PartsTable
Technical Data Sheet

MIL-R-25988/1 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MIL-R-25988/1: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROSILICONE CLASS FQ, hardness_rating: 70.0 SHORE DUROMETER A NOMINAL, special_features: OIL AND FUEL RESISTANT, center_hole_diameter: 1.609 INCHES NOMINAL IN, cross-sectional_height: 0.139 INCHES NOMINAL IN, end_item_identification: F16 AIRCRAFT; EMERGENCY POWER UNIT SYSTEM MAINTENANCE PANEL ASSY. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-279-4329, 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
MIL-R-25988/1
NSN: 5331-00-279-4329
NIINs: 002794329, 002799305, 002799309, 002799316, 002799321, 002799351, 002799352, 002799353, 002799409, 002816931, 002834631, 002881954, 002881997, 002882035, 003264360, 003289131, 003520321, 003692780, 003770921, 003818930, 004801846, 004863404, 004985733, 004985755, 005262486, 005596514, 005596516, 005596517, 005719549, 007027062, 007592121, 007630074, 007651948, 010054064, 010069048, 010069052, 010069053, 010069054, 010069486, 010071595, 010071597, 010071599, 010071600, 010071602, 010071603, 010071604, 010071605, 010071607, 010071608, 010071610, 010071611, 010071612, 010071613, 010071614, 010071615, 010071617, 010071618, 010071619, 010071620, 010071621, 010071622, 010071623, 010071627, 010071628, 010071629, 010071630, 010071631, 010071632, 010074898, 010074899, 010074900, 010074901, 010074902, 010074903, 010074904, 010074905, 010077088, 010078797, 010078798, 010078799, 010085426, 010102419, 010102420, 010102421, 010102422, 010165561, 010298944, 010323544, 010335799, 010435818, 010584010, 010661921, 010832339, 010836507, 010836508, 010836509, 010861745, 010892577, 010928749, 011000639, 011019485, 011021899, 011040115, 011161052, 011161053, 011195931, 011195932, 011256269, 011286069, 011288976, 011292002, 011292005, 011293141, 011293147, 011296962, 011304290, 011334880, 011365352, 011382107, 011391944, 011495968, 011610142, 011614020, 011701141, 011748255, 011812360, 011818234, 011818235, 011896351, 012075943, 012099421, 012195413, 012202475, 012202476, 012442274, 012545427, 012594086, 012637381, 012813847, 012862641, 012945984, 012984845, 013052599, 013390956, 013448264, 013463805, 013515545, 013517100, 013655767, 015015269, 015464081
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
hardness_rating70.0 SHORE DUROMETER A NOMINAL
special_featuresOIL AND FUEL RESISTANT
center_hole_diameter1.609 INCHES NOMINAL IN
cross-sectional_height0.139 INCHES NOMINAL IN
end_item_identificationF16 AIRCRAFT; EMERGENCY POWER UNIT SYSTEM MAINTENANCE PANEL ASSY
NSN5331-00-279-4329
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-R-25988/1 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: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.387 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 2.091 INCHES MINIMUM AND 2.127 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.387 INCHES NOMINAL IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER2.091 INCHES MINIMUM AND 2.127 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
SUBSTITUTES & CROSS-REFERENCES 3
MILR25988Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-25988/1Reference document
Same NSN cross-reference
Reference document — Identification reference
M25988/1-227Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy MIL-R-25988/1?
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 MIL-R-25988/1?
MIL-R-25988/1 is a O-RING.
What parts can replace MIL-R-25988/1?
There are 3 known substitutes for MIL-R-25988/1: MILR25988, MIL-DTL-25988/1, M25988/1-227. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-R-25988/1?
MIL-R-25988/1 is cataloged in the U.S. Government catalog under NSN 5331-00-279-4329. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MIL-R-25988/1

✓ 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.