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Technical Data Sheet
PartsTable / O-RING / M25988/1-019
M25988/1-019 ✓ 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 M25988/1-019 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-480-1846, 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
M25988/1-019
NSN: 5331-00-480-1846
FSC: 5331 — O-RING
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM25988/1-019
NSN5331-00-480-1846
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M25988/1-019 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
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
•
CENTER HOLE DIAMETER: 0.792 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
OUTSIDE DIAMETER: 0.941 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-25988, TY1, GR70 MIL SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER FLUOROSILICONE CLASS FQ
CENTER HOLE DIAMETER0.792 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
ELONGATION PERCENTAGE125 MAXIMUM
OUTSIDE DIAMETER0.941 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-25988, TY1, GR70 MIL SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
R49388-019GInterchangeable
interchangeable cross-reference
interchangeable
028-09377Interchangeable
interchangeable cross-reference
interchangeable
2-019V0747-75Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-25988/1Interchangeable
interchangeable cross-reference
interchangeable
2-019L677-70Interchangeable
interchangeable cross-reference
interchangeable
2-019L608-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M25988/1-019?
M25988/1-019 is a M25988/1-019.
What parts can replace M25988/1-019?
There are 11 known substitutes for M25988/1-019: R49388-019G, 028-09377, 2-019V0747-75 and 8 more. Substitute compatibility should be verified for your specific system.
Is M25988/1-019 still available?
M25988/1-019 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