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Technical Data Sheet

M25988/4-110 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

M25988/4-110: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROSILICONE CLASS FQ, temp_rating: -90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM, outside_diameter: 0.557 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN, center_hole_diameter: 0.357 INCHES MINIMUM AND 0.367 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-178-7384, 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
M25988/4-110
NSN: 5331-01-178-7384
FSC: 5331 — O-ring
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER FLUOROSILICONE CLASS FQ
temp_rating-90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM
outside_diameter0.557 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN
center_hole_diameter0.357 INCHES MINIMUM AND 0.367 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-01-178-7384
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M25988/4-110 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
•
TEMP RATING: -90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.557 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
COLOR: BLUE
•
CENTER HOLE DIAMETER: 0.357 INCHES MINIMUM AND 0.367 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
TECHNICAL CHARACTERISTICS
TEMP RATING-90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.557 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM
ELONGATION PERCENTAGE125 MAXIMUM
COLORBLUE
CENTER HOLE DIAMETER0.357 INCHES MINIMUM AND 0.367 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
SUBSTITUTES & CROSS-REFERENCES 8
2-110 L806-80Reference document
Same NSN cross-reference
Reference document — Secondary reference
2-110 L1007-80Reference document
Same NSN cross-reference
Reference document — Secondary reference
L1218 2-110Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-25988/4Reference document
Same NSN cross-reference
Reference document — Identification reference
MIL-R-25988Reference document
Same NSN cross-reference
Reference document — Secondary reference
2-110 L1218-80Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M25988/4-110?
M25988/4-110 is a O-RING.
What parts can replace M25988/4-110?
There are 8 known substitutes for M25988/4-110: 2-110 L806-80, 2-110 L1007-80, L1218 2-110 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M25988/4-110?
M25988/4-110 is cataloged in the U.S. Government catalog under NSN 5331-01-178-7384. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.