Cross reference · MS (US military standards) · Tapping screw

MS51851 cross referenceFFS107

MS51851 is a tapping screw series on 42 government stock numbers. Its closest equivalents are FFS107. Each one is labeled with how strong the evidence is.

Equivalents in the government catalog

42 stock numbers

Catalog-only listings need engineering approval before you substitute.

Manufacturers

    1 more on one stock number each: 5/16X3/4TYPE
    • 5/16X3/4TYPEStanley Engineered FasteningCatalog only, needs approvalon 1 of 42 stock numbers

    Standards

    • FFS107Federal specificationsCatalog only, needs approvalon 37 of 42 stock numbers, 2 sizes
    • NASM51851NASCatalog only, needs approvalon 3 of 42 stock numbers
    1 more on one stock number each: FFS107TYPEBSTYLE10P
    • FFS107TYPEBSTYLE10PFederal specificationsCatalog only, needs approvalon 1 of 42 stock numbers

    Airframer and OEM drawings

      3 more on one stock number each: 104X164AE, 5210114PART, 61678AX
      • 104X164AEGECatalog only, needs approvalon 1 of 42 stock numbers
      • 5210114PARTUS NavyCatalog only, needs approvalon 1 of 42 stock numbers
      • 61678AXOshkoshCatalog only, needs approvalon 1 of 42 stock numbers

      Plus 10 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).

      Get quotes for MS51851

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

      Install tooling

      SpecLok has no catalog family for MS51851. Tooling for the equivalents:

      None of the equivalents is in the SpecLok catalog yet.

      What the government paid

      DLA awards on 5 of 42 stock numbers, 15 awards from 2023-03-22 to 2026-02-11.

      Latest award per stock number: $0.12 to $5.18 each.

      DLA production lead time: 19 to 208 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

      42 stock numbers
      Part numbers DLA FLIS lists for MS51851 and its equivalents, by stock number
      NSNMS51851FFS107Last DLA price
      5305-00-759-1641MS51851-1FFS107
      5305-00-152-5345MS51851-11FFS107
      5305-01-075-7066MS51851-13FF-S-107
      5305-00-003-9249MS51851-23FFS107
      5305-01-097-8925MS51851-24FF-S-107
      5305-01-250-6295MS51851-25FF-S-107
      5305-01-244-6865MS51851-32FF-S-107
      5305-01-312-5919MS51851-33FF-S-107
      5305-01-076-3150MS51851-34FF-S-107
      5305-01-185-3621MS51851-35FF-S-107
      5305-00-757-8287MS51851-43FFS107
      5305-00-757-8292MS51851-44FFS107
      5305-01-167-5490MS51851-45FF-S-107$3.00 2023-03
      5305-01-006-2044MS51851-46FF-S-107
      5305-01-136-5330MS51851-53FF-S-107
      Show 27 more sizes
      More sizes
      NSNMS51851FFS107Last DLA price
      5305-00-757-8122MS51851-64FFS107$0.18 2024-06
      5305-00-191-3641MS51851-65FFS107
      5305-00-003-9252MS51851-66FFS107
      5305-01-105-7187MS51851-68FF-S-107
      5305-01-207-9311MS51851-69FF-S-107
      5305-01-088-5322MS51851-74FF-S-107
      5305-01-287-6608MS51851-75FF-S-107
      5305-00-191-3640MS51851-85FFS107$0.12 2023-06
      5305-00-146-2662MS51851-86FFS107
      5305-00-146-2663MS51851-88FFS107
      5305-01-087-4478MS51851-95FF-S-107
      5305-00-565-4276MS51851-96FFS107
      5305-01-462-2413MS51851-98$1.98 2025-12
      5305-01-063-6417MS51851-99FF-S-107
      5305-01-090-3012MS51851-106
      5305-00-003-9255MS51851-108FFS107
      5305-01-315-7098MS51851-109FF-S-107
      5305-01-144-1625MS51851-112FF-S-107
      5305-01-419-1836MS51851-116
      5305-01-101-3312MS51851-126FF-S-107
      5305-01-219-5386MS51851-128FF-S-107
      5305-01-209-7112MS51851-129FF-S-107
      5305-01-532-0216MS51851-130FF-S-107
      5305-01-532-0219MS51851-132FF-S-107
      5305-00-012-8226MS51851-136$5.18 2026-02
      5305-01-182-8333MS51851-138FF-S-107
      5305-01-323-3786MS51851-141

      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 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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