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6658835 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6658835: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include body_thickness: 1.000 INCHES NOMINAL IN, inside_diameter: 6.500 INCHES NOMINAL IN, flange_thickness: 1.000 INCHES NOMINAL IN, outside_diameter: 7.500 INCHES NOMINAL IN, bolt_circle_diameter: 6.500 INCHES NOMINAL IN, peripheral_shape_style: ROUND, MULTI HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-383-1996, 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
6658835
NSN: 5340-01-383-1996
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
body_thickness1.000 INCHES NOMINAL IN
inside_diameter6.500 INCHES NOMINAL IN
flange_thickness1.000 INCHES NOMINAL IN
outside_diameter7.500 INCHES NOMINAL IN
bolt_circle_diameter6.500 INCHES NOMINAL IN
peripheral_shape_styleROUND, MULTI HOLES
bolt_circle_hole_quantity6
first_recess_inside_height1.500 INCHES NOMINAL IN
cross-sectional_shape_styleCIRCULAR RECESS
material_document_and_classificationASTMD4181 131 0R 132 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-383-1996
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6658835 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: 1.000 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 6
•
FIRST RECESS INSIDE HEIGHT: 1.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTMD4181 131 0R 132 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 7.500 INCHES NOMINAL IN
•
INSIDE DIAMETER: 6.500 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 6.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS1.000 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY6
FIRST RECESS INSIDE HEIGHT1.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTMD4181 131 0R 132 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER7.500 INCHES NOMINAL IN
INSIDE DIAMETER6.500 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER6.500 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND, MULTI HOLES
BODY THICKNESS1.000 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6658835?
6658835 is a COVER,ACCESS.
What is the NSN for 6658835?
6658835 is cataloged in the U.S. Government catalog under NSN 5340-01-383-1996. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.