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Technical Data Sheet
PartsTable / COMPONENT / M5501/3-8
M5501/3-8 ✓ 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 M5501/3-8 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 5340-00-804-0768, 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
M5501/3-8
NSN: 5340-00-804-0768
FSC: 5340
CAGE: 99017 — CAPLUGS LLC DBA MOKON DIV CAPLUGS (USA)
SPECIFICATIONS
Part NumberM5501/3-8
NSN5340-00-804-0768
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/3-8 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
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DESIGN TYPE: THREADED
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
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MATERIAL: ALUMINUM ALLOY 3003
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THREAD SIZE AND SERIES/TYPE DESIGNATOR: 7/8-14 UNF
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SURFACE TREATMENT: CHROMATE OR ANODIZE
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NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND A CLASS AND 10 SIZE
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MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2, COMP 3003 FED SPEC SINGLE MATERIAL RESPONSE
•
OVERALL DIAMETER: 1.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPETHREADED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
MATERIALALUMINUM ALLOY 3003
THREAD SIZE AND SERIES/TYPE DESIGNATOR7/8-14 UNF
SURFACE TREATMENTCHROMATE OR ANODIZE
NONDEFINITIVE SPEC/STD DATA2 TYPE AND A CLASS AND 10 SIZE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2, COMP 3003 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL DIAMETER1.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MILC5501TYPE2CLASSASIZE10Interchangeable
Same NIIN cross-reference
interchangeable
5340PL1455471Interchangeable
Same NIIN cross-reference
interchangeable
M5501/3-10Interchangeable
Same NIIN cross-reference
interchangeable
NAS835Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/3-8?
M5501/3-8 is a M5501/3-8.
What parts can replace M5501/3-8?
There are 4 known substitutes for M5501/3-8: MILC5501TYPE2CLASSASIZE10, 5340PL1455471, M5501/3-10 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/3-8?
M5501/3-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-0768. 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