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Technical Data Sheet
PartsTable / O-RING / MIL-R-25897
MIL-R-25897 ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, hardness_rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL, center_hole_diameter: 7.500 INCHES NOMINAL IN, cross-sectional_height: 0.125 INCHES NOMINAL IN, cross-sectional_shape_style: O-RING, nondefinitive_spec/std_data: 1 TYPE AND 1 CLASS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-166-0967, 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
MIL-R-25897
NSN: 5331-00-166-0967
FSC: 5331 — O-RING
CAGE: 83149 — JEANNETTE CORP (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
hardness_rating70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
center_hole_diameter7.500 INCHES NOMINAL IN
cross-sectional_height0.125 INCHES NOMINAL IN
cross-sectional_shape_styleO-RING
nondefinitive_spec/std_data1 TYPE AND 1 CLASS
NSN5331-00-166-0967
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-R-25897 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
002017Interchangeable
interchangeable cross-reference
interchangeable
66C64058Interchangeable
interchangeable cross-reference
interchangeable
22046-14Interchangeable
interchangeable cross-reference
interchangeable
MILR25897Interchangeable
interchangeable cross-reference
interchangeable
4400173-0140Interchangeable
interchangeable cross-reference
interchangeable
826281Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-R-25897?
MIL-R-25897 is a PACKING,PREFORMED.
What parts can replace MIL-R-25897?
There are 26 known substitutes for MIL-R-25897: 002017, 66C64058, 22046-14 and 23 more. Substitute compatibility should be verified for your specific system.
Is MIL-R-25897 still available?
MIL-R-25897 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