Hardware standard

NAS1352

The National Aerospace Standard for socket head cap screws in alloy, corrosion-resistant and heat-resistant steel, with UNRC (coarse) threads.

1,317 NSNs in DLA's catalog cite this spec. See the catalog data

What NAS1352 covers

NAS1352 is titled "Screw, Cap, Socket Head, Undrilled and Drilled, Plain and Self-Locking, Alloy Steel, Corrosion-Resistant Steel and Heat-Resistant Steel, UNRC-3A and UNRC-2A". It is a part standard: the part number itself defines the screw.

Unlike the material and finish specs on this site, almost every NAS1352 NSN in DLA's catalog is a socket head cap screw, and most are coded open to new sources.

What the standard covers

Thread
UNRC (coarse) threads, class 3A and 2A. Distributor data lists the companion standard NAS1351 with UNRF (fine) threads.
Materials
Alloy steel, corrosion-resistant steel and heat-resistant steel.
Options
Undrilled or drilled heads, plain or self-locking.

Status and revisions

NAS1352 is published by the Aerospace Industries Association and is listed as active. In DLA's catalog, references to it carry CAGE 80205.

Typical applications

  • Socket head cap screws account for 1,296 of the 1,317 NSNs that cite NAS1352 in DLA's catalog; the rest are machine screws, internal wrenching bolts and one externally relieved body screw.
  • Passivation is the most common finish on these parts, followed by cadmium with chromate and black oxide.

What a shop needs to supply to NAS1352

  • Make the screw to the full NAS1352 part number and read it against the standard's current revision; the part number carries the configuration.
  • Supply the thread series the standard calls for (UNRC) rather than fine thread; fine-thread equivalents fall under NAS1351.
  • Check the finish callout on the order. Passivation, cadmium with chromate and black oxide all appear on NAS1352 NSNs in DLA's catalog.

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

NAS1352 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).

1,317
NSNs whose catalog record cites NAS1352
87%
coded open to new sources (1,144 NSNs): at least one managing service codes it AMC 1 or 2 with AMSC G
3%
coded for existing or approved sources (36 NSNs)

Most common items

Screw, cap, socket head1,296
Screw, machine14
Bolt, internal wrenching6
Screw, externally relieved body1

Federal supply classes

5305 Screws1,311
5306 Bolts6

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 G1,14487%
Restricted: AMC 3, 4 or 5, or a restrictive AMSC363%
Other acquisition codes756%
No acquisition method in the catalog625%

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

Finishes called out on these parts

  • Passivate (overall) 470
  • Cadmium and chromate (overall) 199
  • Passivate (fastener) 164
  • Oxide (overall) 137
  • Cadmium and chromate (fastener) 128
  • Cadmium (overall) 58
  • Black oxide (overall) 36
  • Oxide (fastener) 30

Sample NSNs that cite NAS1352

Frequently asked questions

What is NAS1352?

A National Aerospace Standard for socket head cap screws, undrilled and drilled, plain and self-locking, in alloy steel, corrosion-resistant steel and heat-resistant steel, with UNRC-3A and UNRC-2A threads.

What is the difference between NAS1351 and NAS1352?

NAS1352 screws have UNRC (coarse) threads, per the standard's title. Distributor data lists NAS1351 screws with UNRF (fine) threads.

Can a new supplier win DLA orders for NAS1352 screws?

Often, on paper. Of 1,317 NSNs that cite NAS1352, 1,144 have at least one managing service coding them AMC 1 or 2 with suffix G, DLA's code for competitive buys with complete data. The solicitation always governs.

How many DLA parts cite NAS1352?

1,317 NSNs in DLA's PUB LOG catalog (release 2026-10-27, 16 hardware and mechanical supply groups).

Related

Sources