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Technical Data Sheet
MS25178-44 ✓ 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 material: PLASTIC, design_type: FRICTION, overall_diameter: 2.929 INCHES MINIMUM AND 2.991 INCHES MAXIMUM IN, inside_diameter_length: 0.569 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN, round_cap_outside_surface_condition: SMOOTH, material_document_and_classification: L-P-390, TYPE 1, CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-167-8027, 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
MS25178-44
NSN: 5340-00-167-8027
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter2.929 INCHES MINIMUM AND 2.991 INCHES MAXIMUM IN
inside_diameter_length0.569 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationL-P-390, TYPE 1, CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed2.710 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN
NSN5340-00-167-8027
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS25178-44 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
MATERIAL: PLASTIC
INSIDE DIAMETER LENGTH: 0.569 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 2.710 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL DIAMETER: 2.929 INCHES MINIMUM AND 2.991 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
MATERIALPLASTIC
INSIDE DIAMETER LENGTH0.569 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED2.710 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL DIAMETER2.929 INCHES MINIMUM AND 2.991 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
6971-0014Upgraded Successor
successor cross-reference
successor
MS90376-12RBUpgraded Successor
successor cross-reference
successor
M85049/138-24CUpgraded Successor
successor cross-reference
successor
6972-0012Upgraded Successor
successor cross-reference
successor
M85049/138-22CUpgraded Successor
successor cross-reference
successor
M85049/138-20CUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS25178-44?
MS25178-44 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS25178-44?
There are 13 known substitutes for MS25178-44: 6971-0014, MS90376-12RB, M85049/138-24C and 10 more. Substitute compatibility should be verified for your specific system.
Is MS25178-44 still available?
MS25178-44 is currently cancelled.
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