PartsTable
Technical Data Sheet
PartsTable / O-RING / M25988/2-111
M25988/2-111 ✓ 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 M25988/2-111 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-401-4902, 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
M25988/2-111
NSN: 5331-00-401-4902
FSC: 5331 — O-RING
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM25988/2-111
NSN5331-00-401-4902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M25988/2-111 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
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
OUTSIDE DIAMETER: 0.630 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.417 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN
•
MATERIAL: RUBBER
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ELONGATION PERCENTAGE125 MAXIMUM
OUTSIDE DIAMETER0.630 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.417 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN
MATERIALRUBBER
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
MIL-R-25988BInterchangeable
interchangeable cross-reference
interchangeable
MFF18T220941BInterchangeable
interchangeable cross-reference
interchangeable
99-4601-501Interchangeable
interchangeable cross-reference
interchangeable
5-818Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-25988/2Interchangeable
interchangeable cross-reference
interchangeable
M25988/2-229Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy M25988/2-111?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is M25988/2-111?
M25988/2-111 is a M25988/2-111.
What parts can replace M25988/2-111?
There are 20 known substitutes for M25988/2-111: MIL-R-25988B, MFF18T220941B, 99-4601-501 and 17 more. Substitute compatibility should be verified for your specific system.
Is M25988/2-111 still available?
M25988/2-111 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — M25988/2-111

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026