Material specification

AMS 4928

SAE's material specification for annealed 6Al-4V titanium alloy bars, wire, forgings, flash-welded rings and drawn shapes.

6,540 NSNs in DLA's catalog cite this spec. See the catalog data

What AMS 4928 covers

AMS 4928 is titled "Titanium Alloy Bars, Wire, Forgings, Flash-Welded Rings, and Drawn Shapes, 6Al - 4V, Annealed".

The current revision covers product up through 10.000 inches (254.00 mm) in diameter or least distance between parallel sides.

Product forms and related specs

Product forms
Bars, wire, forgings, flash-welded rings and drawn shapes.
Condition
Annealed.
AMS 4967
A separate SAE spec for 6.0Al-4.0V titanium bars, wire, forgings and rings, titled "Annealed, Heat Treatable". Its current revision, N, covers product up through 4.000 inches. Some DLA records cite both specs.

Status and revisions

AMS 4928 was first issued in July 1957. The current revision is AMS 4928X, revised 20 October 2025; revision W was dated 7 December 2017.

Typical applications

  • Pin-rivets dominate DLA's catalog for this spec, followed by close-tolerance screws, blind rivets and shear bolts.
  • Smaller counts of shoulder bolts, studs, tube fittings and gas turbine compressor parts.
  • Aluminum coatings and anodize are the finishes most often called out with it in the catalog.

What a shop needs to supply to AMS 4928

  • Buy material certified to AMS 4928 at the revision the order names, and check that revision's size range against your stock size.
  • Do not substitute AMS 4967 or another titanium spec without the buyer's approval; they are separate documents with different titles and scopes.
  • Expect source restrictions on many of these parts. In DLA's catalog more NSNs that cite AMS 4928 are coded for existing or approved sources than are coded open.

The purchase order, drawing and the revision of the spec it invokes govern. Always work from the revision your contract names.

AMS 4928 in the DLA catalog

From DLA's public PUB LOG catalog, release 2026-10-27, covering 16 hardware and mechanical supply groups (fasteners, bearings, fittings, valves, power transmission, engine components and more).

6,540
NSNs whose catalog record cites AMS 4928
18%
coded open to new sources (1,199 NSNs): at least one managing service codes it AMC 1 or 2 with AMSC G
59%
coded for existing or approved sources (3,871 NSNs)

Most common items

Pin-rivet3,814
Screw, close tolerance815
Rivet, blind594
Bolt, shear586
Bolt, close tolerance93
Screw, shoulder89
Bolt, shoulder50
Bolt, machine49
Stud, shouldered46
Spacer, compressor vane assembly,28

Federal supply classes

5320 Rivets4,431
5305 Screws931
5306 Bolts783
4730 Hose, pipe, tube, lubrication, and railing fittings102
2840 Gas turbines and jet engines, aircraft, prime moving; and components66
5310 Nuts and washers52
5307 Studs46
5340 Hardware, commercial43

Can a new source win these parts?

DLA codes each part with an acquisition method (AMC) and a suffix (AMSC). We count an NSN as open when at least one managing service codes it AMC 1 or 2 (competitive) with suffix G (the government has the full technical data and the rights to use it). Otherwise we count it as restricted when a service codes it AMC 3, 4 or 5 (buy from the manufacturer or prime) or uses a suffix that limits or conditions who can supply it (AMSC B, C, D, H, K, L, P, Q, R, T, U or Y): missing data or rights, source-control drawings, source or QPL approval, controlled castings, uneconomical breakout, an unstable design, or low-value screening for known sources. These are catalog codes; the solicitation always governs.

Open: AMC 1 or 2 with AMSC G1,19918%
Restricted: AMC 3, 4 or 5, or a restrictive AMSC3,87159%
Other acquisition codes1,10317%
No acquisition method in the catalog3676%

As of PUB LOG release 2026-10-27. How to read the codes: AMC and AMSC codes explained.

How catalog records call it out

Characteristic records that cite AMS 4928, grouped by the type, class or condition they name. Counted across the most common callout spellings, so the totals are a floor.

Not specified6,722

Finishes called out on these parts

  • Aluminum (overall) 1,531
  • Anodize (overall) 300
  • Passivate (sleeve) 252
  • Phosphate (overall) 87
  • Passivate (bolt) 85
  • Aluminum alloy (overall) 73
  • Passivate (stem) 65
  • Cadmium (overall) 30

Sample NSNs that cite AMS 4928

Titanium machine shops in the directory

42 listed shops report this capability. Confirm the spec, revision and any approvals with the shop before you order.

See all titanium machine shops

Frequently asked questions

What is AMS 4928?

An SAE specification for annealed 6Al-4V titanium alloy bars, wire, forgings, flash-welded rings and drawn shapes.

What is the current revision of AMS 4928?

AMS 4928X, revised 20 October 2025. It covers product up through 10.000 inches.

What is the difference between AMS 4928 and AMS 4967?

Both cover 6Al-4V titanium. AMS 4928 is titled annealed and includes drawn shapes, up through 10.000 inches in revision X. AMS 4967 is titled annealed, heat treatable and covers bars, wire, forgings and rings up through 4.000 inches in revision N. Use the one your drawing names.

How many DLA parts cite AMS 4928?

6,540 NSNs in DLA's PUB LOG catalog (release 2026-10-27, 16 hardware and mechanical supply groups). Pin-rivets account for 3,814 of them.

Related

Sources