NSN 5331-01-503-2531 · NIIN 015032531 · Part number 182556
Woodward, Inc. Div Fuel Systems and Controls · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 66503
Government record, cited
NSN 5331-01-503-2531 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-503-2531. Manufacturer of record part number: 182556.
Also searched as5331-01-503-2531 ·
5331015032531 ·
NIIN 015032531 ·
01-503-2531 ·
FSC 5331 O-ring · CAGE 66503 · 182556
Manufacturer of record: Woodward, Inc. Div Fuel Systems and Controls
Identification
NSN: 5331-01-503-2531
NIIN: 015032531
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 182556
Manufacturer: Woodward, Inc. Div Fuel Systems and Controls
General Description
The O-Ring, cataloged under National Stock Number 5331-01-503-2531, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Woodward, Inc. Div Fuel Systems and Controls. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
O-Ring
FSC / FSG
5331 — O-ring (FSG 53)
Manufacturers
Woodward, Inc. Div Fuel Systems and Controls (CAGE 66503)
Technical Specifications
Parameter
Value
NSN
5331-01-503-2531
Primary Part Number
182556
Item Name
O-Ring
FSC / FSG
5331 / 53 — O-ring
Manufacturer
Woodward, Inc. Div Fuel Systems and Controls
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
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
2540-01-602-8436182834HN303POSSIBLE MATCH
CUSHION,SEAT,VEHICULAR
Possible match (shared part number)Seats Inc Div Seats Incorporated
2540-01-602-8440110439PSPOSSIBLE MATCH
BAR,GUIDE,VEHICULAR SEAT
Possible match (shared part number)Seats Inc Div Seats Incorporated
2540-01-602-8458182833HNPOSSIBLE MATCH
CUSHION,SEAT BACK,VEHICULAR
Possible match (shared part number)Seats Inc Div Seats Incorporated
2540-01-602-8990182832PSPOSSIBLE MATCH
PEDESTAL,SEAT
Possible match (shared part number)Seats Inc Div Seats Incorporated
5340-01-602-9691104481PSPOSSIBLE MATCH
HANDLE,MANUAL CONTROL
Possible match (shared part number)Seats Inc Div Seats Incorporated
Woodward, Inc. Div Fuel Systems and Controls (USA)
Related Parts
2540-01-602-8436POSSIBLE MATCH
CUSHION,SEAT,VEHICULAR
182834HN303
2540-01-602-8440POSSIBLE MATCH
BAR,GUIDE,VEHICULAR SEAT
110439PS
2540-01-602-8458POSSIBLE MATCH
CUSHION,SEAT BACK,VEHICULAR
182833HN
2540-01-602-8990POSSIBLE MATCH
PEDESTAL,SEAT
182832PS
5340-01-602-9691POSSIBLE MATCH
HANDLE,MANUAL CONTROL
104481PS
Frequently Asked Questions
What is NSN 5331-01-503-2531?
NSN 5331-01-503-2531 is a O-Ring, manufactured by Woodward, Inc. Div Fuel Systems and Controls, classified under FSC 5331, O-ring. Status: active.
What part numbers are listed for NSN 5331-01-503-2531?
NSN 5331-01-503-2531 has 1 manufacturer part number on file: 182556 (Woodward, Inc. Div Fuel Systems and Controls).
What NSN replaces 5331-01-503-2531?
5 possible matches (shared part number, not a government interchangeability claim): 2540-01-602-8436, 2540-01-602-8440, 2540-01-602-8458. Verify interchangeability with system specifications before substitution.
Is NSN 5331-01-503-2531 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.