PartsTable TECHNICAL DATA SHEET

NSN 5331-01-656-8378Government record, cited

O-Ring5331-01-656-8378

NSN 5331-01-656-8378 · NIIN 016568378 · Part number A-631-12505-1

B.w. Elliott Manufacturing Co., Llc · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 72166

Government record, cited

NSN 5331-01-656-8378 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-656-8378. Manufacturer of record part number: A-631-12505-1.

Also searched as 5331-01-656-8378 · 5331016568378 · NIIN 016568378 · 01-656-8378 · FSC 5331 O-ring · CAGE 72166 · A-631-12505-1

Nearby stock numbers ← 5331-01-656-8375 O-Ring · 5331-01-656-9030 O-Ring →

5331-01-656-8378 — O-ring

Features

O-Ring — FSC 5331
Cross-Sectional Height: 0.103 INCHES NOMINAL IN
Outside Diameter: 0.812 INCHES NOMINAL IN
Center Hole Diameter: 0.612 INCHES NOMINAL IN
Material: RUBBER BUTADIENE NITRILE
1 manufacturer part number on file
Manufacturer of record: B.w. Elliott Manufacturing Co., Llc

Identification

NSN: 5331-01-656-8378
NIIN: 016568378
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: A-631-12505-1
Manufacturer: B.w. Elliott Manufacturing Co., Llc

General Description

The O-Ring, cataloged under National Stock Number 5331-01-656-8378, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is B.w. Elliott Manufacturing Co., Llc. Government technical data includes 4 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	5331-01-656-8378
Primary Part Number	A-631-12505-1
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Manufacturer	B.w. Elliott Manufacturing Co., Llc
Status	ACTIVE
Cross-Sectional Height	0.103 INCHES NOMINAL IN
Outside Diameter	0.812 INCHES NOMINAL IN
Center Hole Diameter	0.612 INCHES NOMINAL IN
Material	RUBBER BUTADIENE NITRILE

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
A-631-12505-1 PRIMARY	B.w. Elliott Manufacturing Co., Llc (USA)

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 5331-01-656-8378?

NSN 5331-01-656-8378 is a O-Ring, manufactured by B.w. Elliott Manufacturing Co., Llc, classified under FSC 5331, O-ring. Status: active.

What part numbers are listed for NSN 5331-01-656-8378?

NSN 5331-01-656-8378 has 1 manufacturer part number on file: A-631-12505-1 (B.w. Elliott Manufacturing Co., Llc).

What are the specifications of A-631-12505-1?

Key specifications for A-631-12505-1: Cross-Sectional Height: 0.103 INCHES NOMINAL IN; Outside Diameter: 0.812 INCHES NOMINAL IN; Center Hole Diameter: 0.612 INCHES NOMINAL IN; Material: RUBBER BUTADIENE NITRILE. 4 specifications are documented in the U.S. Government catalog.

Is NSN 5331-01-656-8378 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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