4 . . .
    • (A) Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100.
    • (B) Cobalt is to be counted as nickel.
    • (C) Alloy 625 material shall be refined using the electroslag remelting process (ESR), or the vacuum arc remelting process (VAR).

    ASTM F468/F468M Aluminum-Base AlloysA

    UNS Designation Number Alloy General Name AlB Cr Cu Fe, max Mn, max Si, max Ti, max Zn, max Mg Other Elements, max
    Each Total
    Grade A92024 2024 Aluminum 2024 balance 0.10 max 3.8-4.9 0.50 0.30-0.9 0.50 0.15C 0.25 1.2-1.8 0.05 0.15
    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
    Grade A97075 7075 Aluminum 7075 balance 0.18-0.35 1.2-2.0 0.50 0.30 0.40 0.20D 5.1-6.1 2.1-2.9 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) Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100.
    • (C) Titanium + zirconium 0.20 %, max.
    • (D) Titanium + zirconium 0.25 %, max.

    ASTM F468/F468M Titanium and Titanium-Base AlloysA

    UNS
    Designation
    Number    		 Alloy General
    Name    		 Al C Fe Ti H N O Pd V Cr Mo Zr Sn Si Ru ResidualsB
    Each, max Total, max
    Grade R50250 1 Titanium Gr 1 . . . 0.10 0.20 balance 0.0125 0.05 0.18 . . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R50400 2 Titanium Gr 2 . . . 0.10 0.30 balance 0.0125 0.05 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R50700 4 Titanium Gr 4 . . . 0.10 0.50 balance 0.0125 0.07 0.40 . . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R56400 5C Titanium Gr 5C 5.5-
    6.75    		 0.10 0.40 balance 0.0125 0.05 0.20 . . . 3.5-
    4.5    		 . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R56401 23 Titanium Ti-6Al-4V ELI 5.5-
    6.5    		 0.08 0.25 balance 0.0125 0.05 0.13 . . . 3.5-
    4.5    		 . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R52400 7 Titanium Gr 7 . . . 0.10 0.30 balance 0.0125 0.05 0.25 0.12-
    0.25    		 . . . . . . . . . . . . . . . . . . . . . 0.1 0.4
    Grade R58640 19 Titanium Ti-38-6-44 3.0-
    4.0    		 0.05 0.30 balance 0.0200 0.03 0.12 0.10D 7.5-
    8.5    		 5.5-
    6.5    		 3.5-
    4.5    		 3.5-
    4.5    		 . . . . . . 0.10D 0.15 0.4
    Grade R55111 32 Titanium Ti-5-1-1-1 4.5-
    5.5    		 0.08 0.25 balance 0.0125 0.03 0.11 . . . 0.6-
    1.4    		 . . . 0.6-
    1.2    		 0.6-
    1.4    		 0.6-
    1.4    		 0.06-
    0.14    		 . . . 0.1 0.4
    • (A) All reported values are maximums, unless a range is specified.
    • (B) A residual is an element present in a metal or an alloy in small quantities inherent to the manufacturing process but not added intentionally. Residual elements need not be reported unless a report is specifically required by the purchaser.
    • (C) Identical chemical requirements apply to both Class A and B as defined in Table 2 and 6.5.
    • (D) Ruthenium and palladium, or both, may be added to Grade 19 for enhanced corrosion resistance as negotiated between purchaser and vendor. Chemical analysis is not required unless specifically required by the purchaser.

    ASTM F468/F468M Mechanical Requirements

    Alloy Mechanical Property Marking Nominal Thread Diameter, in. HardnessA Full-Size TestsB Machined Specimen Tests
    Tensile Strength, ksi Yield Strength, min, ksiC Tensile Strength, min, ksi Yield Strength min, ksiC Elongation in 4D, min, %D
    Alloy Cu 110 F468A All 65-90 HRB 30-50 10 30 10 15
    Alloy Cu 260 F468AB All 55-80 HRB 60-90 50 55 50 35
    Alloy Cu 270 F468B All 55-80 HRB 60-90 50 55 50 35
    Alloy Cu 462 F468C All 65-90 HRB 50-80 25 50 25 20
    Alloy Cu 464 F 468D All 55-75 HRB 50-80 15 50 15 25
    Alloy Cu 510 F468E All 60-95 HRB 60-90 35 55 30 15
    Alloy Cu 613 F 468F 0.250-0.500 70-95 HRB 80-110 50 80 50 30
    0.625-1.500 70-95 HRB 75-105 45 75 45 30
    Alloy Cu 630 F468H All 85-100 HRB 100-130 50 100 50 5
    Alloy Cu 642 468J All 75-95 HRB 75-110 35 75 35 10
    Alloy Cu 630 F468H All 85-100 HRB 100-130 50 100 50 5
    Alloy Cu 642 468J All 75-95 HRB 75-110 35 75 35 10
    Alloy Cu 651 F 468K 0.250 to 0.750 75-95 HRB 70-100 55 70 53 8
    0.875-1.500 70-95 HRB 55-90 40 54 38 8
    Alloy Cu 655 F468L All 60-80 HRB 50-80 20 50 15 20
    Alloy Cu 661 F468M All 75-95 HRB 70-100 35 70 35 15
    Alloy Cu 675 F468N All 60-90 HRB 55-85 25 55 25 20
    Alloy Cu 710 F468P All 50-85 HRB 45-75 15 45 15 40
    Alloy Cu 715 F468R All 60-95 HRB 55-85 20 55 20 45
    Alloy Ni 59 Grade 1 F468FN All 21-45 HRC 120-165 85 120 85 20
    Alloy Ni 59 Grade 2 F468GN All 23-47 HRC 135-185 125 135 125 20
    Alloy Ni 59 Grade 3 F468HN All 25-49 HRC 160-200 150 160 150 20
    Alloy Ni 59 Grade 4 F468JN All 80 HRB-25 HRC 100-145 45 100 45 25
    Alloy 276 F468T All 20-32 HRC 110-140 45 110 45 25
    Alloy Ni 400 F 468U 0.250 to 0.750 75 HRB-25 HRC 80-130 40 80 40 20
    0.875 to 1.500 60 HRB-25 HRC 70-130 30 70 30 20
    Alloy Ni 400 F468U4 0.875 to 1.500 75 HRB-25 HRC 80-130 40 80 40 20
    Alloy Ni 400 HFE F468HF All 60-95 HRB 70-120 30 70 30 20
    Alloy Ni 405 F468V All 60 HRB-20 HRC 70-125 30 70 30 20
    Alloy Ni 500 F 468W 0.250 to 0.875 24-37 HRC 130-180 90 130 90 20
    1.000 to 1.500 24-37 HRC 130-180 85 130 58 20
    Alloy Ni 625 F468AC All 85 HRB-35 HRC 120 60 120 60 30
    Alloy Ni 686 Grade 1 F468BN All 21-45 HRC 120-165 85 120 85 20
    Alloy Ni 686 Grade 2 F468CN All 23-47 HRC 135-185 125 135 125 20
    Alloy Ni 686 Grade 3 F468DN All 25-49 HRC 160-200 150 160 150 20
    Alloy Ni 686 Grade 4 F468EN All 65 HRB-25 HRC 100-145 45 100 45 25
    Alloy Al 2024-T4F F468X All 70-85 HRB 55-70 36 62 40 10
    Al 6061-T6F F468Y All 40-50 HRB 37-52 31 42 35 10
    Alloy Al 7075-T73F F468Z All 80-90 HRB 61-76 50 68 56 10
    Alloy Ti 1 F468AT All 140-160 HV 35-70 30 35 25 24
    Alloy Ti 2 F468BT All 160-180 HV 50-85 45 50 40 20
    Alloy Ti 4 F468CT All 200-220 HV 80-115 75 80 70 15
    Alloy Ti 5 Class AH F468DT All 30-39 HRC 130-165 125 130 120 10
    Alloy Ti 5 Class BH F468HT All 30-39 HRC 130-165 125 130 120 10
    Alloy Ti 7 F468ET All 160-180 HV 50-85 45 50 40 20
    Alloy Ti 19 F468FT All 24-38 HRC 115-150 115 120 115 15
    Alloy Ti 23 F468GT All 25-36 HRC 120-165 110 120 110 10
    Alloy Ti-5-1-1-1 F468HT All 24-38 HRC 105-150 90 100 85 10
    • (A) Where both tension and hardness tests are performed, the tension tests shall take precedence for acceptance purposes. For aluminum and titanium alloys, hardness tests are for information only. See 6.5.
    • (B) The yield and tensile strength values for full-size products shall be computed by dividing the yield and maximum tensile load by the stress area for the product diameter and thread pitch as given in table on tensile stress areas.
    • (C) Yield strength is the stress at which an offset of 0.2 % gage length occurs.
    • (D) Elongation is determined using a gage length of 4 diameters of test specimen in accordance with Test Methods E8/E8M.
    • (E) "HF" denotes a hot-formed product.
    • (F) Aluminum alloy temper designations are in accordance with ANSI H35.1.
    • (G) Full-size test mechanical properties apply to fasteners with a maximum diameter of 76 mm. Mechanical properties of larger sections shall be negotiated between the material manufacturer and the fastener producer.
    • (H) Ti 5 Class A requires wedge tensile testing in accordance with Ti 5 Class B requires wedge tensile testing in accordance.

    ASTM F468/F468M Tensile Stress Areas and Threads(Inch)

    Nominal Size, in. Coarse Threads-UNC Fine Threads-UNF 8 Thread Series-8UN
    Threads/ in. Stress AreaA, in.2 Threads/ in. Stress AreaA, in.2 Threads/ in. Stress AreaA, in.2
    1/4 20 0.0318 28 0.0364 . . . . . .
    5/16 18 0.0524 24 0.0580 . . . . . .
    3/18 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 . . . . . .
    11/8 7 0.7630 12 0.8560 8 0.790
    11/4 7 0.9690 12 1.0730 8 1.000
    13/8 6 1.1550 12 1.3150 8 1.233
    11/2 6 1.4050 12 1.5810 8 1.492
    • (A) Tensile stress areas are computed using the following formula:
    • As = 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 F468/F468M Tensile Stress Areas (Metric)

    Nominal Product Diameter and Thread Pitch Stress Area,A mm 2 Nominal Product Diameter and Thread Pitch Stress Area,A mm 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 − 0.9382 P) 2
    • where:
    • As = stress area, mm2,
    • D  = nominal thread diameter, mm, and
    • P  = thread pitch, mm.

    Frequently Asked Questions

    What does ASTM F468 cover?

    ASTM F468 covers commercial wrought nonferrous bolts, hex cap screws and studs from 0.250 to 1.500 in., and socket head cap screws (socket head cap, button head and flat countersunk head) from size 0 (0.060 in.) through 1.500 in., in alloys in common use for general service (1.1). ASTM F468 itself is inch-pound only (1.2.1); its complete metric companion is ASTM F468M (Note 1). Nuts for use with F468 bolts, cap screws and studs are covered by ASTM F467 (1.2).

    Which alloys are in ASTM F468?

    ASTM F468-16 Table 1 lists copper and copper-base alloys 110, 260, 270, 462, 464, 510, 613, 614, 630, 642, 651, 655, 661, 675, 710 and 715; nickel and nickel-base alloys 335, 276, 400, 405, 500, 59, 625 and 686; aluminum alloys 2024-T4, 6061-T6 and 7075-T73; and titanium grades 1, 2, 4, 5, 7, 19, 23 and Ti-5-1-1-1. The alloy number is stated on the order (3.1.4).

    How are F468 fasteners tension tested?

    Fasteners at least the ASTM F606/F606M minimum test length with a breaking load of 120 000 lbf or less are tested full size and meet the full-size tensile and yield values of Table 2 (6.2); larger ones are preferably tested full size, otherwise machined specimens meet the machined-specimen values (6.3). Bolts and cap screws are wedge tested: 10 degrees up to 0.750 in. and 6 degrees above, or 6 and 4 degrees when threaded essentially to the head (6.5). Parts too short for tension testing, except aluminum and titanium, meet the Table 2 hardness instead (6.4); short aluminum parts get a shear test when required: 37 ksi min for 2024-T4, 25 ksi for 6061-T6 and 41 ksi for 7075-T73 (6.4).

    Which dimensions and threads apply?

    Unless otherwise specified, hex cap screws (finished hex bolts) follow ASME B18.2.1 (7.1.1) and socket head cap screws ASME B18.3 (7.1.4); bolt dimensions follow B18.2.1 when specified (7.1.3). ASTM F468 leaves stud dimensions to the purchaser and recognizes continuous thread, double-end clamping (stud bolt, bolt stud) and double-end interference (tap-end stud) types (7.2). Threads are Class 2A per ASME B1.1, gaged to ASME B1.3 system 21; socket head cap screws are Class 3A UNRC/UNRF to 1.000 in. and Class 2A above (7.3).

    How are ASTM F468 fasteners marked?

    Each fastener is marked with a symbol identifying the manufacturer and with the alloy/mechanical property marking of Table 2, raised or depressed (16.1). Each shipping unit is marked with the ASTM designation, alloy number, property marking, size, manufacturer, number of pieces, country of origin and purchase order number (16.3). A certificate of compliance is furnished when the order asks for it (15.1); test reports come with shipment lot testing, Supplementary Requirement S2.

    Which supplementary requirements can be ordered?

    S1 stress corrosion (mercurous nitrate test per ASTM B154 for copper alloys; conductivity-yield criteria for 7075-T73), S2 shipment lot testing, S3 dye penetrant inspection per ASTM E165/E165M, S4 heat control for nickel alloys 400, 405 and 500, and S5 alloy 500 to Federal Specification QQ-N-286. They apply only when the purchaser specifies them.

    What must an ASTM F468 order state?

    Quantity; item name (for alloy 651, hex cap screw dimensions or roll thread body diameter); size (diameter, threads per inch, thread class, length); alloy number, and Class A or B for Ti 5; stress relieving, source inspection and certificates if required; additional and supplementary requirements; and the ASTM designation with date of issue (3.1).

    Does ASTM F468 cover sour service (NACE MR0175)?

    No. ASTM F468 is a specification for general use (1.1) and sets no sour-service limits. Where NACE MR0175 / ISO 15156 is required, state it on the purchase order as an additional requirement (3.1.8).

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