ASTM F467 – Specification

The ASTM F467 specification establishes the standard requirements for commercial wrought nonferrous nuts, covering diameters from 0.250 to 1.500 inches. This specification is intended for general service applications across a wide range of common alloys, including copper, nickel, aluminum, and titanium.

Practical Application & Ordering

To successfully apply this specification to your procurement or manufacturing process, the purchase order must include several technical details to ensure compliance:

  • Quantity and Name: Specify the number of pieces and the item name (e.g., Hex Nut).
  • Size and Thread: Detail the nominal diameter and threads per inch. Unless otherwise specified, dimensions follow ASME B18.2.2 and threads must be Class 6H per ASME B1.1.
  • Alloy Selection: Identify the specific alloy number (e.g., Alloy 270 for brass or Alloy 500 for Ni-Cu-Al).
  • Material Condition: Nuts must be furnished in specific conditions, such as "As formed" for Titanium, "Annealed" for Alloy 625, or "Solution treated and naturally aged" for Aluminum 2024-T4.
  • Stress Relieving: If required for copper alloys or nickel alloys 400 and 405, this must be explicitly specified by the purchaser.

Technical Requirements Overview

The specification mandates rigorous standards for the following:

  • Chemical Composition: Nuts must conform to the specific percentages for each alloy group detailed in Table 1.
  • Mechanical Properties: Components must meet minimum hardness and proof stress requirements. For instance, Nickel Alloy 500 requires a minimum proof stress of 130 ksi and a minimum hardness of 24 HRC.
  • Quality and Workmanship: Finished nuts must be free of injurious burrs, seams, laps, or other imperfections that could affect serviceability.
  • Testing and Sampling: Quality is verified through "Shipment Lot" testing or continuous mass production sampling (Standard Table 3), ensuring that a representative number of pieces meet all specified limits.

Mechanical Properties

To comply with ASTM F467, nuts must meet specific mechanical requirements that ensure structural integrity under service loads. The primary performance indicators are Proof Stress—the minimum stress a fastener must support without permanent deformation—and Hardness, which measures the material's resistance to localized plastic deformation. While both tests are used for quality verification, the proof load test results take precedence for final acceptance if both are performed. For aluminum and titanium alloys, the hardness values listed in Table 2 are provided for information only. Additionally, aluminum alloy 2024-T4 must be supplied in a naturally aged condition and is not recommended for nut sizes exceeding 0.250 inches.

Alloy Mechanical Property Marking Hardness, min Proof Stress, min, ksi
Cu 110 F 467A 65 HRF 30
Cu 270 F 467B 55 HRF 60
Cu 462 F 467C 65 HRB 50
Cu 464 F 467D 55 HRB 50
Cu 510 F 467E 60 HRB 60
Cu 613 F 467F 70 HRB 80
Cu 614 F 467G 70 HRB 75
Cu 630 F 467H 85 HRB 100
Cu 642 F 467J 75 HRB 75
Cu 651 F 467K 75 HRB 70
Cu 655 F 467L 60 HRB 50
Cu 661 F 467M 75 HRB 70
Cu 675 F 467N 60 HRB 55
Cu 710 F 467P 50 HRB 45
Cu 715 F 467R 60 HRB 55
Ni 335 F 467S 20 HRC 115
Ni 276 F 467T 20 HRC 110
Ni 400 F 467U 75 HRB 80
Ni 405 F 467V 60 HRB 70
Ni 500 F 467W 24 HRC 130
Ni 625 F 647AC 85 HRB-35 HRC 60
Ni 686 F 467BN 23 HRC 115
Al 2024-T4 F 467X 70 HRB 55
Al 6061-T6 F 467Y 40 HRB 40
Al 6262-T9 F 467Z 60 HRB 52
Ti 1 F 467AT 140 HV 40
Ti 2 F 467BT 150 HV 55
Ti 4 F 467CT 200 HV 85
Ti 5 F 467DT 30 HRC 135
Ti 7 F 467ET 160 HV 55
Ti-19 F 467FT 24 HRC 120
Ti 23 F 467GT 25 HRC 125
Ti-5-1-1-1 F 467HT 24 HRC 105

Material Properties

The material properties for fasteners under ASTM F467 are defined by both their chemical composition and the thermal or mechanical treatment they receive during manufacturing. This specification categorizes nonferrous alloys into four primary groups: Copper, Nickel, Aluminum, and Titanium, each with stringent elemental limits and required delivery conditions.

  • Chemical Requirements: Nuts must strictly conform to the chemical composition limits specified in Table 1 for the chosen alloy. Any element listed as "balance" is calculated by subtracting the total of all other named elements from 100%.
  • Condition of Manufacture: The final material state (e.g., annealed, solution treated, or as formed) is critical to performance. For example, Nickel Alloy 500 must be solution annealed and aged, while Aluminum 6061-T6 must be solution treated and artificially aged.
  • Stress Relieving: For all copper alloys and nickel alloys 400 and 405, the purchaser has the option to specify stress relieving if required for the application.
  • Certification: While manufacturers typically perform individual analyses of finished nuts, aluminum nut suppliers may instead provide a certificate of conformance to verify chemical compliance.
Alloy Groups
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 alloys: 2024-T4 Solution treated and naturally aged
Aluminum alloys: 6061-T6 Solution treated and artificially aged
Aluminum alloys: 6262-T9 Solution treated, artificially aged, and cold worked
Titanium As formed
625 Annealed
Copper and Copper-Base Alloys Chemical Requirements
Composition, %
UNS Designation Number Alloy General Name Copper, min Aluminum Iron, max Manganese, max Nickel, max Phosphorus Silicon Zinc, maxA Lead, max Tin Arsenic max
C11000 110 ETP copper 99.9
C27000 270 brass 63.0-68.5 0.07 balance 0.10
C46200 462 naval brass 62.0-65.0 0.10 balance 0.20 0.5-1.0
C46400 464 naval brass 59.0-62.0 0.10 balance 0.20 0.5-1.0
C51000 510 phosphor bronze balance 0.10 0.03-0.35 0.30 0.05 4.2-5.8
C61300 613 aluminum bronze B 6.0-7.5 2.0-3.0 0.10 0.15 0.015 0.10 0.05 0.01 0.20-0.50
C61400 614 aluminum bronze 88.00 6.0-8.0 1.5-3.5 1.0 0.50 0.01
C63000 630 aluminum bronze 78.00 9.0-11.0 2.0-4.0 1.5 4.0-5.5 0.25 max 0.50 0.20 max
C64200 642 aluminum silicon bronze 88.65 6.3-7.6 0.30 0.10 0.25 1.5-2.25 0.50 0.05 0.20 0.15
C65100 651 silicon bronze 96.00 0.8 0.7 0.8-2.0 1.5 0.05
C65500 655 silicon bronze 94.80 0.8 1.5 0.6 2.8-3.8 1.5 0.05
C66100 661 silicon bronze 94.00 0.25 1.5 2.8-3.5 1.5 0.20-0.8
C67500 675 manganese bronze 57.0-60.0 0.25 max 0.8-2.0 0.05-0.5 balance 0.20 0.5-1.5
C71000 710 cupro-nickel 74.00 0.60 1.00 19.0-23.00 1.00 0.05
C71500 715 cupro-nickel 65.00 0.40-0.7 1.00 29.0-33.00 1.00 0.05
Nickle and Nickle-Base Alloys Chemical Requirements
Composition, %
UNS Designation Number Alloy General Name Aluminum Carbon, max Chromium Copper Iron, max Manganese, max Nickel Phosphorus, max Silicon, max Titanium Cobalt, max Molybdenum Sulfur, max Vanadium Tungsten
N10001 335 NiMo 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
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
N04400 400 Ni-Cu Class A 0.3 balance 2.5 max 2.0 63.0-70.0 0.5 max 0.024
N04405 405 Ni-Cu Class B 0.3 balance 2.5 max 2.0 63.0-70.0 0.5 max 0.025-0.060
N05500 500 Ni-Cu-Al 2.30-3.15 0.25 balance 2.0 max 1.5 63.0-70.0 0.5 max 0.35-0.85 0.01
N06625 625 Ni-Cr-Mo-Cb 0.40 max 0.10 max 20.0-23.0 5.0 max 0.50 max 58.0 min 0.015 max 0.50 max 0.40 max 1.00 max 8.0-10.0 0.015
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
Aluminum Base Alloys Chemical Requirements
Composition, %
UNS Designation Number Alloy General Name Aluminum Chromium Copper Iron, max Manganese, max Silicon, max Titanium, max Zinc, max Magnesium Other Elements (Each), max Other Elements (Total), max
A92024 2024 Aluminum 2024 balance 0.10 max 3.8-4.9 0.50 0.30-0.9 0.50 0.15B 0.25 1.2-1.8 0.05 0.15
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
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 0
Titanium and Titanium-Base Alloys
Composition, %
UNS Designation Number Alloy General Name Aluminum Carbon Iron Titanium Hydrogen Nitrogen Oxygen Palladium Vanadiun Chromium Molybdenum Zirconium Tin Silicon Rutherium Residuals (Total), max Residuals (Each), max
R50250 1 Titanium Gr 1 0.10 0.20 balance 0.0125 0.05 0.18 0.4 0.1
R50400 2 Titanium Gr 2 0.10 0.30 balance 0.0125 0.05 0.25 0.1
R50700 4 Titanium Gr 4 0.10 0.50 balance 0.0125 0.07 0.40 0.1
R56400 5 Titanium Gr 5 5.5-6.75 0.10 0.40 balance 0.0125 0.05 0.20 3.5-4.5 0.1
R56401 23 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
R52400 7 Titanium Gr 7 0.10 0.30 balance 0.0125 0.05 0.25 0.12-0.25 0.4 0.1
R58640 19 Ti-38-6-44 3.0-4.0 0.05 0.30 balance 0.0200 0.03 0.12 7.5-8.5 5.5-6.5 3.5-4.5 3.5-4.5 0.10 0.4 0.1
R55111 32 Ti-5-1-1-1 4.5-5.5 0.08 0.25 balance 0.0125 0.03 0.11 0.104 0.6-1.4 0.6-1.2 0.6-1.4 0.06-0.14 0.6-1.4 0.4 0.1