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YR371 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND COPPER OVERALL, outside_diameter: 0.688 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.391 INCHES NOMINAL IN, cross-sectional_thickness: 0.078 INCHES NOMINAL IN, cross-sectional_shape_style: METAL WITH SOFT FILLER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-190-4221, 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
YR371
NSN: 5330-00-190-4221
FSC: 5330
CAGE: 66935 — JOHNSON CONTROLS NAVY SYSTEMS, LLC (USA)
SPECIFICATIONS
materialASBESTOS AND COPPER OVERALL
outside_diameter0.688 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.391 INCHES NOMINAL IN
cross-sectional_thickness0.078 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
NSN5330-00-190-4221
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: YR371 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
•
APERTURE DIAMETER: 0.391 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.688 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS AND COPPER OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL WITH SOFT FILLER
•
CROSS-SECTIONAL THICKNESS: 0.078 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER0.391 INCHES NOMINAL IN
OUTSIDE DIAMETER0.688 INCHES NOMINAL IN
MATERIALASBESTOS AND COPPER OVERALL
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
CROSS-SECTIONAL THICKNESS0.078 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
221-294Interchangeable
interchangeable cross-reference
interchangeable
FG1789Interchangeable
interchangeable cross-reference
interchangeable
400062Interchangeable
interchangeable cross-reference
interchangeable
61192Interchangeable
interchangeable cross-reference
interchangeable
X318Interchangeable
interchangeable cross-reference
interchangeable
22CR18Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is YR371?
YR371 is a GASKET.
What parts can replace YR371?
There are 7 known substitutes for YR371: 221-294, FG1789, 400062 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for YR371?
YR371 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-190-4221. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026