NSN 5331-00-551-1324 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-551-1324. Manufacturer of record part number: A-1525.
Also searched as5331-00-551-1324 ·
5331005511324 ·
NIIN 005511324 ·
00-551-1324 ·
FSC 5331 O-ring · CAGE 55469 · A-1525
Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
Center Hole Diameter: 1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
1 manufacturer part number on file
Manufacturer of record: Essex Industries, Inc. Dba Essex Industries
Identification
NSN: 5331-00-551-1324
NIIN: 005511324
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: A-1525
Manufacturer: Essex Industries, Inc. Dba Essex Industries
General Description
The O-Ring, cataloged under National Stock Number 5331-00-551-1324, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Essex Industries, Inc. Dba Essex Industries. Government technical data includes 3 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. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5331-00-551-1324
Primary Part Number
A-1525
Item Name
O-Ring
FSC / FSG
5331 / 53 — O-ring
Manufacturer
Essex Industries, Inc. Dba Essex Industries
Status
ACTIVE
Cross-Sectional Height
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
Center Hole Diameter
1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
Material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
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
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-00-753-7364453B81POSSIBLE MATCH
STRAP,RETAINING
Possible match (shared part number)Dcm Manufacturing, Inc.
5955-01-147-2311SM-A-838377-1POSSIBLE MATCH
OSCILLATOR,CRYSTAL CONTROLLED
Possible match (shared part number)Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6530-01-378-0230A1525POSSIBLE MATCH
FILTER,STERILIZER
Possible match (shared part number)Steris Corporation Dba Steris Applied Sterilization Technololgies
NSN 5331-00-551-1324 is a O-Ring, manufactured by Essex Industries, Inc. Dba Essex Industries, classified under FSC 5331, O-ring. Status: active.
What part numbers are listed for NSN 5331-00-551-1324?
NSN 5331-00-551-1324 has 1 manufacturer part number on file: A-1525 (Essex Industries, Inc. Dba Essex Industries).
What NSN replaces 5331-00-551-1324?
6 possible matches (shared part number, not a government interchangeability claim): 5340-00-753-7364, 5955-01-147-2311, 6530-01-378-0230. Verify interchangeability with system specifications before substitution.
What are the specifications of A-1525?
Key specifications for A-1525: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Center Hole Diameter: 1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 3 specifications are documented in the U.S. Government catalog.
Is NSN 5331-00-551-1324 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.