PartsTable TECHNICAL DATA SHEET

NSN 5331-01-083-6509Government record, cited

O-Ring5331-01-083-6509

NSN 5331-01-083-6509 · NIIN 010836509

FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5331-01-083-6509 · 5331010836509 · NIIN 010836509 · 01-083-6509 · FSC 5331 O-ring · MIL-DTL-25988/1 · M25988/1-439 · MIL-R-25988/1

Nearby stock numbers ← 5331-01-083-6508 O-Ring · 5331-01-083-7044 O-Ring →

5331-01-083-6509 — O-ring

Features

O-Ring — FSC 5331
Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
Outside Diameter: 7.025 INCHES NOMINAL IN
Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL
Elongation Percentage: 125 MAXIMUM
Center Hole Diameter: 6.435 INCHES MINIMUM AND 6.515 INCHES MAXIMUM IN
Material: RUBBER FLUOROSILICONE CLASS FQ

Identification

NSN: 5331-01-083-6509
NIIN: 010836509
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives

General Description

The O-Ring, cataloged under National Stock Number 5331-01-083-6509, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5331-01-083-6509
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Status	ACTIVE
Cross-Sectional Height	0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
Outside Diameter	7.025 INCHES NOMINAL IN
Hardness Rating	70.0 SHORE DUROMETER A NOMINAL
Elongation Percentage	125 MAXIMUM
Center Hole Diameter	6.435 INCHES MINIMUM AND 6.515 INCHES MAXIMUM IN
Material	RUBBER FLUOROSILICONE CLASS FQ

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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
MIL-DTL-25988/1	4/1 Identification reference U.S. Government activity
M25988/1-439	2/2 Government specification standardization U.S. Government activity
MIL-R-25988/1	5/9 Secondary reference U.S. Government activity

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 5331-01-083-6509?

NSN 5331-01-083-6509 is a O-Ring, classified under FSC 5331, O-ring. Status: active.

What are the specifications of 5331-01-083-6509?

Key specifications for 5331-01-083-6509: Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Outside Diameter: 7.025 INCHES NOMINAL IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Elongation Percentage: 125 MAXIMUM. 6 specifications are documented in the U.S. Government catalog.

Is NSN 5331-01-083-6509 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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