NSN 5310-01-491-1996 · NIIN 014911996 · Part number 124-7120998 PC 11
Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5310-01-491-1996 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-491-1996. Manufacturer of record part number: 124-7120998 PC 11.
Also searched as5310-01-491-1996 ·
5310014911996 ·
NIIN 014911996 ·
01-491-1996 ·
FSC 5310 Nuts and Washers · CAGE 53711 · 124-7120998 PC 11 · 7120998
Width Across Flats: 1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
Surface Treatment Document and Classification: QQ-Z-325,TY II,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread Series: UNIFIED NATIONAL COARSE (UNC)
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.875 INCHES IN
Nut Height: 0.458 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
Surface Treatment: ZINC AND CHROMATE OVERALL
Identification
NSN: 5310-01-491-1996
NIIN: 014911996
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 124-7120998 PC 11
Manufacturer: Naval Sea Systems Command
General Description
The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-491-1996, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-01-491-1996
Primary Part Number
124-7120998 PC 11
Item Name
Nut,plain,hexagon
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Width Across Flats
1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
Surface Treatment Document and Classification
QQ-Z-325,TY II,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread Series
UNIFIED NATIONAL COARSE (UNC)
Thread Direction
RIGHT-HAND
Nominal Thread Size
0.875 INCHES IN
Nut Height
0.458 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
Surface Treatment
ZINC AND CHROMATE OVERALL
Nut Style
HEXAGON
Thread Class
2B
Thread Quantity Per Inch
9
Material
STEEL OVERALL
Bearing Surface Type
CHAMFERED OR WASHER FACED
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-01-491-2202124-7120998 PC 8-90POSSIBLE MATCH
RETAINER,HELICAL COMPRESSION SPR
Possible match (shared part number)Naval Sea Systems Command
5340-01-491-2212124-7120998 PC 9-90POSSIBLE MATCH
RETAINER,HELICAL COMPRESSION SPR
Possible match (shared part number)Naval Sea Systems Command
5340-01-491-2618124-7120998 PC 8-81POSSIBLE MATCH
RETAINER,HELICAL COMPRESSION SPR
Possible match (shared part number)Naval Sea Systems Command
5340-01-491-4336124-7120998 PC 8-91POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Naval Sea Systems Command
5340-01-491-4349124-7120998 PC 8-83POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Naval Sea Systems Command
5340-01-491-4354124-7120998 PC 8-82POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Naval Sea Systems Command
3040-01-491-7892124-7120998 PC 25POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
5340-01-492-0435124-7120998 PC 9-74POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Naval Sea Systems Command
5340-01-492-0438124-7120998 PC 9-76POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Naval Sea Systems Command
5365-01-492-0466124-7120998 PC 8-77POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
NSN 5310-01-491-1996 is a Nut,plain,hexagon, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-491-1996?
NSN 5310-01-491-1996 has 1 manufacturer part number on file: 124-7120998 PC 11 (Naval Sea Systems Command).
What NSN replaces 5310-01-491-1996?
12 possible matches (shared part number, not a government interchangeability claim): 5340-01-491-2202, 5340-01-491-2212, 5340-01-491-2618. Verify interchangeability with system specifications before substitution.
What are the specifications of 124-7120998 PC 11?
Key specifications for 124-7120998 PC 11: Width Across Flats: 1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-Z-325,TY II,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND. 12 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-491-1996 hazardous material?
No hazard code in the DLA record (HMIC N). 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.