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Technical Data Sheet
PartsTable / COMPONENT / B37421-31104
B37421-31104 ✓ 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,SPIRAL WOUND is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND STEEL COMP 304 OVERALL, outside_diameter: 2.219 INCHES MINIMUM AND 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM2.281 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 1.578 INCHES MINIMUM AND 1.578 INCHES MINIMUM AND 1.609 INCHES MAXIMUM1.609 INCHES MAXIMUM IN, cross-sectional_thickness: 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN, cross-sectional_shape_style: METAL WINDING W/ SOFT FILLERMETAL WINDING W/ SOFT FILLER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-868-2584, 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
B37421-31104
NSN: 5330-00-868-2584
FSC: 5330
CAGE: 63220 — FLOWSERVE INC (USA)
SPECIFICATIONS
materialASBESTOS AND STEEL COMP 304 OVERALL
outside_diameter2.219 INCHES MINIMUM AND 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM2.281 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter1.578 INCHES MINIMUM AND 1.578 INCHES MINIMUM AND 1.609 INCHES MAXIMUM1.609 INCHES MAXIMUM IN
cross-sectional_thickness0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN
cross-sectional_shape_styleMETAL WINDING W/ SOFT FILLERMETAL WINDING W/ SOFT FILLER
material_document_and_classification66 FED STD 2ND MATERIAL RESPONSE OVERALL
NSN5330-00-868-2584
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B37421-31104 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
•
MATERIAL: ASBESTOS AND STEEL COMP 304 OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: METAL WINDING W/ SOFT FILLERMETAL WINDING W/ SOFT FILLER
•
APERTURE DIAMETER: 1.578 INCHES MINIMUM AND 1.578 INCHES MINIMUM AND 1.609 INCHES MAXIMUM1.609 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CIRCULAR
•
OUTSIDE DIAMETER: 2.219 INCHES MINIMUM AND 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM2.281 INCHES MAXIMUM IN
•
CROSS-SECTIONAL THICKNESS: 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD 2ND MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALASBESTOS AND STEEL COMP 304 OVERALL
CROSS-SECTIONAL SHAPE STYLEMETAL WINDING W/ SOFT FILLERMETAL WINDING W/ SOFT FILLER
APERTURE DIAMETER1.578 INCHES MINIMUM AND 1.578 INCHES MINIMUM AND 1.609 INCHES MAXIMUM1.609 INCHES MAXIMUM IN
STYLE DESIGNATORCIRCULAR
OUTSIDE DIAMETER2.219 INCHES MINIMUM AND 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM2.281 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD 2ND MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
31111Interchangeable
interchangeable cross-reference
interchangeable
31-105Interchangeable
interchangeable cross-reference
interchangeable
31-122Interchangeable
interchangeable cross-reference
interchangeable
QQA200-11Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
31104Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B37421-31104?
B37421-31104 is a GASKET,SPIRAL WOUND.
What parts can replace B37421-31104?
There are 17 known substitutes for B37421-31104: 31111, 31-105, 31-122 and 14 more. Substitute compatibility should be verified for your specific system.
Is B37421-31104 still available?
B37421-31104 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026