PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS25178
MS25178 ✓ 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: 2.250 INCHES NOMINAL IN, special_features: COLOR RED, inside_diameter_length: 0.531 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-500-5011, 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
NSN: 5340-00-500-5011
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter2.250 INCHES NOMINAL IN
special_featuresCOLOR RED
inside_diameter_length0.531 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationL-P-390, TYPE 1, CLASS L, GRADE 1 OR GRADE 2 FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed2.040 INCHES MINIMUM AND 2.060 INCHES MAXIMUM IN
opening_inside_diameter_for_which_designed1.920 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
NSN5340-00-500-5011
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS25178 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
•
OVERALL DIAMETER: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
N215EC20Interchangeable
interchangeable cross-reference
interchangeable
AS85049-41Interchangeable
interchangeable cross-reference
interchangeable
1219270-6Interchangeable
interchangeable cross-reference
interchangeable
B52-296-2Interchangeable
interchangeable cross-reference
interchangeable
MS25178Interchangeable
interchangeable cross-reference
interchangeable
MS25178-32Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS25178?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS25178?
MS25178 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS25178?
There are 9 known substitutes for MS25178: N215EC20, AS85049-41, 1219270-6 and 6 more. Substitute compatibility should be verified for your specific system.
Is MS25178 still available?
MS25178 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS25178

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026