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Technical Data Sheet
PartsTable / O-RING / M25988/1-003
M25988/1-003 ✓ 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 M25988/1-003 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-344-8264, 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
M25988/1-003
NSN: 5331-01-344-8264
FSC: 5331 — O-RING
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM25988/1-003
NSN5331-01-344-8264
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M25988/1-003 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: 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.052 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.052 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
378019Interchangeable
interchangeable cross-reference
interchangeable
10163440Interchangeable
interchangeable cross-reference
interchangeable
2-003L1120-70Interchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-25988/1Interchangeable
Same NIIN cross-reference
interchangeable
MIL-R-25988/1Interchangeable
Same NIIN cross-reference
interchangeable
L1120 2-003Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M25988/1-003?
M25988/1-003 is a M25988/1-003.
What parts can replace M25988/1-003?
There are 6 known substitutes for M25988/1-003: 378019, 10163440, 2-003L1120-70 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M25988/1-003?
M25988/1-003 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-344-8264. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026