Cross reference · MS (US military standards) · Plate self-locking nut
MS21048 cross referenceHowmet K1031, ESNA LHTA51
MS21048 is a plate self-locking nut series on 20 government stock numbers. Its closest equivalents are Howmet K1031, ESNA LHTA51. Each one is labeled with how strong the evidence is.
- Issued by MS
- Item Plate self-locking nut
- Stock numbers 20
- Equivalents 19
- DLA paid $0.88 to $3.44
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- K1031Howmet Fastening SystemsCatalog only, needs approvalon 13 of 20 stock numbers, 13 sizes
- LHTA51ESNACatalog only, needs approvalon 8 of 20 stock numbers, 9 sizes
- R2000CHowmet Fastening SystemsCatalog only, needs approvalon 6 of 20 stock numbers, 5 sizes
- 12700ESPS TechnologiesCatalog only, needs approvalon 2 of 20 stock numbers, 2 sizes
8 more on one stock number each: 101A, 18090C, BR2000C, K1001, K103, MT65C428CM, NS103202S, R2000C04K
- 101AESNACatalog only, needs approvalon 1 of 20 stock numbers
- 18090CCherry AerospaceCatalog only, needs approvalon 1 of 20 stock numbers
- BR2000CHowmet Fastening SystemsCatalog only, needs approvalon 1 of 20 stock numbers
- K1001Howmet Fastening SystemsCatalog only, needs approvalon 1 of 20 stock numbers
- K103Howmet Fastening SystemsCatalog only, needs approvalon 1 of 20 stock numbers
- MT65C428CMCherry AerospaceCatalog only, needs approvalon 1 of 20 stock numbers
- NS103202SSPS TechnologiesCatalog only, needs approvalon 1 of 20 stock numbers
- R2000C04KHowmet Fastening SystemsCatalog only, needs approvalon 1 of 20 stock numbers
Standards
- NASM21048NASCatalog only, needs approvalon 2 of 20 stock numbers
- AN362WCANCatalog only, needs approvalon 2 of 20 stock numbers, 2 sizes
1 more on one stock number each: NAS1023C
- NAS1023CNASCatalog only, needs approvalon 1 of 20 stock numbers
Airframer and OEM drawings
4 more on one stock number each: 702A, BACN10JR3C, GN10BF, STD820
- 702AHoneywellCatalog only, needs approvalon 1 of 20 stock numbers
- BACN10JR3CBoeingCatalog only, needs approvalon 1 of 20 stock numbers
- GN10BFNorthrop GrummanCatalog only, needs approvalon 1 of 20 stock numbers
- STD820Rolls-RoyceCatalog only, needs approvalon 1 of 20 stock numbers
Plus 13 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for MS21048
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for MS21048. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 4 of 20 stock numbers, 5 awards from 2024-06-13 to 2025-11-04.
Latest award per stock number: $0.88 to $3.44 each.
DLA production lead time: 209 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 | MS21048 | K1031 | LHTA51 | 12700E | NASM21048 | AN362WC | Last DLA price |
|---|---|---|---|---|---|---|---|
| 5310-00-771-7348 | MS21048-3 | K1031-3BAC | |||||
| 5310-00-771-7345 | MS21048-04 | K1031-04 | LHTA51-2860-40 | ||||
| 5310-00-771-7349 | MS21048-4 | ||||||
| 5310-00-771-7350 | MS21048-5 | K1031-5 | |||||
| 5310-00-771-7346 | MS21048-06 | K1031-06 | LHTA51-2860-62 | ||||
| 5310-00-771-7351 | MS21048-6 | K1031-6 | |||||
| 5310-00-772-3706 | MS21048-7 | K1031-7 | |||||
| 5310-00-771-7347 | MS21048-08 | K1031-08 | LHTA51-2860-82 | $0.88 2024-11 | |||
| 5310-01-155-1894 | MS21048-8 | ||||||
| 5310-00-543-3825 | MS21048-06K | K1031-06BC | LHTA51-2860-62BC | ||||
| 5310-00-772-3952 | MS21048-08K | K1031-08BC | LHTA51-2860-82BC | ||||
| 5310-01-676-6288 | MS21048-08W | ||||||
| 5310-00-772-3962 | MS21048-3K | K1031-3BC | LHTA51-2860-02BC | NASM21048 | $2.64 2025-11 | ||
| 5310-00-275-4352 | MS21048-3W | AN362WC1032 | $3.44 2025-07 | ||||
| 5310-00-772-3964 | MS21048-4K | K1031-4BC | LHTA51-2860-048BC |
Show 5 more sizes
| NSN | MS21048 | K1031 | LHTA51 | 12700E | NASM21048 | AN362WC | Last DLA price |
|---|---|---|---|---|---|---|---|
| 5310-00-061-8297 | MS21048-4W | LHTA51-2860P-048 | |||||
| 5310-01-068-7904 | MS21048-5W | K1031-5P | AN362WC524 | ||||
| 5310-00-227-7485 | MS21048-6W | K1031-6P | |||||
| 5310-01-090-9091 | MS21048-L08K | 12700E-82BC | |||||
| 5310-00-766-6651 | MS21048-L4 | 12700E-048 | NASM21048 | $1.17 2025-08 |
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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