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303347 — INSULATOR,WASHER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

303347: INSULATOR,WASHER.

The INSULATOR,WASHER is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, overall_height: 0.015 INCHES NOMINAL IN, inside_diameter: 0.635 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN, outside_diameter: 0.843 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN, style_designator: ROUND, FLAT, center_hole_diameter: 0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-061-8422, 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
303347
NSN: 5331-00-061-8422
NIINs: 000618422, 002116938
FSC: 5331 — O-ring
CAGE: 1UVT5 — BRP US INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
overall_height0.015 INCHES NOMINAL IN
inside_diameter0.635 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
outside_diameter0.843 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN
style_designatorROUND, FLAT
center_hole_diameter0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN
material_and_locationOVERALL PLASTIC, 63-018-17, TYPE PLE, SPERRY GYROSCOPE CO
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-00-061-8422
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 303347 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: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 1
10010192Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 303347?
303347 is a INSULATOR,WASHER.
What parts can replace 303347?
There is 1 known substitute for 303347: 10010192. Substitute compatibility should be verified for your specific system.
What is the NSN for 303347?
303347 is cataloged in the U.S. Government catalog under NSN 5331-00-061-8422. 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.