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Technical Data Sheet
PartsTable / COMPONENT / MIL-C-6855
MIL-C-6855 ✓ 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

The PACKING WITH RETAINER is a the manufacturer industrial component. Key specifications include material: STEEL RETAINER, construction: TWO-PIECE, outside_diameter: 0.687 INCHES NOMINAL IN, retainer_thickness: 0.050 INCHES NOMINAL IN, packing_inside_diameter: 0.364 INCHES NOMINAL IN, retainer_inside_diameter: 0.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-599-7724, 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-6855
NSN: 5330-00-599-7724
FSC: 5330
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL RETAINER
constructionTWO-PIECE
outside_diameter0.687 INCHES NOMINAL IN
retainer_thickness0.050 INCHES NOMINAL IN
packing_inside_diameter0.364 INCHES NOMINAL IN
retainer_inside_diameter0.500 INCHES NOMINAL IN
packing_ring_cross-sectional_diameter0.070 INCHES NOMINAL IN
NSN5330-00-599-7724
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-C-6855 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: RUBBER SYNTHETIC PACKING
•
RETAINER INSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
CONSTRUCTION: TWO-PIECE
•
PACKING INSIDE DIAMETER: 0.364 INCHES NOMINAL IN
•
RETAINER THICKNESS: 0.050 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.687 INCHES NOMINAL IN
•
PACKING RING CROSS-SECTIONAL DIAMETER: 0.070 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC PACKING
MATERIALSTEEL RETAINER
RETAINER INSIDE DIAMETER0.500 INCHES NOMINAL IN
CONSTRUCTIONTWO-PIECE
PACKING INSIDE DIAMETER0.364 INCHES NOMINAL IN
RETAINER THICKNESS0.050 INCHES NOMINAL IN
OUTSIDE DIAMETER0.687 INCHES NOMINAL IN
PACKING RING CROSS-SECTIONAL DIAMETER0.070 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
0537Interchangeable
interchangeable cross-reference
interchangeable
AN503-416-18Interchangeable
interchangeable cross-reference
interchangeable
NASM7839Interchangeable
interchangeable cross-reference
interchangeable
20338Interchangeable
interchangeable cross-reference
interchangeable
325C135Interchangeable
interchangeable cross-reference
interchangeable
A7364.001.145Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-C-6855?
MIL-C-6855 is a PACKING WITH RETAINER.
What parts can replace MIL-C-6855?
There are 19 known substitutes for MIL-C-6855: 0537, AN503-416-18, NASM7839 and 16 more. Substitute compatibility should be verified for your specific system.
Is MIL-C-6855 still available?
MIL-C-6855 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