NSN 5331-00-253-2810 · NIIN 002532810 · Part number 121020
Donaldson Company, Inc. · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 13520
Government record, cited
NSN 5331-00-253-2810 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-253-2810. Manufacturer of record part number: 121020.
Also searched as5331-00-253-2810 ·
5331002532810 ·
NIIN 002532810 ·
00-253-2810 ·
FSC 5331 O-ring · CAGE 13520 · 121020
Cross-Sectional Height: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
Center Hole Diameter: 1.710 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN
Material: RUBBER
1 manufacturer part number on file
Manufacturer of record: Donaldson Company, Inc.
Identification
NSN: 5331-00-253-2810
NIIN: 002532810
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 121020
Manufacturer: Donaldson Company, Inc.
General Description
The O-Ring, cataloged under National Stock Number 5331-00-253-2810, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Donaldson Company, Inc.. 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. 4 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
5331-00-253-2810
Primary Part Number
121020
Item Name
O-Ring
FSC / FSG
5331 / 53 — O-ring
Manufacturer
Donaldson Company, Inc.
Status
ACTIVE
Cross-Sectional Height
0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
Center Hole Diameter
1.710 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN
Material
RUBBER
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3610-00-779-1948121020POSSIBLE MATCH
PIN,HEADER
Possible match (shared part number)Smyth Mfg Co Sub of the Beacon Group
5305-00-957-6265MS35190-234POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-01-269-14261210-20POSSIBLE MATCH
WASHER,LOCK
Possible match (shared part number)Koehring Cranes, Inc Dba Terex Cranes Div Waverly Operations
NSN 5331-00-253-2810 is a O-Ring, manufactured by Donaldson Company, Inc., classified under FSC 5331, O-ring. Status: active.
What part numbers are listed for NSN 5331-00-253-2810?
NSN 5331-00-253-2810 has 1 manufacturer part number on file: 121020 (Donaldson Company, Inc.).
What NSN replaces 5331-00-253-2810?
4 possible matches (shared part number, not a government interchangeability claim): 3610-00-779-1948, 5305-00-957-6265, 5310-01-269-1426. Verify interchangeability with system specifications before substitution.
What are the specifications of 121020?
Key specifications for 121020: Cross-Sectional Height: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN; Center Hole Diameter: 1.710 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN; Material: RUBBER. 3 specifications are documented in the U.S. Government catalog.
Is NSN 5331-00-253-2810 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.