NSN 5310-01-661-3876 · NIIN 016613876 · Part number 4317521
Oshkosh Defense Llc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 75Q65
Government record, cited
NSN 5310-01-661-3876 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-661-3876. Manufacturer of record part number: 4317521.
Also searched as5310-01-661-3876 ·
5310016613876 ·
NIIN 016613876 ·
01-661-3876 ·
FSC 5310 Nuts and Washers · CAGE 75Q65 · 4317521
Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Style Designator: INTERNAL TEETH
Outside Diameter: 0.96 MILLIMETERS MINIMUM AND 1.04 MILLIMETERS MAXIMUM MM
Material: STEEL CORROSION RESISTING OVERALL
Hole Diameter: 13.00 MILLIMETERS MINIMUM AND 13.27 MILLIMETERS MAXIMUM MM
1 manufacturer part number on file
Manufacturer of record: Oshkosh Defense Llc
Identification
NSN: 5310-01-661-3876
NIIN: 016613876
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 4317521
Manufacturer: Oshkosh Defense Llc
General Description
The Washer,lock, cataloged under National Stock Number 5310-01-661-3876, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 5 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-01-661-3876
Primary Part Number
4317521
Item Name
Washer,lock
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Oshkosh Defense Llc
Status
ACTIVE
Surface Treatment Document and Classification
ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Style Designator
INTERNAL TEETH
Outside Diameter
0.96 MILLIMETERS MINIMUM AND 1.04 MILLIMETERS MAXIMUM MM
Material
STEEL CORROSION RESISTING OVERALL
Hole Diameter
13.00 MILLIMETERS MINIMUM AND 13.27 MILLIMETERS MAXIMUM MM
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file
Frequently Asked Questions
What is NSN 5310-01-661-3876?
NSN 5310-01-661-3876 is a Washer,lock, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-661-3876?
NSN 5310-01-661-3876 has 1 manufacturer part number on file: 4317521 (Oshkosh Defense Llc).
What are the specifications of 4317521?
Key specifications for 4317521: Overall Height: 19.98 MILLIMETERS MINIMUM AND 20.50 MILLIMETERS MAXIMUM MM; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: INTERNAL TEETH; Outside Diameter: 0.96 MILLIMETERS MINIMUM AND 1.04 MILLIMETERS MAXIMUM MM. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-661-3876 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.