Cross reference · MS (US military standards) · Plate self-locking nut
MS21055 cross referenceSPS 12620NM, ESNA F52LHTA, Howmet R3000X
MS21055 is a plate self-locking nut series on 8 government stock numbers. Its closest equivalents are SPS 12620NM, ESNA F52LHTA, Howmet R3000X. Each one is labeled with how strong the evidence is.
- Issued by MS
- Item Plate self-locking nut
- Stock numbers 8
- Equivalents 13
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- 12620NMSPS TechnologiesCatalog only, needs approvalon 6 of 8 stock numbers, 6 sizes
- F52LHTAESNACatalog only, needs approvalon 5 of 8 stock numbers, 5 sizes
- R3000XHowmet Fastening SystemsCatalog only, needs approvalon 3 of 8 stock numbers, 3 sizes
- K3000Howmet Fastening SystemsCatalog only, needs approvalon 2 of 8 stock numbers, 2 sizes
8 more on one stock number each: 1620NM, 52LHTA, F2LHTA, R3000X3K, T7S1032BCCPC, T7S1032CPC, T7S428CPC, T7S524CPC
- 1620NMSPS TechnologiesCatalog only, needs approvalon 1 of 8 stock numbers
- 52LHTAESNACatalog only, needs approvalon 1 of 8 stock numbers
- F2LHTAESNACatalog only, needs approvalon 1 of 8 stock numbers
- R3000X3KHowmet Fastening SystemsCatalog only, needs approvalon 1 of 8 stock numbers
- T7S1032BCCPCCherry AerospaceCatalog only, needs approvalon 1 of 8 stock numbers
- T7S1032CPCCherry AerospaceCatalog only, needs approvalon 1 of 8 stock numbers
- T7S428CPCCherry AerospaceCatalog only, needs approvalon 1 of 8 stock numbers
- T7S524CPCCherry AerospaceCatalog only, needs approvalon 1 of 8 stock numbers
Standards
1 more on one stock number each: NASM25027
- NASM25027NASCatalog only, needs approvalon 1 of 8 stock numbers
Plus 1 reference number whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for MS21055
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for MS21055. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
Sizes by maker
| NSN | MS21055 | 12620NM | F52LHTA | R3000X | T7S1032BCCPC | NASM25027 | Last DLA price |
|---|---|---|---|---|---|---|---|
| 5310-00-779-3513 | MS21055-3 | 12620NM-02 | R3000X3 | ||||
| 5310-00-779-3514 | MS21055-4 | 12620NM-48 | F52LHTA55-048 | R3000X4 | |||
| 5310-00-779-3515 | MS21055-5 | F52LHTA55-054 | |||||
| 5310-01-658-1659 | MS21055-5 | ||||||
| 5310-00-779-3511 | MS21055-06 | 12620NM-62 | F52LHTA55-62 | ||||
| 5310-00-779-3517 | MS21055-6 | 12620NM-064 | |||||
| 5310-00-779-3512 | MS21055-08 | 12620NM-82 | F52LHTA55-82 | R3000X08 | NASM25027 | ||
| 5310-00-778-9199 | MS21055-3K | 12620NM-02BC | F52LHTA55-02BC | T7S1032BCCPC |
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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