ASTM F467/F467M Specifications
ASTM F467 (this page follows ASTM F467-13ε2) covers the requirements for commercial wrought nonferrous nuts 0.250 to 1.500 in. (1/4 to 1 1/2 in.) inclusive in diameter, in a number of alloys in common use and intended for general service applications. Values are in inch-pound units; F467M is the metric companion specification. Applicable bolts, cap screws and studs for use with these nuts are covered by ASTM F468. Unless otherwise specified, nut dimensions are to ASME B18.2.2 and threads are Class 2B to ASME B1.1.
Except as provided in 4.2.3, nuts are furnished in the condition below (4.2.2). When required, stress relieving is specified by the purchaser for all copper alloys and nickel alloys 400 and 405 (4.2.3). Unless otherwise specified, nuts may be hot pressed, cold formed or machined at the manufacturer's option (4.2.1).
When S1 is specified, copper alloy fasteners must show no evidence of cracking after immersion for 30 min in an aqueous solution of mercurous nitrate, tested per ASTM B154. Mercury is a health hazard: mercury vapor detection and removal equipment and rubber gloves are recommended during the test.
When S2 is specified on the order (3.1.6), the manufacturer tests the individual lots for shipment: a chemical analysis of a randomly selected finished nut from each lot (or the starting material analysis, with heat or lot control maintained), and mechanical property tests per this specification and ASTM F1470. A test report with the actual chemical and mechanical results is furnished for each lot (16.2).
When dye penetrant inspection is specified on the purchase order, nuts are tested per ASTM E165 or another mutually acceptable procedure, and conform to acceptance criteria agreed between purchaser and manufacturer.
Applies to alloys 400, 405 and 500 only. When S4 is specified, the manufacturer controls the product by heat analysis and identifies the finished product in each shipment by the actual heat number. S2 is then invoked automatically, and the heat analysis is reported on the test reports.
Nuts are tested in full section (12.2.1) and hardness is taken on the top or bottom face (12.2.2) to ASTM E18 or E92: one reading for 1/4 to 7/16 in., the average of four readings 90 degrees apart for 1/2 in. and larger (13.2.2). Where both proof load and hardness are tested, proof load governs acceptance (6.2).
A lot is up to 100 000 nuts of one type, alloy and temper, diameter and thread series (9.1). Sample size by lot: 50 and under, 2; 51 to 500, 3; 501 to 35 000, 5; 35 001 to 100 000, 8; acceptance number 0, rejection number 1 (10.1).
Proof load is the Table 2 proof stress times the Table 4 tensile stress area (13.2.1). For example, a 1/2-13 UNC hex nut (stress area 0.1419 sq in) in naval brass 462 (50 ksi) must carry 7,095 lbf.
Every nut is marked with the manufacturer's symbol and the alloy/mechanical property marking from Table 2, raised or depressed (17.1), for example F 467C for naval brass 462 or F 467U for Ni-Cu alloy 400. 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 (17.3).
When specified, the manufacturer furnishes a certificate of compliance (16.1); when S2 shipment lot testing is specified, a test report with the mechanical test results for each lot (16.2). Packaging is to ASTM D3951 unless otherwise specified (17.2.1).
Frequently Asked Questions
What is ASTM F467?
ASTM F467 is the Standard Specification for Nonferrous Nuts for General Use. ASTM F467-13ε2 covers commercial wrought nonferrous nuts 0.250 to 1.500 in. inclusive in diameter (1.1), in inch-pound units; F467M is the metric companion (Note 1). It is under ASTM Committee F16 on Fasteners.
Which alloys does ASTM F467 cover?
ASTM F467-13ε2 Table 1 lists 35 wrought alloys: 16 copper-base (C11000, C26000, C27000, C46200, C46400, C51000, C61300, C61400, C63000, C64200, C65100, C65500, C66100, C67500, C71000, C71500), 8 nickel-base (N10001, N10276, N04400, N04405, N05500, N06059, N06625, N06686), 3 aluminum-base (A92024, A96061, A96262) and 8 titanium (R50250, R50400, R50700, R56400, R56401, R52400, R58640, R55111). Table 2 gives hardness, proof stress and marking for each; alloys 59 and 686 have four strength grades and alloy 625 has two.
What is the difference between ASTM F467 and F468?
F467 covers nonferrous nuts. ASTM F468 covers the applicable nonferrous bolts, hex cap screws, socket head cap screws and studs for use with them (1.2).
Which dimensions and threads apply to F467 nuts?
Unless otherwise specified, nut dimensions are to ASME B18.2.2 (7.1) and threads are Class 2B to ASME B1.1 (7.2). Nuts are supplied without any additive chemical or metallic finish unless otherwise specified (8.2).
How is F467 nut strength checked?
By proof load and hardness. Table 2 sets a minimum hardness and a minimum proof stress for hex and heavy hex nuts for each alloy; heavy hex values are 1.08 times the hex value. Proof load (proof stress times the Table 4 stress area) is tested per ASTM F606 and governs acceptance when both tests are made (6.2, 13.2.1).
What are the F467 supplementary requirements?
S1 stress corrosion test for copper alloys (mercurous nitrate, ASTM B154), S2 shipment lot testing with a test report, S3 dye penetrant inspection (ASTM E165), and S4 heat control for alloys 400, 405 and 500. They apply only when the purchaser specifies them.
