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Technical Data Sheet

M5501/5-4 — Technical Data Sheet

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· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: ALUMINUM ALLOY 3003, design_type: THREADED, overall_diameter: 0.875 INCHES NOMINAL IN, surface_treatment: CHROMATE, material_document_and_classification: QQ-A-250/2, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE, thread_size_and_series/type_designator: 0.250-18 NPT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-0784, 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
M5501/5-4
NSN: 5340-00-804-0784
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 3003
design_typeTHREADED
overall_diameter0.875 INCHES NOMINAL IN
surface_treatmentCHROMATE
material_document_and_classificationQQ-A-250/2, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE
thread_size_and_series/type_designator0.250-18 NPT
surface_treatment_document_and_classificationMIL-A-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A
NSN5340-00-804-0784
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/5-4 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: CHROMATE
OVERALL DIAMETER: 0.875 INCHES NOMINAL IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.250-18 NPT
MATERIAL: ALUMINUM ALLOY 3003
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A
DESIGN TYPE: THREADED
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCHROMATE
OVERALL DIAMETER0.875 INCHES NOMINAL IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.250-18 NPT
MATERIALALUMINUM ALLOY 3003
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A
DESIGN TYPETHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
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
M5501/5-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/5-4?
M5501/5-4 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace M5501/5-4?
There are 13 known substitutes for M5501/5-4: P-38, M5501/5-R6, NAS840P6 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/5-4?
M5501/5-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-0784. This indicates validated use in U.S. government and defense supply chains.
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