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Technical Data Sheet
MILR25897-120ES ✓ 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 FLUOROCARBON CLASS FPM OVERALL, hardness_rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL, center_hole_diameter: 0.948 INCHES MINIMUM AND 0.992 INCHES MAXIMUM IN, cross-sectional_height: 0.097 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN, cross-sectional_shape_style: O-RING, material_document_and_classification: MIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-756-2435, 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
MILR25897-120ES
NSN: 5330-00-756-2435
FSC: 5330
CAGE: H2313 — ERIKS B.V. (NLD)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM OVERALL
hardness_rating70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
center_hole_diameter0.948 INCHES MINIMUM AND 0.992 INCHES MAXIMUM IN
cross-sectional_height0.097 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
cross-sectional_shape_styleO-RING
material_document_and_classificationMIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-756-2435
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MILR25897-120ES 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: 0.097 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLE: O-RING
CENTER HOLE DIAMETER: 0.948 INCHES MINIMUM AND 0.992 INCHES MAXIMUM IN
HARDNESS RATING: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: RUBBER FLUOROCARBON CLASS FPM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.097 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEO-RING
CENTER HOLE DIAMETER0.948 INCHES MINIMUM AND 0.992 INCHES MAXIMUM IN
HARDNESS RATING70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALRUBBER FLUOROCARBON CLASS FPM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
7HB539Interchangeable
interchangeable cross-reference
interchangeable
SE12IN FN-52 SHT 3Interchangeable
interchangeable cross-reference
interchangeable
500292Interchangeable
interchangeable cross-reference
interchangeable
S8057BF114Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILR25897-120ES?
MILR25897-120ES is a PACKING,PREFORMED.
What parts can replace MILR25897-120ES?
There are 4 known substitutes for MILR25897-120ES: 7HB539, SE12IN FN-52 SHT 3, 500292 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILR25897-120ES?
MILR25897-120ES is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-756-2435. This indicates validated use in U.S. government and defense supply chains.
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