Cross reference · ASME · Hexagon head cap screw

ASEMB1821 cross referenceHuck HC45, MS90727, Oshkosh 177FX, RTX 22524R

ASEMB1821 is a hexagon head cap screw series on 4 government stock numbers. Its closest equivalents are Huck HC45, MS90727, Oshkosh 177FX, RTX 22524R. Each one is labeled with how strong the evidence is.

Equivalents in the government catalog

4 stock numbers

Catalog-only listings need engineering approval before you substitute.

Manufacturers

    1 more on one stock number each: HC45
    • HC45HuckCatalog only, needs approvalon 1 of 4 stock numbers

    Standards

    • MS90727MSCatalog only, needs approvalon 3 of 4 stock numbers, 3 sizes
    • FFS85Federal specificationsCatalog only, needs approvalon 3 of 4 stock numbers, 2 sizes
    • MS90726MSCatalog only, needs approvalon 2 of 4 stock numbers, 2 sizes
    7 more on one stock number each: MS35304, MS90725, MS90728, B1821BH031F100N, B1821BH038C150N, B1821BH063F600N, B1821BH088F200N
    • MS35304MSCatalog only, needs approvalon 1 of 4 stock numbers
    • MS90725MSCatalog only, needs approvalon 1 of 4 stock numbers
    • MS90728MSCatalog only, needs approvalon 1 of 4 stock numbers
    • B1821BH031F100NANSICatalog only, needs approvalon 1 of 4 stock numbers
    • B1821BH038C150NANSICatalog only, needs approvalon 1 of 4 stock numbers
    • B1821BH063F600NANSICatalog only, needs approvalon 1 of 4 stock numbers
    • B1821BH088F200NANSICatalog only, needs approvalon 1 of 4 stock numbers

    Airframer and OEM drawings

      4 more on one stock number each: 177FX, 22524R, BACS12CG, F114
      • 177FXOshkoshCatalog only, needs approvalon 1 of 4 stock numbers
      • 22524RRTXCatalog only, needs approvalon 1 of 4 stock numbers
      • BACS12CGBoeingCatalog only, needs approvalon 1 of 4 stock numbers
      • F114BAE SystemsCatalog only, needs approvalon 1 of 4 stock numbers

      Plus 15 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).

      Get quotes for ASEMB1821

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

      Install tooling

      SpecLok has no catalog family for ASEMB1821. Tooling for the equivalents:

      None of the equivalents is in the SpecLok catalog yet.

      What the government paid

      DLA awards on 1 of 4 stock numbers, 2 awards from 2026-06-23 to 2026-06-23.

      Latest award per stock number: $6.28 each.

      DLA production lead time: 208 to 262 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

      4 stock numbers
      Part numbers DLA FLIS lists for ASEMB1821 and its equivalents, by stock number
      NSNASEMB1821HC45MS90727FFS85B1821BH031F100N177FXLast DLA price
      5305-00-904-4004ASEM-B18.2.1MS90727-209FF-S-85
      5305-00-051-4076ASEMB18.2.1MS90727-34FF-S-85B1821BH031F100N
      5305-00-725-2317ASEMB18.2.1HC-45177FX4
      5305-00-726-2572ASEMB18.2.1MS90727-178FFS85$6.28 2026-06

      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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