Cross reference · MS (US military standards) · Setscrew

MS51021 cross referenceFFS200

MS51021 is a setscrew series on 83 government stock numbers. Its closest equivalents are FFS200. Each one is labeled with how strong the evidence is.

Equivalents in the government catalog

83 stock numbers

Catalog-only listings need engineering approval before you substitute.

Manufacturers

    1 more on one stock number each: LL57XD40J
    • LL57XD40JLong-LokCatalog only, needs approvalon 1 of 83 stock numbers

    Standards

    • FFS200Federal specificationsCatalog only, needs approvalon 35 of 83 stock numbers, 2 sizes
    • NASM51021NASCatalog only, needs approvalon 5 of 83 stock numbers, 2 sizes
    • FFS103TYPE3STYLEFederal specificationsCatalog only, needs approvalon 4 of 83 stock numbers
    • AN565DC6HANCatalog only, needs approvalon 2 of 83 stock numbers, 2 sizes
    • AN565DC832HANCatalog only, needs approvalon 2 of 83 stock numbers, 2 sizes
    7 more on one stock number each: NAS1081C08D3P, NASM565DC6L, AN565A416H, AN565AC4H, AN565DC10H, AN565DC2H, AN565DC4L
    • NAS1081C08D3PNASCatalog only, needs approvalon 1 of 83 stock numbers
    • NASM565DC6LNASCatalog only, needs approvalon 1 of 83 stock numbers
    • AN565A416HANCatalog only, needs approvalon 1 of 83 stock numbers
    • AN565AC4HANCatalog only, needs approvalon 1 of 83 stock numbers
    • AN565DC10HANCatalog only, needs approvalon 1 of 83 stock numbers
    • AN565DC2HANCatalog only, needs approvalon 1 of 83 stock numbers
    • AN565DC4LANCatalog only, needs approvalon 1 of 83 stock numbers

    Airframer and OEM drawings

    • 709084PCUS NavyCatalog only, needs approvalon 2 of 83 stock numbers, 2 sizes
    • HP922RHoneywellCatalog only, needs approvalon 2 of 83 stock numbers, 2 sizes
    10 more on one stock number each: 12Z1077PC, 335C677A0632D, A03935, A03936, A05265, A05266, A05744, A06423, A07997, A09039
    • 12Z1077PCUS NavyCatalog only, needs approvalon 1 of 83 stock numbers
    • 335C677A0632DNorthrop GrummanCatalog only, needs approvalon 1 of 83 stock numbers
    • A03935MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A03936MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A05265MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A05266MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A05744MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A06423MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A07997MBDACatalog only, needs approvalon 1 of 83 stock numbers
    • A09039MBDACatalog only, needs approvalon 1 of 83 stock numbers

    Plus 76 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).

    Get quotes for MS51021

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

    Install tooling

    SpecLok has no catalog family for MS51021. Tooling for the equivalents:

    None of the equivalents is in the SpecLok catalog yet.

    What the government paid

    DLA awards on 19 of 83 stock numbers, 47 awards from 2023-01-30 to 2026-08-12.

    Latest award per stock number: $0.14 to $9.45 each.

    DLA production lead time: 37 to 339 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

    83 stock numbers
    Part numbers DLA FLIS lists for MS51021 and its equivalents, by stock number
    NSNMS51021FFS200Last DLA price
    5305-00-843-2841MS51021-1
    5305-00-850-7670MS51021-2
    5305-00-619-4577MS51021-3
    5305-00-045-1684MS51021-9
    5305-00-800-7261MS51021-9
    5305-00-655-9246MS51021-10$0.19 2026-08
    5305-00-543-5832MS51021-11
    5305-00-877-8743MS51021-12$0.90 2025-08
    5305-00-819-3149MS51021-13$0.73 2024-08
    5305-00-980-4196MS51021-14
    5305-00-619-4580MS51021-15
    5305-00-576-7266MS51021-22
    5305-00-272-4123MS51021-23$0.46 2024-08
    5305-00-639-6860MS51021-24
    5305-00-282-8902MS51021-25FFS200
    Show 45 more sizes
    More sizes
    NSNMS51021FFS200Last DLA price
    5305-00-551-0156MS51021-31
    5305-00-281-3118MS51021-32
    5305-00-230-7465MS51021-33$0.73 2025-10
    5305-00-638-2260MS51021-34$0.64 2023-03
    5305-00-082-6782MS51021-36
    5305-00-753-4451MS51021-42
    5305-00-531-8340MS51021-43
    5305-00-297-4003MS51021-44
    5305-00-821-3597MS51021-45$0.20 2025-02
    5305-00-272-4159MS51021-47$0.14 2023-12
    5305-00-242-7251MS51021-48FFS200
    5305-00-877-8739MS51021-49$1.55 2023-09
    5305-00-316-3401MS51021-50
    5305-00-902-7826MS51021-55
    5305-00-817-6139MS51021-56FF-S-200
    5305-00-638-8691MS51021-57
    5305-00-638-8753MS51021-58FFS200
    5305-00-809-9385MS51021-60
    5305-00-143-3168MS51021-61FFS200
    5305-00-929-6558MS51021-62$0.85 2024-08
    5305-00-777-5760MS51021-63
    5305-00-682-5971MS51021-68
    5305-00-027-6244MS51021-69
    5305-00-682-5972MS51021-70
    5305-00-682-5973MS51021-72
    5305-00-089-7664MS51021-73
    5305-00-057-9088MS51021-74$1.05 2025-12
    5305-00-938-2745MS51021-75
    5305-00-818-8432MS51021-80
    5305-00-550-1864MS51021-81
    5305-00-811-0798MS51021-83
    5305-00-917-6337MS51021-84
    5305-00-245-8837MS51021-85FFS200
    5305-00-928-2367MS51021-86
    5305-00-272-3683MS51021-91$9.45 2024-08
    5305-00-489-0751MS51021-93FFS200$1.63 2024-09
    5305-00-420-0753MS51021-94FFS200$2.90 2025-03
    5305-01-138-4221MS51021-95FF-S-200
    5305-01-090-7151MS51021-96FF-S-200$1.11 2023-05
    5305-01-043-7710MS51021-101FF-S-200
    5305-01-004-6924MS51021-102FF-S-200$1.03 2023-01
    5305-01-047-3997MS51021-103FF-S-200
    5305-01-177-5884MS51021-104FF-S-200
    5305-01-219-4137MS51021-106FF-S-200$9.30 2024-04
    5305-01-057-3751MS51021-107FF-S-200

    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. 23 more stock numbers are not shown.

    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 5305 Screws. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.

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