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G300659 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

G300659: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include length: 42.0 MILLIMETERS NOMINAL MM, special_features: WIDTH 3.2MM AND HEIGHT 42.0 MM MM, end_item_identification: HG60G BALLAST WATERT TREATMENT SET, part_name_assigned_by_controlling_agency: COVER PLATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-661-6020, 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
G300659
NSN: 5340-01-661-6020
FSC: 5340 — Hardware, Commercial
CAGE: 29899 — CALGON CARBON UV TECHNOLOGIES LLC DBA HYDE MARINE (USA)
SPECIFICATIONS
length42.0 MILLIMETERS NOMINAL MM
special_featuresWIDTH 3.2MM AND HEIGHT 42.0 MM MM
end_item_identificationHG60G BALLAST WATERT TREATMENT SET
part_name_assigned_by_controlling_agencyCOVER PLATE
NSN5340-01-661-6020
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: G300659 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
•
LENGTH: 42.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
LENGTH42.0 MILLIMETERS NOMINAL MM
SPECIAL FEATURESWIDTH 3.2MM AND HEIGHT 42.0 MM MM
PART NAME ASSIGNED BY CONTROLLING AGENCYCOVER PLATE
END ITEM IDENTIFICATIONHG60G BALLAST WATERT TREATMENT SET
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is G300659?
G300659 is a COVER,ACCESS.
What is the NSN for G300659?
G300659 is cataloged in the U.S. Government catalog under NSN 5340-01-661-6020. 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.