Cross reference · ESNA · Plate self-locking nut

LHTA517 cross referenceHowmet F2031, MS21062

LHTA517 is a ESNA plate self-locking nut series on 11 government stock numbers. Its closest equivalents are Howmet F2031, MS21062. Each one is labeled with how strong the evidence is.

Equivalents in the government catalog

11 stock numbers

Catalog-only listings need engineering approval before you substitute.

Manufacturers

  • F2031Howmet Fastening SystemsCatalog only, needs approvalon 8 of 11 stock numbers, 8 sizes
  • RF100CHowmet Fastening SystemsCatalog only, needs approvalon 2 of 11 stock numbers, 2 sizes
10 more on one stock number each: RF100C08K, RF100C3K, RF100C3W, RF100C4K, RF100C4W, T66C1032CBC, T66C1032CPWB, T66C428CBC, T66C428CPWB, T66C524C
  • RF100C08KHowmet Fastening SystemsCatalog only, needs approvalon 1 of 11 stock numbers
  • RF100C3KHowmet Fastening SystemsCatalog only, needs approvalon 1 of 11 stock numbers
  • RF100C3WHowmet Fastening SystemsCatalog only, needs approvalon 1 of 11 stock numbers
  • RF100C4KHowmet Fastening SystemsCatalog only, needs approvalon 1 of 11 stock numbers
  • RF100C4WHowmet Fastening SystemsCatalog only, needs approvalon 1 of 11 stock numbers
  • T66C1032CBCCherry AerospaceCatalog only, needs approvalon 1 of 11 stock numbers
  • T66C1032CPWBCherry AerospaceCatalog only, needs approvalon 1 of 11 stock numbers
  • T66C428CBCCherry AerospaceCatalog only, needs approvalon 1 of 11 stock numbers
  • T66C428CPWBCherry AerospaceCatalog only, needs approvalon 1 of 11 stock numbers
  • T66C524CCherry AerospaceCatalog only, needs approvalon 1 of 11 stock numbers

Standards

  • MS21062MSCatalog only, needs approvalon 9 of 11 stock numbers, 9 sizes
3 more on one stock number each: NAS1032C, NAS687C, NASM21062
  • NAS1032CNASCatalog only, needs approvalon 1 of 11 stock numbers
  • NAS687CNASCatalog only, needs approvalon 1 of 11 stock numbers
  • NASM21062NASCatalog only, needs approvalon 1 of 11 stock numbers

Airframer and OEM drawings

    5 more on one stock number each: 33A2765K, 33A27C08K, 33A27C3K, 33A27C4K, GN10BL
    • 33A2765KLockheed MartinCatalog only, needs approvalon 1 of 11 stock numbers
    • 33A27C08KLockheed MartinCatalog only, needs approvalon 1 of 11 stock numbers
    • 33A27C3KLockheed MartinCatalog only, needs approvalon 1 of 11 stock numbers
    • 33A27C4KLockheed MartinCatalog only, needs approvalon 1 of 11 stock numbers
    • GN10BLNorthrop GrummanCatalog only, needs approvalon 1 of 11 stock numbers

    Plus 3 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).

    Get quotes for LHTA517

    Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.

    Install tooling

    SpecLok has no catalog family for LHTA517. Tooling for the equivalents:

    None of the equivalents is in the SpecLok catalog yet.

    What the government paid

    DLA awards on 2 of 11 stock numbers, 6 awards from 2023-03-22 to 2026-04-02.

    Latest award per stock number: $0.95 to $3.45 each.

    DLA production lead time: 63 to 250 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

    11 stock numbers
    Part numbers DLA FLIS lists for LHTA517 and its equivalents, by stock number
    NSNLHTA517F2031MS21062Last DLA price
    5310-00-819-6042LHTA517-2860-02
    5310-00-687-6683LHTA517-2860-048
    5310-00-783-7897LHTA517-2860-054F2031-5MS21062-5
    5310-00-778-9127LHTA517-2860-62F2031-06MS21062-06$0.95 2024-04
    5310-00-778-9124LHTA517-2860-82MS21062-08
    5310-00-779-3605LHTA517-2860-02BCF2031-3BCMS21062-3K$3.45 2026-04
    5310-00-779-3600LHTA517-2860-048BCF2031-4BCMS21062-4K
    5310-00-779-3609LHTA517-2860-054BCF2031-5BCMS21062-5K
    5310-00-778-9123LHTA517-2860-82BCF2031-08BCMS21062-08K
    5310-00-539-5114LHTA517-2860P-02F2031-3PMS21062-3W
    5310-00-557-4672LHTA517-2860P-048F2031-4PMS21062-4W

    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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