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Technical Data Sheet
PartsTable / COMPONENT / M5501/1-R4
M5501/1-R4 ✓ 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 M5501/1-R4 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 5340-01-050-4861, 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
M5501/1-R4
NSN: 5340-01-050-4861
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/1-R4
NSN5340-01-050-4861
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/1-R4 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
•
OVERALL DIAMETER: 0.620 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: SHOULDER
•
THREAD CLASS: 2A A
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.438 INCHES IN
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 7/16-20 UNF
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESDIMPLED SHOULDER DRIVE TYPE
OVERALL DIAMETER0.620 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
FEATURES PROVIDEDSHOULDER
THREAD CLASS2A A
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.438 INCHES IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR7/16-20 UNF
MATERIALPLASTIC
DESIGN TYPETHREADED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
5340PL1866828Upgraded Successor
successor cross-reference
successor
81584Upgraded Successor
successor cross-reference
successor
10160009Upgraded Successor
successor cross-reference
successor
MIL-C-5501/1Upgraded Successor
successor cross-reference
successor
NAS815-4AUpgraded Successor
successor cross-reference
successor
NAS833-4Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/1-R4?
M5501/1-R4 is a M5501/1-R4.
What parts can replace M5501/1-R4?
There are 25 known substitutes for M5501/1-R4: 5340PL1866828, 81584, 10160009 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/1-R4?
M5501/1-R4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-050-4861. 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