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MS25178-8 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS25178-8: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, POLYETHYLENE (PP), design_type: FRICTION, overall_diameter: 0.709 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN, inside_diameter_length: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN, material_document_and_classification: L-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE, tube_outside_diameter_for_which_designed: 0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-208-1989, 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
MS25178-8
NSN: 5340-00-208-1989
FSC: 5340 — Hardware, Commercial
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeFRICTION
overall_diameter0.709 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
inside_diameter_length0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
material_document_and_classificationL-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
NSN5340-00-208-1989
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS25178-8 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
•
OVERALL DIAMETER: 0.709 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
•
INSIDE DIAMETER LENGTH: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER0.709 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
MATERIALPLASTIC, POLYETHYLENE (PP)
INSIDE DIAMETER LENGTH0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 5
34310513017Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
P4021569-03Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS90376-8RReference document
Same NSN cross-reference
Reference document — Secondary reference
NAS831Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
NAS831-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS25178-8?
MS25178-8 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS25178-8?
There are 5 known substitutes for MS25178-8: 34310513017, P4021569-03, MS90376-8R and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS25178-8?
MS25178-8 is cataloged in the U.S. Government catalog under NSN 5340-00-208-1989. This indicates validated use in U.S. government and defense supply chains.
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