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A3866D550 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A3866D550: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include hole_diameter: 0.410 INCHES NOMINAL IN, inside_diameter: 3.000 INCHES NOMINAL IN, flange_thickness: 0.190 INCHES NOMINAL IN, outside_diameter: 5.690 INCHES NOMINAL IN, features_provided: SEALING CAPABILITY, bolt_circle_diameter: 4.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-734-6898, 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
A3866D550
NSN: 5340-00-734-6898
FSC: 5340 — Hardware, Commercial
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
hole_diameter0.410 INCHES NOMINAL IN
inside_diameter3.000 INCHES NOMINAL IN
flange_thickness0.190 INCHES NOMINAL IN
outside_diameter5.690 INCHES NOMINAL IN
features_providedSEALING CAPABILITY
bolt_circle_diameter4.750 INCHES NOMINAL IN
inside_corner_radius0.120 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
bolt_circle_hole_quantity8
cross-sectional_shape_styleCIRCULAR RECESS
mounting_opening_shape_styleUNTHREADED HOLE
NSN5340-00-734-6898
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A3866D550 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
•
FLANGE THICKNESS: 0.190 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 8
•
INSIDE CORNER RADIUS: 0.120 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 5.690 INCHES NOMINAL IN
•
FEATURES PROVIDED: SEALING CAPABILITY
•
SECURING DEVICE TYPE: THREADED FASTENER
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.190 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY8
INSIDE CORNER RADIUS0.120 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER5.690 INCHES NOMINAL IN
FEATURES PROVIDEDSEALING CAPABILITY
SECURING DEVICE TYPETHREADED FASTENER
INSIDE DIAMETER3.000 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER4.750 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
98644R11Reference document
Same NSN cross-reference
Reference document — Secondary reference
KC5339Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A3866D550?
A3866D550 is a COVER,ACCESS.
What parts can replace A3866D550?
There are 2 known substitutes for A3866D550: 98644R11, KC5339. Substitute compatibility should be verified for your specific system.
What is the NSN for A3866D550?
A3866D550 is cataloged in the U.S. Government catalog under NSN 5340-00-734-6898. This indicates validated use in U.S. government and defense supply chains.
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