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Technical Data Sheet
PartsTable / COMPONENT / M5501/5-R2
M5501/5-R2 ✓ 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 M5501/5-R2 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 5340-01-307-8041, 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
M5501/5-R2
NSN: 5340-01-307-8041
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/5-R2
NSN5340-01-307-8041
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/5-R2 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: T0.125-27 NPT
•
DRIVE TYPE: SQUARE HEAD
•
MATERIAL: ALUMINUM ALLOY 3003 OR PLASTIC
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.125 INCHES IN
•
DESIGN TYPE: THREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2, 0 FED SPEC SINGLE MATERIAL RESPONSE
•
SURFACE TREATMENT: CHROMATE
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A
THREAD SIZE AND SERIES/TYPE DESIGNATORT0.125-27 NPT
DRIVE TYPESQUARE HEAD
MATERIALALUMINUM ALLOY 3003 OR PLASTIC
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.125 INCHES IN
DESIGN TYPETHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2, 0 FED SPEC SINGLE MATERIAL RESPONSE
SURFACE TREATMENTCHROMATE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
P-38Upgraded Successor
successor cross-reference
successor
M5501/5-R6Upgraded Successor
successor cross-reference
successor
NAS840P6Upgraded Successor
successor cross-reference
successor
MS3102E22-33SCInterchangeable
interchangeable cross-reference
interchangeable
MIL-C-5-5015Interchangeable
interchangeable cross-reference
interchangeable
M5501/5-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/5-R2?
M5501/5-R2 is a M5501/5-R2.
What parts can replace M5501/5-R2?
There are 14 known substitutes for M5501/5-R2: P-38, M5501/5-R6, NAS840P6 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/5-R2?
M5501/5-R2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-307-8041. 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