PartsTable
Technical Data Sheet
MIL-C-52078 ✓ 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-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, POLYETHYLENE (PP), length_under_shoulder: 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN, open_end_inside_diameter: 1.830 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN, closed_end_overall_diameter: 1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN, material_document_and_classification: L-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-264-1203, 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-52078
NSN: 5340-00-264-1203
FSC: 5340
CAGE: 80349 — AURORA BRONZE AND ALUMINUM CO (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
length_under_shoulder0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
open_end_inside_diameter1.830 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN
closed_end_overall_diameter1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
material_document_and_classificationL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-00-264-1203
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-C-52078 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
MATERIAL: PLASTIC
LENGTH UNDER SHOULDER: 0.740 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER: 0.802 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER: 0.911 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC
LENGTH UNDER SHOULDER0.740 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER0.802 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER0.911 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
MILC52078Upgraded Successor
successor cross-reference
successor
22SUpgraded Successor
successor cross-reference
successor
M5501/7-F38Upgraded Successor
successor cross-reference
successor
917966Upgraded Successor
successor cross-reference
successor
6735707-24Upgraded Successor
successor cross-reference
successor
17Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-C-52078?
MIL-C-52078 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace MIL-C-52078?
There are 26 known substitutes for MIL-C-52078: MILC52078, 22S, M5501/7-F38 and 23 more. Substitute compatibility should be verified for your specific system.
Is MIL-C-52078 still available?
MIL-C-52078 is currently cancelled.
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