Cross reference · Howmet Fastening Systems · Plate self-locking nut
MK4000 cross referenceSPS NS103200, ESNA RMA9209M, Cherry T8079S, MS21086
MK4000 is a Howmet plate self-locking nut series on 4 government stock numbers. It is cross-referenced to SPS NS103200, ESNA RMA9209M, Cherry T8079S, MS21086. Each one is labeled with how strong the evidence is.
- Issued by Howmet Fastening Systems
- Item Plate self-locking nut
- Stock numbers 4
- Cross-referenced series 12
Series in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- NS103200SPS TechnologiesCatalog only, needs approvalon 2 of 4 stock numbers, 2 sizes
- RMA9209MESNACatalog only, needs approvalon 2 of 4 stock numbers, 2 sizes
- T8079SCherry AerospaceCatalog only, needs approvalon 2 of 4 stock numbers, 2 sizes
5 more on one stock number each: M12640, M12640NM, MA12640, MT13S428CPC, MT13S832BC
- M12640SPS TechnologiesCatalog only, needs approvalon 1 of 4 stock numbers
- M12640NMSPS TechnologiesCatalog only, needs approvalon 1 of 4 stock numbers
- MA12640SPS TechnologiesCatalog only, needs approvalon 1 of 4 stock numbers
- MT13S428CPCCherry AerospaceCatalog only, needs approvalon 1 of 4 stock numbers
- MT13S832BCCherry AerospaceCatalog only, needs approvalon 1 of 4 stock numbers
Standards
2 more on one stock number each: MS21086, MS21086L08K
- MS21086MSCatalog only, needs approvalon 1 of 4 stock numbers
- MS21086L08KMSCatalog only, needs approvalon 1 of 4 stock numbers
Airframer and OEM drawings
2 more on one stock number each: BACN10JP3D, BACN10JP5D
- BACN10JP3DBoeingCatalog only, needs approvalon 1 of 4 stock numbers
- BACN10JP5DBoeingCatalog only, needs approvalon 1 of 4 stock numbers
Plus 5 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for MK4000
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for MK4000. Tooling for the cross-referenced series:
None of these series is in the SpecLok catalog yet.
Sizes by maker
| NSN | MK4000 | NS103200 | RMA9209M | T8079S | MS21086 | BACN10JP3D | Last DLA price |
|---|---|---|---|---|---|---|---|
| 5310-00-670-1207 | MK4000-5 | NS103200-054 | RMA9209M-5 | T8079S524 | |||
| 5310-00-151-5414 | MK4000-08BC | ||||||
| 5310-01-040-4730 | MK4000-3BAC | NS103200-02 | RMA9209M-3 | T8079S1032 | BACN10JP3D | ||
| 5310-00-150-3770 | MK4000-4CW | MS21086-4 |
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.
Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers
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Quote MK4000 or an equivalent
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