PartsTable TECHNICAL DATA SHEET

NSN 5331-01-609-0642Government record, cited

O-Ring5331-01-609-0642

NSN 5331-01-609-0642 · NIIN 016090642 · Part number 50978460

Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 3HN73

Government record, cited

NSN 5331-01-609-0642 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-609-0642. Manufacturer of record part number: 50978460.

Also searched as 5331-01-609-0642 · 5331016090642 · NIIN 016090642 · 01-609-0642 · FSC 5331 O-ring · CAGE 3HN73 · 50978460 · 978460

Nearby stock numbers ← 5331-01-609-0396 O-Ring · 5331-01-609-0691 O-Ring →

5331-01-609-0642 — O-ring

Features

O-Ring — FSC 5331
1 manufacturer part number on file
Manufacturer of record: Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

Identification

NSN: 5331-01-609-0642
NIIN: 016090642
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 50978460
Manufacturer: Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

General Description

The O-Ring, cataloged under National Stock Number 5331-01-609-0642, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	O-Ring
FSC / FSG	5331 — O-ring (FSG 53)
Manufacturers	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc (CAGE 3HN73)

Technical Specifications

Parameter	Value
NSN	5331-01-609-0642
Primary Part Number	50978460
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Manufacturer	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc
Status	ACTIVE

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
50978460 PRIMARY	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc (USA)

Reference documents

Reference	Meaning
978460	5/9 Secondary reference Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

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 5331-01-609-0642?

NSN 5331-01-609-0642 is a O-Ring, manufactured by Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc, classified under FSC 5331, O-ring. Status: active.

What part numbers are listed for NSN 5331-01-609-0642?

NSN 5331-01-609-0642 has 1 manufacturer part number on file: 50978460 (Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc).

Is NSN 5331-01-609-0642 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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