Cross reference · SPS Technologies · Extended washer self-locking nut
FN12A cross referenceHi-Shear MN16, ESNA RM22LH, MS21042
FN12A is a SPS extended washer self-locking nut series on 6 government stock numbers. Its closest equivalents are Hi-Shear MN16, ESNA RM22LH, MS21042. Each one is labeled with how strong the evidence is.
- Issued by SPS Technologies
- Item Extended washer self-locking nut
- Stock numbers 6
- Equivalents 20
- DLA paid $0.20 to $1.35
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- MN16Hi-ShearCatalog only, needs approvalon 2 of 6 stock numbers, 2 sizes
- RM22LHESNACatalog only, needs approvalon 2 of 6 stock numbers, 2 sizes
10 more on one stock number each: H10X, H14L02CW, H14L04CW, H14L06CW, T98624CPC, T98S428CPC, T98S440CPC, T98S524CPC, T98S524CPF, T98S624CPF
- H10XHowmet Fastening SystemsCatalog only, needs approvalon 1 of 6 stock numbers
- H14L02CWHowmet Fastening SystemsCatalog only, needs approvalon 1 of 6 stock numbers
- H14L04CWHowmet Fastening SystemsCatalog only, needs approvalon 1 of 6 stock numbers
- H14L06CWHowmet Fastening SystemsCatalog only, needs approvalon 1 of 6 stock numbers
- T98624CPCCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
- T98S428CPCCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
- T98S440CPCCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
- T98S524CPCCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
- T98S524CPFCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
- T98S624CPFCherry AerospaceCatalog only, needs approvalon 1 of 6 stock numbers
Standards
- MS21042MSCatalog only, needs approvalon 6 of 6 stock numbers, 5 sizes
- NAS679XNASCatalog only, needs approvalon 2 of 6 stock numbers
5 more on one stock number each: NAS1291X, MS20364, MS21042C, AN364, AN364C
- NAS1291XNASCatalog only, needs approvalon 1 of 6 stock numbers
- MS20364MSCatalog only, needs approvalon 1 of 6 stock numbers
- MS21042CMSCatalog only, needs approvalon 1 of 6 stock numbers
- AN364ANCatalog only, needs approvalon 1 of 6 stock numbers
- AN364CANCatalog only, needs approvalon 1 of 6 stock numbers
Airframer and OEM drawings
1 more on one stock number each: GN510B
- GN510BNorthrop GrummanCatalog only, needs approvalon 1 of 6 stock numbers
Plus 46 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for FN12A
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for FN12A. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 6 of 6 stock numbers, 98 awards from 2023-01-03 to 2026-06-29.
Latest award per stock number: $0.20 to $1.35 each.
DLA production lead time: 97 to 467 days.
Per size in the table below.
DLA prices at DLA quantities, not a quote.Source
DLA award prices at DLA quantities and terms, not a commercial quote. Each award may bundle packaging, delivery and inspection terms that a commercial buy does not. Vendors are shown by CAGE code only.
Source: DLA FOIA Electronic Reading Room ↗, public FOIA releases. Files: 2023ContHist.zip/2023ContractHistory.txt, 2024ContHist.zip/2024ContractHistory.txt, contracthist2025.zip/contracthist2025.txt, 2026-09-16-1038_contracthist.zip/2026-09-16-1038_contracthist.txt.
Sizes by maker
| NSN | FN12A | MN16 | RM22LH | H10X | T98624CPC | MS21042 | Last DLA price |
|---|---|---|---|---|---|---|---|
| 5310-00-058-1823 | FN12A-26 | RM22LH1660-26 | MS21042-02 | $1.35 2026-06 | |||
| 5310-00-811-6419 | FN12A-40 | RM22LH1660-40 | MS21042-04 | $0.30 2026-06 | |||
| 5310-00-807-1468 | FN12A-048 | MN16-4 | MS21042-428 | $0.20 2026-06 | |||
| 5310-00-807-1469 | FN12A054 | MS21042-5 | $0.68 2026-05 | ||||
| 5310-00-807-1465 | FN12A-62 | MN16-06 | MS21042-06 | $1.03 2026-01 | |||
| 5310-00-810-1786 | FN12A-064 | H10X6 | T98624CPC | MS21042-6 | $0.69 2026-04 |
Each row is one National Stock Number and the part numbers DLA FLIS lists on it, as written there. A blank means FLIS lists no part in that series on the stock number, not that the size does not exist.
Sources and how to read this page.Details
Reference numbers the Federal Logistics Information System records against the same National Stock Number. A supply-catalog cross-reference, not an engineering-approved interchangeability: confirm against the controlling drawing or spec before substituting. Only equivalents marked cited have a manufacturer or government document, linked with each.
Source: DLA Federal Logistics Information System, via DLA PUB LOG ↗ (FLIS Data Electronic Reading Room ↗), data as of 2025-03-18 (March 2025 snapshot). Federal supply class 5310 Nuts and washers. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.
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