The O-Ring, cataloged under National Stock Number 5331-00-106-1918, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
5331-00-106-1918
Item Name
O-Ring
FSC / FSG
5331 / 53 — O-ring
Status
ACTIVE
Cross-Sectional Height
0.219 INCHES NOMINAL IN
Material
RUBBER SYNTHETIC
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.
3110-00-144-9793300061POSSIBLE MATCH
CONE AND ROLLERS,TAPERED ROLLER
Possible match (shared part number)Caterpillar Inc Div Caterpillar Defense
2990-00-316-6876POSSIBLE MATCH
PIPE,EXHAUST
Possible match (shared part number)
5840-00-409-8140POSSIBLE MATCH
DETECTOR STAGE
Possible match (shared part number)
5330-01-024-9803A300061POSSIBLE MATCH
RETAINER,PACKING
Possible match (shared part number)Pmc/beta Lp
5365-01-522-7259POSSIBLE MATCH
BUSHING,NONMETALLIC
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
ES245-1
3/9Design control — primary reference
Waldon Inc
3000-61
5/9Secondary reference
Waldon Inc
Related Parts
3110-00-144-9793POSSIBLE MATCH
CONE AND ROLLERS,TAPERED ROLLER
300061
2990-00-316-6876POSSIBLE MATCH
PIPE,EXHAUST
5840-00-409-8140POSSIBLE MATCH
DETECTOR STAGE
5330-01-024-9803POSSIBLE MATCH
RETAINER,PACKING
A300061
5365-01-522-7259POSSIBLE MATCH
BUSHING,NONMETALLIC
Frequently Asked Questions
What is NSN 5331-00-106-1918?
NSN 5331-00-106-1918 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
What NSN replaces 5331-00-106-1918?
5 possible matches (shared part number, not a government interchangeability claim): 3110-00-144-9793, 2990-00-316-6876, 5840-00-409-8140. Verify interchangeability with system specifications before substitution.
What are the specifications of 5331-00-106-1918?
Key specifications for 5331-00-106-1918: Cross-Sectional Height: 0.219 INCHES NOMINAL IN; Material: RUBBER SYNTHETIC. 2 specifications are documented in the U.S. Government catalog.
Is NSN 5331-00-106-1918 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.