Washer, Flat5310-01-703-1121

NSN 5310-01-703-1121 · NIIN 017031121 · Part number 4288185003

Oshkosh Defense Llc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 75Q65

Government record, cited

NSN 5310-01-703-1121 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-703-1121. Manufacturer of record part number: 4288185003.

Also searched as 5310-01-703-1121 · 5310017031121 · NIIN 017031121 · 01-703-1121 · FSC 5310 Nuts and Washers · CAGE 75Q65 · 4288185003

Nearby stock numbers ← 5310-01-703-0994 Nut Assembly, Self-Locking, Gang C · 5310-01-703-1272 Nut, Plain, Cone Seat, Hexagon →

5310-01-703-1121 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 0.992 INCHES NOMINAL IN
Cross-Sectional Shape Style: RECTANGULAR
Outside Diameter: 0.992 INCHES NOMINAL IN
Peripheral Shape Style: ROUND
Material: STEEL OVERALL
Center Hole Shape Style: ROUND
Hole Diameter: 0.400 INCHES NOMINAL IN

Identification

NSN: 5310-01-703-1121
NIIN: 017031121
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 4288185003
Manufacturer: Oshkosh Defense Llc

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-703-1121, 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 8 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	5310-01-703-1121
Primary Part Number	4288185003
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Oshkosh Defense Llc
Status	ACTIVE
Overall Diameter	0.992 INCHES NOMINAL IN
Cross-Sectional Shape Style	RECTANGULAR
Outside Diameter	0.992 INCHES NOMINAL IN
Peripheral Shape Style	ROUND
Material	STEEL OVERALL
Center Hole Shape Style	ROUND
Hole Diameter	0.400 INCHES NOMINAL IN
Thickness	0.047 INCHES NOMINAL IN

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

Cross-Reference Index

Part Number	Manufacturer
4288185003 PRIMARY	Oshkosh Defense Llc (USA)

No interchangeability data on file.

Other items in FSC 5310 — Nuts and Washers

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 5310-01-703-1121?

NSN 5310-01-703-1121 is a Washer,flat, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-703-1121?

NSN 5310-01-703-1121 has 1 manufacturer part number on file: 4288185003 (Oshkosh Defense Llc).

What are the specifications of 4288185003?

Key specifications for 4288185003: Overall Diameter: 0.992 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 0.992 INCHES NOMINAL IN; Peripheral Shape Style: ROUND. 8 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-703-1121 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.

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