Cross reference · MS (US military standards) · Socket head cap screw

MS16998 cross referenceFFS86

MS16998 is a socket head cap screw series on 111 government stock numbers. Its closest equivalents are FFS86. Each one is labeled with how strong the evidence is.

Equivalents in the government catalog

111 stock numbers

Catalog-only listings need engineering approval before you substitute.

Manufacturers

    1 more on one stock number each: PK161
    • PK161Stanley Engineered FasteningCatalog only, needs approvalon 1 of 111 stock numbers

    Standards

    • FFS86Federal specificationsCatalog only, needs approvalon 54 of 111 stock numbers, 2 sizes
    • NAS1351NASCatalog only, needs approvalon 31 of 111 stock numbers, 37 sizes
    • FFS86REVISIONCFederal specificationsCatalog only, needs approvalon 12 of 111 stock numbers
    5 more on one stock number each: NAS608, NAS608C, NASM1651, FFS86RDVISIONC, FS86REVISIONC
    • NAS608NASCatalog only, needs approvalon 1 of 111 stock numbers
    • NAS608CNASCatalog only, needs approvalon 1 of 111 stock numbers
    • NASM1651NASCatalog only, needs approvalon 1 of 111 stock numbers
    • FFS86RDVISIONCFederal specificationsCatalog only, needs approvalon 1 of 111 stock numbers
    • FS86REVISIONCFederal specificationsCatalog only, needs approvalon 1 of 111 stock numbers

    Airframer and OEM drawings

      7 more on one stock number each: 131C738H, 23528R, 2749HX, 345628PC, PWA8662, S8150, Z00N
      • 131C738HNorthrop GrummanCatalog only, needs approvalon 1 of 111 stock numbers
      • 23528RRTXCatalog only, needs approvalon 1 of 111 stock numbers
      • 2749HXOshkoshCatalog only, needs approvalon 1 of 111 stock numbers
      • 345628PCUS NavyCatalog only, needs approvalon 1 of 111 stock numbers
      • PWA8662RTXCatalog only, needs approvalon 1 of 111 stock numbers
      • S8150HoneywellCatalog only, needs approvalon 1 of 111 stock numbers
      • Z00NDaherCatalog only, needs approvalon 1 of 111 stock numbers

      Plus 101 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).

      Get quotes for MS16998

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

      Install tooling

      SpecLok has no catalog family for MS16998. Tooling for the equivalents:

      None of the equivalents is in the SpecLok catalog yet.

      What the government paid

      DLA awards on 24 of 111 stock numbers, 129 awards from 2023-01-04 to 2026-09-03.

      Latest award per stock number: $0.16 to $50.00 each.

      DLA production lead time: 30 to 362 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

      111 stock numbers
      Part numbers DLA FLIS lists for MS16998 and its equivalents, by stock number
      NSNMS16998FFS86NAS1351Last DLA price
      5305-01-155-8652MS16998-1FF-S-86NAS1351-00-2P
      5305-00-058-2062MS16998-2FF-S-86$50.00 2024-08
      5305-00-058-2063MS16998-3FF-S-86NAS1351-00-4P
      5305-00-058-2064MS16998-4
      5305-00-914-7647MS16998-5
      5305-00-983-6648MS16998-9
      5305-00-983-6649MS16998-10FF-S-86
      5305-01-148-2644MS16998-11FF-S-86NAS1351-06-8P
      5305-00-983-7427MS16998-12FF-S-86
      5305-00-052-8249MS16998-13
      5305-00-052-8250MS16998-19FF-S-86NAS1351-08-8P$1.54 2025-05
      5305-00-058-0287MS16998-21FF-S-86
      5305-00-983-7428MS16998-26FF-S-86
      5305-00-983-6651MS16998-27$0.16 2026-04
      5305-00-058-0505MS16998-28NAS1351-3-10P
      Show 45 more sizes
      More sizes
      NSNMS16998FFS86NAS1351Last DLA price
      5305-00-983-7429MS16998-28
      5305-00-983-6652MS16998-29FF-S-86NAS1351-12P
      5306-01-428-6721MS16998-29
      5305-00-983-6653MS16998-30$0.37 2025-05
      5305-00-983-6654MS16998-31NAS1351-3LE16P/EXCLUDINGPEL$0.40 2025-11
      5305-00-983-6655MS16998-32
      5305-00-983-7430MS16998-33
      5305-00-889-3099MS16998-34
      5305-00-983-6656MS16998-35FFS86NAS1351-3-32P$0.57 2023-11
      5305-00-983-6657MS16998-40$0.44 2023-04
      5305-00-983-6658MS16998-41
      5305-00-983-6659MS16998-42NAS1351-4-10P$0.47 2026-06
      5305-00-983-6661MS16998-44$25.00 2025-08
      5305-00-983-6662MS16998-45
      5305-00-983-6663MS16998-46$1.52 2026-04
      5305-00-983-6664MS16998-47$0.44 2024-12
      5305-00-983-6665MS16998-48NAS1351-4LE-28P
      5305-00-983-6666MS16998-49FF-S-86
      5305-00-052-8251MS16998-50
      5305-00-983-6667MS16998-55
      5305-00-983-6668MS16998-56
      5305-00-983-6669MS16998-57
      5305-00-983-6670MS16998-58
      5305-00-983-6671MS16998-59FFS86NAS1351-5-16P$0.64 2024-04
      5305-00-983-6672MS16998-60
      5305-00-983-6673MS16998-61
      5305-00-983-7431MS16998-62
      5305-00-983-6675MS16998-64
      5305-00-983-7432MS16998-65
      5305-00-983-7433MS16998-70
      5305-00-983-7446MS16998-72FF-S-86
      5305-01-480-4423MS16998-72
      5305-00-983-7447MS16998-73NAS1351-06-14P$2.46 2024-06
      5305-00-983-7448MS16998-74NAS1351-6LL16P
      5305-00-983-7449MS16998-75FF-S-86
      5305-00-983-7450MS16998-76
      5305-00-983-7451MS16998-77NAS1351-6-28P
      5305-01-341-4696MS16998-77FF-S-86$3.13 2024-07
      5305-00-983-7452MS16998-78
      5305-00-983-7434MS16998-79NAS1351-6LB-36P
      5305-00-983-7453MS16998-80
      5305-00-983-7454MS16998-81
      5305-00-983-7435MS16998-86FF-S-86NAS1351-7-16P$2.25 2026-09
      5305-00-051-8608MS16998-87NAS1351-7-20P
      5305-00-983-7436MS16998-88NAS1351-7-24$4.10 2024-04

      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. 51 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 classes 5305 Screws, 5306 Bolts. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.

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