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Q4R — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

Q4R: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, special_features: UNION SIZE 3/4 INCH IN, center_hole_diameter: 0.990 INCHES NOMINAL IN, cross-sectional_height: 0.130 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: SEAL, UNION. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-517-2294, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
Q4R
NSN: 5331-01-517-2294
FSC: 5331 — O-ring
CAGE: 79926 — SSP FITTINGS CORP (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
special_featuresUNION SIZE 3/4 INCH IN
center_hole_diameter0.990 INCHES NOMINAL IN
cross-sectional_height0.130 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySEAL, UNION
NSN5331-01-517-2294
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: Q4R MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.130 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.990 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.130 INCHES NOMINAL IN
SPECIAL FEATURESUNION SIZE 3/4 INCH IN
CENTER HOLE DIAMETER0.990 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL, UNION
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
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 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 3
161K0228-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
161K0000 ITEM 65Reference document
Same NSN cross-reference
Reference document — Secondary reference
161K0228 PN Q4RReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is Q4R?
Q4R is a O-RING.
What parts can replace Q4R?
There are 3 known substitutes for Q4R: 161K0228-5, 161K0000 ITEM 65, 161K0228 PN Q4R. Substitute compatibility should be verified for your specific system.
What is the NSN for Q4R?
Q4R is cataloged in the U.S. Government catalog under NSN 5331-01-517-2294. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.