PartsTable
Technical Data Sheet
Download PDF

667-256-14 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

667-256-14: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include design_type: THREADED, surface_treatment: NICKEL, end_item_identification: 1025-01-445-0991, 155MM HOWITZER, MEDIUM, TOWED MM, part_name_assigned_by_controlling_agency: PLUG COVER. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-566-6916, 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
667-256-14
NSN: 5340-01-566-6916
FSC: 5340 — Hardware, Commercial
CAGE: 06324 — GLENAIR, INC. (USA)
SPECIFICATIONS
design_typeTHREADED
surface_treatmentNICKEL
end_item_identification1025-01-445-0991, 155MM HOWITZER, MEDIUM, TOWED MM
part_name_assigned_by_controlling_agencyPLUG COVER
NSN5340-01-566-6916
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 667-256-14 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
•
DESIGN TYPE: THREADED
•
SURFACE TREATMENT: NICKEL
TECHNICAL CHARACTERISTICS
DESIGN TYPETHREADED
SPECIAL FEATURESMATERIAL IS COMPOSITE;SPECIFIC FINISH IS ELECTROLESS NICKEL;SHELL SIZE IS ELEVEN;INCLUDES 4.000 INCH SASH CHAIN;INCLUDES SPLIT RING SIZE 54 WITH 0.640 ID;INCLUDES 4-40 X 7/16 SCREW AND MS21044C04 LOCKNUT IN
SURFACE TREATMENTNICKEL
PART NAME ASSIGNED BY CONTROLLING AGENCYPLUG COVER
END ITEM IDENTIFICATION1025-01-445-0991, 155MM HOWITZER, MEDIUM, TOWED MM
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
Ready to buy 667-256-14?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 667-256-14?
667-256-14 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 667-256-14?
667-256-14 is cataloged in the U.S. Government catalog under NSN 5340-01-566-6916. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 667-256-14

✓ 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.