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821E17 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

821E17: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL, rim_surface_width: 0.750 INCHES NOMINAL IN, peripheral_diameter: 1.125 INCHES NOMINAL IN, center_hole_diameter: 0.750 INCHES NOMINAL IN, cross-sectional_height: 1.062 INCHES NOMINAL IN, cross-sectional_shape_style: SPECIAL. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-298-0372, 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
821E17
NSN: 5330-00-298-0372
FSC: 5330 — Packing and Gasket Materials
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL
rim_surface_width0.750 INCHES NOMINAL IN
peripheral_diameter1.125 INCHES NOMINAL IN
center_hole_diameter0.750 INCHES NOMINAL IN
cross-sectional_height1.062 INCHES NOMINAL IN
cross-sectional_shape_styleSPECIAL
NSN5330-00-298-0372
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 821E17 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: 1.062 INCHES NOMINAL IN
•
RIM SURFACE WIDTH: 0.750 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
PERIPHERAL DIAMETER: 1.125 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT1.062 INCHES NOMINAL IN
RIM SURFACE WIDTH0.750 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESPECIAL
PERIPHERAL DIAMETER1.125 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.750 INCHES NOMINAL IN
MATERIALASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
HM137Reference document
Same NSN cross-reference
Reference document — Secondary reference
H137-MReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 821E17?
821E17 is a PACKING,PREFORMED.
What parts can replace 821E17?
There are 2 known substitutes for 821E17: HM137, H137-M. Substitute compatibility should be verified for your specific system.
What is the NSN for 821E17?
821E17 is cataloged in the U.S. Government catalog under NSN 5330-00-298-0372. 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.