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Technical Data Sheet
PartsTable / COMPONENT / M5501/2-5
M5501/2-5 ✓ 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 M5501/2-5 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 5340-00-804-1239, 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
M5501/2-5
NSN: 5340-00-804-1239
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/2-5
NSN5340-00-804-1239
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/2-5 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
•
THREAD CLASS: 2A A
•
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
•
OVERALL DIAMETER: 0.680 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/2-20 NF
•
DESIGN TYPE: THREADED
•
DRIVE TYPE: SERRATED OR SQUARE HEAD OR HEX SOCKET
•
MATERIAL: ALUMINUM ALLOY 3003
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
OVERALL DIAMETER0.680 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/2-20 NF
DESIGN TYPETHREADED
DRIVE TYPESERRATED OR SQUARE HEAD OR HEX SOCKET
MATERIALALUMINUM ALLOY 3003
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
FEATURES PROVIDEDSHOULDER
NONDEFINITIVE SPEC/STD DATA1 TYPE AND C CLASS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
NAS847Upgraded Successor
successor cross-reference
successor
MIL-C-5501/7Upgraded Successor
successor cross-reference
successor
M5501/7-F24Upgraded Successor
successor cross-reference
successor
AEP1543-2Upgraded Successor
successor cross-reference
successor
EC14Upgraded Successor
successor cross-reference
successor
36B505139P4Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/2-5?
M5501/2-5 is a M5501/2-5.
What parts can replace M5501/2-5?
There are 11 known substitutes for M5501/2-5: NAS847, MIL-C-5501/7, M5501/7-F24 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/2-5?
M5501/2-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-1239. 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