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660-023N21F6-04 — CAP-PLUG,PROTECTIVE,DUST AND MOI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

660-023N21F6-04: CAP-PLUG,PROTECTIVE,DUST AND MOI.

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: ALUMINUM, thread_length: 0.30 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, end_item_identification: 3895-01-640-6454, part_name_assigned_by_controlling_agency: PROTECTIVE COVER. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-671-6693, 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
660-023N21F6-04
NSN: 5340-01-671-6693
FSC: 5340 — Hardware, Commercial
CAGE: 06324 — GLENAIR, INC. (USA)
SPECIFICATIONS
materialALUMINUM
thread_length0.30 INCHES NOMINAL IN
thread_directionRIGHT-HAND
end_item_identification3895-01-640-6454
part_name_assigned_by_controlling_agencyPROTECTIVE COVER
NSN5340-01-671-6693
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 660-023N21F6-04 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
•
THREAD LENGTH: 0.30 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: ALUMINUM
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.30 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
PART NAME ASSIGNED BY CONTROLLING AGENCYPROTECTIVE COVER
END ITEM IDENTIFICATION3895-01-640-6454
MATERIALALUMINUM
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 1
98006A0273Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 660-023N21F6-04?
660-023N21F6-04 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace 660-023N21F6-04?
There is 1 known substitute for 660-023N21F6-04: 98006A0273. Substitute compatibility should be verified for your specific system.
What is the NSN for 660-023N21F6-04?
660-023N21F6-04 is cataloged in the U.S. Government catalog under NSN 5340-01-671-6693. 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.