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634A204-2 — GASKET,SPIRAL WOUND

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

634A204-2: GASKET,SPIRAL WOUND.

The GASKET,SPIRAL WOUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 AND STEEL OVERALL, outside_diameter: 10.875 INCHES NOMINAL10.875 INCHES NOMINAL IN, special_features: OUTER RING IS LOW CARBON STEELOUTER RING IS LOW CARBON STEEL, style_designator: CIRCULAR, aperture_diameter: 8.125 INCHES NOMINAL8.125 INCHES NOMINAL IN, gage_ring_thickness: 0.119 INCHES MINIMUM AND 0.119 INCHES MINIMUM AND 0.131 INCHES MAXIMUM0.131 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-227-8685, 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
634A204-2
NSN: 5330-01-227-8685
FSC: 5330 — Packing and Gasket Materials
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 321 AND STEEL OVERALL
outside_diameter10.875 INCHES NOMINAL10.875 INCHES NOMINAL IN
special_featuresOUTER RING IS LOW CARBON STEELOUTER RING IS LOW CARBON STEEL
style_designatorCIRCULAR
aperture_diameter8.125 INCHES NOMINAL8.125 INCHES NOMINAL IN
gage_ring_thickness0.119 INCHES MINIMUM AND 0.119 INCHES MINIMUM AND 0.131 INCHES MAXIMUM0.131 INCHES MAXIMUM IN
bearing_surface_width0.750 INCHES NOMINAL0.750 INCHES NOMINAL IN
cross-sectional_thickness0.170 INCHES MINIMUM AND 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM0.180 INCHES MAXIMUM IN
gage_ring_outside_diameter11.875 INCHES NOMINAL11.875 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGSMETAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGS
NSN5330-01-227-8685
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 634A204-2 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 THICKNESS: 0.170 INCHES MINIMUM AND 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM0.180 INCHES MAXIMUM IN
•
GAGE RING THICKNESS: 0.119 INCHES MINIMUM AND 0.119 INCHES MINIMUM AND 0.131 INCHES MAXIMUM0.131 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CIRCULAR
•
BEARING SURFACE WIDTH: 0.750 INCHES NOMINAL0.750 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: METAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGSMETAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGS
•
OUTSIDE DIAMETER: 10.875 INCHES NOMINAL10.875 INCHES NOMINAL IN
•
GAGE RING OUTSIDE DIAMETER: 11.875 INCHES NOMINAL11.875 INCHES NOMINAL IN
•
APERTURE DIAMETER: 8.125 INCHES NOMINAL8.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.170 INCHES MINIMUM AND 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM0.180 INCHES MAXIMUM IN
GAGE RING THICKNESS0.119 INCHES MINIMUM AND 0.119 INCHES MINIMUM AND 0.131 INCHES MAXIMUM0.131 INCHES MAXIMUM IN
STYLE DESIGNATORCIRCULAR
BEARING SURFACE WIDTH0.750 INCHES NOMINAL0.750 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEMETAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGSMETAL WINDING W/ SOFT FILLER AND INNER AND OUTER RINGS
OUTSIDE DIAMETER10.875 INCHES NOMINAL10.875 INCHES NOMINAL IN
GAGE RING OUTSIDE DIAMETER11.875 INCHES NOMINAL11.875 INCHES NOMINAL IN
APERTURE DIAMETER8.125 INCHES NOMINAL8.125 INCHES NOMINAL IN
SPECIAL FEATURESOUTER RING IS LOW CARBON STEELOUTER RING IS LOW CARBON STEEL
MATERIALSTEEL COMP 321 AND STEEL OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
634A204P.2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 634A204-2?
634A204-2 is a GASKET,SPIRAL WOUND.
What parts can replace 634A204-2?
There is 1 known substitute for 634A204-2: 634A204P.2. Substitute compatibility should be verified for your specific system.
What is the NSN for 634A204-2?
634A204-2 is cataloged in the U.S. Government catalog under NSN 5330-01-227-8685. 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.