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Technical Data Sheet
M5501/2-20 ✓ 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 M5501/2-20 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 5340-00-804-1225, 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
M5501/2-20
NSN: 5340-00-804-1225
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/2-20
NSN5340-00-804-1225
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/2-20 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
MATERIAL: ALUMINUM ALLOY 3003
SURFACE TREATMENT: CHROMATE OR ANODIZE
DESIGN TYPE: THREADED
OVERALL DIAMETER: 2.625 INCHES NOMINAL IN
DRIVE TYPE: SERRATED OR SQUARE HEAD OR HEX SOCKET
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
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND C CLASS AND 20 SIZE
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY 3003
SURFACE TREATMENTCHROMATE OR ANODIZE
DESIGN TYPETHREADED
OVERALL DIAMETER2.625 INCHES NOMINAL IN
DRIVE TYPESERRATED OR SQUARE HEAD OR HEX SOCKET
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
NONDEFINITIVE SPEC/STD DATA1 TYPE AND C CLASS AND 20 SIZE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
THREAD SIZE AND SERIES/TYPE DESIGNATOR1-5/8-12 UN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
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 M5501/2-20?
M5501/2-20 is a M5501/2-20.
What parts can replace M5501/2-20?
There are 12 known substitutes for M5501/2-20: NAS847, MIL-C-5501/7, M5501/7-F24 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/2-20?
M5501/2-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-1225. This indicates validated use in U.S. government and defense supply chains.
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