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Technical Data Sheet
PartsTable / COMPONENT / M5501/3-108
M5501/3-108 ✓ 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 M5501/3-108 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 5340-01-138-2165, 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
M5501/3-108
NSN: 5340-01-138-2165
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/3-108
NSN5340-01-138-2165
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/3-108 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
•
INSIDE DIAMETER LENGTH: 0.610 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.750-16 UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
SURFACE TREATMENT: CHROMATE
•
DESIGN TYPE: THREADED
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER LENGTH0.610 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.750-16 UNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL DIAMETER0.500 INCHES NOMINAL IN
SURFACE TREATMENTCHROMATE
DESIGN TYPETHREADED
THREAD CLASS2B
ROUND CAP OUTSIDE SURFACE CONDITIONKNURLED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
M5501/3-R10Upgraded Successor
successor cross-reference
successor
MILC5501Upgraded Successor
successor cross-reference
successor
S8625-7-8-14Upgraded Successor
successor cross-reference
successor
6-16Upgraded Successor
successor cross-reference
successor
5340PL1450718Upgraded Successor
successor cross-reference
successor
118170Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/3-108?
M5501/3-108 is a M5501/3-108.
What parts can replace M5501/3-108?
There are 22 known substitutes for M5501/3-108: M5501/3-R10, MILC5501, S8625-7-8-14 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/3-108?
M5501/3-108 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-138-2165. 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