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265531R91 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

265531R91: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, center_hole_diameter: 5.137 INCHES NOMINAL IN, cross-sectional_height: 0.215 INCHES NOMINAL IN, cross-sectional_shape_style: O-RING. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-618-2791, 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
265531R91
NSN: 5330-00-618-2791
FSC: 5330 — Packing and Gasket Materials
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
center_hole_diameter5.137 INCHES NOMINAL IN
cross-sectional_height0.215 INCHES NOMINAL IN
cross-sectional_shape_styleO-RING
NSN5330-00-618-2791
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 265531R91 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: 0.215 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: O-RING
•
CENTER HOLE DIAMETER: 5.137 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.215 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEO-RING
CENTER HOLE DIAMETER5.137 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC 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
265531R1Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 265531R91?
265531R91 is a PACKING,PREFORMED.
What parts can replace 265531R91?
There is 1 known substitute for 265531R91: 265531R1. Substitute compatibility should be verified for your specific system.
What is the NSN for 265531R91?
265531R91 is cataloged in the U.S. Government catalog under NSN 5330-00-618-2791. 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.