Cross reference · Howmet Fastening Systems · Plate self-locking nut
K1031 cross referenceESNA LHTA51, MS21048
K1031 is a Howmet plate self-locking nut series on 14 government stock numbers. Its closest equivalents are ESNA LHTA51, MS21048. Each one is labeled with how strong the evidence is.
- Issued by Howmet Fastening Systems
- Item Plate self-locking nut
- Stock numbers 14
- Equivalents 19
- DLA paid $0.88 to $2.64
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- LHTA51ESNACatalog only, needs approvalon 7 of 14 stock numbers, 8 sizes
10 more on one stock number each: 101A, 18090C, MT65C428CM, NS103202S, T2C1032BC, T2C428BC, T2C524PWB, T2C624PWB, T2C632BC, T2C832BC
- 101AESNACatalog only, needs approvalon 1 of 14 stock numbers
- 18090CCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- MT65C428CMCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- NS103202SSPS TechnologiesCatalog only, needs approvalon 1 of 14 stock numbers
- T2C1032BCCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- T2C428BCCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- T2C524PWBCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- T2C624PWBCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- T2C632BCCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
- T2C832BCCherry AerospaceCatalog only, needs approvalon 1 of 14 stock numbers
Standards
- MS21048MSCatalog only, needs approvalon 13 of 14 stock numbers, 12 sizes
Airframer and OEM drawings
4 more on one stock number each: 702A, BACN10JR3C, GN10BF, STD820
- 702AHoneywellCatalog only, needs approvalon 1 of 14 stock numbers
- BACN10JR3CBoeingCatalog only, needs approvalon 1 of 14 stock numbers
- GN10BFNorthrop GrummanCatalog only, needs approvalon 1 of 14 stock numbers
- STD820Rolls-RoyceCatalog only, needs approvalon 1 of 14 stock numbers
Plus 19 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for K1031
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for K1031. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 2 of 14 stock numbers, 3 awards from 2024-06-13 to 2025-11-04.
Latest award per stock number: $0.88 to $2.64 each.
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 | K1031 | LHTA51 | MS21048 | Last DLA price |
|---|---|---|---|---|
| 5310-00-771-7345 | K1031-04 | LHTA51-2860-40 | MS21048-04 | |
| 5310-00-680-6518 | K1031-4 | |||
| 5310-00-771-7350 | K1031-5 | MS21048-5 | ||
| 5310-00-771-7346 | K1031-06 | LHTA51-2860-62 | MS21048-06 | |
| 5310-00-771-7351 | K1031-6 | MS21048-6 | ||
| 5310-00-772-3706 | K1031-7 | MS21048-7 | ||
| 5310-00-771-7347 | K1031-08 | LHTA51-2860-82 | MS21048-08 | $0.88 2024-11 |
| 5310-00-543-3825 | K1031-06BC | LHTA51-2860-62BC | MS21048-06K | |
| 5310-00-772-3952 | K1031-08BC | LHTA51-2860-82BC | MS21048-08K | |
| 5310-00-771-7348 | K1031-3BAC | MS21048-3 | ||
| 5310-00-772-3962 | K1031-3BC | LHTA51-2860-02BC | MS21048-3K | $2.64 2025-11 |
| 5310-00-772-3964 | K1031-4BC | LHTA51-2860-048BC | MS21048-4K | |
| 5310-01-068-7904 | K1031-5P | MS21048-5W | ||
| 5310-00-227-7485 | K1031-6P | MS21048-6W |
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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