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Technical Data Sheet
PartsTable / COMPONENT / MIL-C-5501
MIL-C-5501 ✓ 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

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include part_name_assigned_by_controlling_agency: PLASTIC PROTECTIVE CAP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-051-0029, 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
MIL-C-5501
NSN: 5340-00-051-0029
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
part_name_assigned_by_controlling_agencyPLASTIC PROTECTIVE CAP
NSN5340-00-051-0029
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-C-5501 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
•
DESIGN TYPE: FRICTION
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
INSIDE DIAMETER LENGTH: 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: PLASTIC
•
OVERALL DIAMETER: 1.375 INCHES MINIMUM AND 1.437 INCHES MAXIMUM IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.140 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER LENGTH0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
MATERIALPLASTIC
OVERALL DIAMETER1.375 INCHES MINIMUM AND 1.437 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.140 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
M5501/1-R6Upgraded Successor
successor cross-reference
successor
MILC5501Upgraded Successor
successor cross-reference
successor
MIL-C-5501/1Upgraded Successor
successor cross-reference
successor
M5501/1-R8Upgraded Successor
successor cross-reference
successor
NAS847 MIL-C-5501G-9Upgraded Successor
successor cross-reference
successor
NAS844-12Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-C-5501?
MIL-C-5501 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MIL-C-5501?
There are 28 known substitutes for MIL-C-5501: M5501/1-R6, MILC5501, MIL-C-5501/1 and 25 more. Substitute compatibility should be verified for your specific system.
Is MIL-C-5501 still available?
MIL-C-5501 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026