PartsTable TECHNICAL DATA SHEET

NSN 5331-01-528-4362Government record, cited

O-Ring5331-01-528-4362

NSN 5331-01-528-4362 · NIIN 015284362 · Part number 0618639

Caterpillar Inc Div Caterpillar Defense · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 11083

Government record, cited

NSN 5331-01-528-4362 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-528-4362. Manufacturer of record part number: 0618639.

Also searched as 5331-01-528-4362 · 5331015284362 · NIIN 015284362 · 01-528-4362 · FSC 5331 O-ring · CAGE 11083 · 0618639 · 23KP853 · 23KP853

Nearby stock numbers ← 5331-01-528-4359 O-Ring · 5331-01-528-4389 O-Ring →

5331-01-528-4362 — O-ring

Features

O-Ring — FSC 5331
2 manufacturer part numbers on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 5331-01-528-4362
NIIN: 015284362
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 0618639
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The O-Ring, cataloged under National Stock Number 5331-01-528-4362, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	O-Ring
FSC / FSG	5331 — O-ring (FSG 53)
Manufacturers	Oshkosh Defense Llc (CAGE 75Q65); Caterpillar Inc Div Caterpillar Defense (CAGE 11083)

Technical Specifications

Parameter	Value
NSN	5331-01-528-4362
Primary Part Number	0618639
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
23KP853	Oshkosh Defense Llc (USA)
0618639 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Reference documents

Reference	Meaning
23KP853	5/9 Secondary reference Oshkosh Corp

No interchangeability data on file.

Other items in FSC 5331 — O-ring

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5331-00-001-1971

O-RING

5331-00-001-1979

O-RING

5331-00-001-3904

O-RING

5331-00-001-3905

O-RING

5331-00-001-3906

O-RING

5331-00-001-3908

O-RING

5331-00-001-3923

O-RING

5331-00-001-3924

O-RING

Frequently Asked Questions

What is NSN 5331-01-528-4362?

NSN 5331-01-528-4362 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.

What part numbers are listed for NSN 5331-01-528-4362?

NSN 5331-01-528-4362 has 2 manufacturer part numbers on file: 23KP853 (Oshkosh Defense Llc), 0618639 (Caterpillar Inc Div Caterpillar Defense).

Is NSN 5331-01-528-4362 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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