Cross reference · MS (US military standards) · Plate self-locking nut
MS21075 cross referenceSPS MA13600NM, Howmet RFM20X
MS21075 is a plate self-locking nut series on 18 government stock numbers. Its closest equivalents are SPS MA13600NM, Howmet RFM20X. Each one is labeled with how strong the evidence is.
- Issued by MS
- Item Plate self-locking nut
- Stock numbers 18
- Equivalents 11
- DLA paid $0.40 to $44.01
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- MA13600NMSPS TechnologiesCatalog only, needs approvalon 6 of 18 stock numbers, 6 sizes
- RFM20XHowmet Fastening SystemsCatalog only, needs approvalon 5 of 18 stock numbers, 4 sizes
- F52LHTA521MESNACatalog only, needs approvalon 2 of 18 stock numbers, 2 sizes
- MF5000Howmet Fastening SystemsCatalog only, needs approvalon 2 of 18 stock numbers, 2 sizes
5 more on one stock number each: MT65S428SCPC, MT65S832SCPC, MTPH65S832SCPC, MTPHL65S440SCPC, MTPHL65S632SCPC
- MT65S428SCPCCherry AerospaceCatalog only, needs approvalon 1 of 18 stock numbers
- MT65S832SCPCCherry AerospaceCatalog only, needs approvalon 1 of 18 stock numbers
- MTPH65S832SCPCCherry AerospaceCatalog only, needs approvalon 1 of 18 stock numbers
- MTPHL65S440SCPCCherry AerospaceCatalog only, needs approvalon 1 of 18 stock numbers
- MTPHL65S632SCPCCherry AerospaceCatalog only, needs approvalon 1 of 18 stock numbers
Airframer and OEM drawings
2 more on one stock number each: 575R004H, G5310007642396
- 575R004HNorthrop GrummanCatalog only, needs approvalon 1 of 18 stock numbers
- G5310007642396US NavyCatalog only, needs approvalon 1 of 18 stock numbers
Plus 6 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for MS21075
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for MS21075. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 14 of 18 stock numbers, 60 awards from 2023-02-17 to 2026-09-08.
Latest award per stock number: $0.40 to $44.01 each.
DLA production lead time: 91 to 385 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 | MS21075 | MA13600NM | RFM20X | F52LHTA521M | Last DLA price |
|---|---|---|---|---|---|
| 5310-01-367-1801 | MS21075-3 | $0.65 2026-08 | |||
| 5310-01-449-3155 | MS21075-04 | ||||
| 5310-00-764-2392 | MS21075-4 | MA13600NM-048 | RFM20X4 | $1.18 2026-05 | |
| 5310-01-383-0585 | MS21075-06 | $0.55 2025-08 | |||
| 5310-00-764-2394 | MS21075-08 | MA13600NM-82 | RFM20X08 | F52LHTA521M-82 | $1.05 2026-04 |
| 5310-01-603-1370 | MS21075-03N | ||||
| 5310-00-764-2395 | MS21075-04E | MA13600NM-40 | RFM20X04 | $44.01 2024-07 | |
| 5310-01-285-2043 | MS21075-04N | ||||
| 5310-00-764-2396 | MS21075-06E | MA13600NM-62 | RFM20X06 | $1.64 2025-09 | |
| 5310-01-330-9805 | MS21075-06N | $0.55 2025-05 | |||
| 5310-01-326-2180 | MS21075-08E | $1.03 2026-02 | |||
| 5310-01-302-5949 | MS21075-08N | $0.60 2026-05 | |||
| 5310-00-764-2391 | MS21075-3E | MA13600NM-02 | RFM20X3 | F52LHTA521M-02 | $1.42 2026-05 |
| 5310-01-285-2784 | MS21075-3N | $0.40 2026-09 | |||
| 5310-01-341-4125 | MS21075-4E |
Show 3 more sizes
| NSN | MS21075 | MA13600NM | RFM20X | F52LHTA521M | Last DLA price |
|---|---|---|---|---|---|
| 5310-01-285-2785 | MS21075-4N | $0.73 2026-05 | |||
| 5310-00-777-6253 | MS21075-5E | MA13600NM-054 | $7.49 2025-08 | ||
| 5310-01-362-0725 | MS21075-5N | $2.62 2025-06 |
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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