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F166-940ITEM7 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

F166-940ITEM7: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL, outside_diameter: 4.193 INCHES NOMINAL IN, fsc_application_data: MARINE BOILERS, securing_device_type: THREADED FASTENER, peripheral_shape_style: ROUND, NO HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-862-9389, 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
F166-940ITEM7
NSN: 5340-00-862-9389
FSC: 5340 — Hardware, Commercial
CAGE: 11440 — GE STEAM POWER INC DBA GE STEAM POWER, INC DIV GENERAL ELECTRIC (USA)
SPECIFICATIONS
materialSTEEL
outside_diameter4.193 INCHES NOMINAL IN
fsc_application_dataMARINE BOILERS
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, NO HOLES
NSN5340-00-862-9389
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: F166-940ITEM7 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
•
FSC APPLICATION DATA: MARINE BOILERS
•
OUTSIDE DIAMETER: 4.193 INCHES NOMINAL IN
•
SECURING DEVICE TYPE: THREADED FASTENER
•
PERIPHERAL SHAPE STYLE: ROUND, NO HOLES
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAMARINE BOILERS
OUTSIDE DIAMETER4.193 INCHES NOMINAL IN
SECURING DEVICE TYPETHREADED FASTENER
PERIPHERAL SHAPE STYLEROUND, NO HOLES
MATERIALSTEEL
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 2
B164-074BReference document
Same NSN cross-reference
Reference document — Design control — primary reference
5-1ASWReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is F166-940ITEM7?
F166-940ITEM7 is a COVER,ACCESS.
What parts can replace F166-940ITEM7?
There are 2 known substitutes for F166-940ITEM7: B164-074B, 5-1ASW. Substitute compatibility should be verified for your specific system.
What is the NSN for F166-940ITEM7?
F166-940ITEM7 is cataloged in the U.S. Government catalog under NSN 5340-00-862-9389. 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.