Cross reference · MS (US military standards) · Screw thread insert
MS51831A cross reference
MS51831A is a screw thread insert series on 14 government stock numbers. Each one is labeled with how strong the evidence is.
- Issued by MS
- Item Screw thread insert
- Stock numbers 14
- Equivalents 11
- DLA paid $2.54 to $26.40
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- KH9900Howmet Fastening SystemsCatalog only, needs approvalon 3 of 14 stock numbers, 3 sizes
8 more on one stock number each: KNH1032JMXSY, KNH1216JMXSY, KNH420JMSY, KNH420JMXSY, KNH616JMXSY, KNH624JMXSY, KNH714JMXSY, KNH813JMXSY
- KNH1032JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH1216JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH420JMSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH420JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH616JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH624JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH714JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
- KNH813JMXSYHowmet Fastening SystemsCatalog only, needs approvalon 1 of 14 stock numbers
Standards
- NAS1395NASCatalog only, needs approvalon 2 of 14 stock numbers, 2 sizes
Airframer and OEM drawings
- CTS310ABoeingCatalog only, needs approvalon 3 of 14 stock numbers, 3 sizes
Plus 1 reference number whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for MS51831A
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for MS51831A. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 4 of 14 stock numbers, 11 awards from 2023-02-17 to 2025-08-12.
Latest award per stock number: $2.54 to $26.40 each.
DLA production lead time: 129 to 197 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
| NSN | MS51831A | KH9900 | NAS1395 | CTS310A | Last DLA price |
|---|---|---|---|---|---|
| 5325-01-132-6829 | MS51831A102 | CTS310A-13 | |||
| 5325-01-416-5882 | MS51831A103 | ||||
| 5325-01-054-6149 | MS51831A104 | KH9900-616 | CTS310A-15 | ||
| 5325-01-170-3222 | MS51831A105 | KH9900-714 | |||
| 5325-01-281-8736 | MS51831A106 | ||||
| 5325-01-286-7321 | MS51831A109 | CTS310A-19 | |||
| 5325-01-399-4620 | MS51831A110 | ||||
| 5325-01-255-4140 | MS51831A111 | ||||
| 5325-01-082-1333 | MS51831A-201 | KH9900-3 | $2.54 2023-02 | ||
| 5325-00-954-5198 | MS51831A202 | NAS1395-4 | $15.13 2025-08 | ||
| 5325-00-478-0312 | MS51831A204 | NAS1395-6 | $4.31 2023-11 | ||
| 5325-01-481-2869 | MS51831A208 | ||||
| 5325-01-373-6328 | MS51831A209 | $26.40 2024-05 | |||
| 5325-01-377-0350 | MS51831A210 |
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 5325 Fastening devices. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.
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