NSN 5340-01-491-6939 · NIIN 014916939 · Part number 124-7120998
Naval Sea Systems Command · FSC 5340 — Hardware, Commercial · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5340-01-491-6939 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-491-6939. Manufacturer of record part number: 124-7120998.
Also searched as5340-01-491-6939 ·
5340014916939 ·
NIIN 014916939 ·
01-491-6939 ·
FSC 5340 Hardware, Commercial · CAGE 53711 · 124-7120998
The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-491-6939, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
Technical Specifications
Parameter
Value
NSN
5340-01-491-6939
Primary Part Number
124-7120998
Item Name
Retainer,helical Compression Spr
FSC / FSG
5340 / 53 — Hardware, Commercial
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Flange Diameter
9.312 INCHES NOMINAL IN
Body Outside Diameter
7.562 INCHES NOMINAL IN
Style Designator
PARALLEL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
Unit of Issue
EA
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5365-01-491-9536124-7120998 PC 8-94POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
5365-01-491-9559124-7120998 PC 9-94POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
5365-01-491-9574124-7120998 PC 8-88POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
5365-01-491-9592124-7120998 PC 8-80POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
NSN 5340-01-491-6939 is a Retainer,helical Compression Spr, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
What part numbers are listed for NSN 5340-01-491-6939?
NSN 5340-01-491-6939 has 1 manufacturer part number on file: 124-7120998 (Naval Sea Systems Command).
What NSN replaces 5340-01-491-6939?
4 possible matches (shared part number, not a government interchangeability claim): 5365-01-491-9536, 5365-01-491-9559, 5365-01-491-9574. Verify interchangeability with system specifications before substitution.
What are the specifications of 124-7120998?
Key specifications for 124-7120998: Flange Diameter: 9.312 INCHES NOMINAL IN; Body Outside Diameter: 7.562 INCHES NOMINAL IN; Style Designator: PARALLEL; End Item Identification: HATCH. 3 specifications are documented in the U.S. Government catalog.
Is NSN 5340-01-491-6939 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.