NAS391-6P

WASHER
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About this product
The NAS391‑6P is a precision‑engineered plain washer manufactured from cadmium‑plated steel. It provides uniform load distribution under bolt heads and nuts, prevents loosening under vibration, and carries full traceability under a Manufacturer’s Certificate of Conformance for use in certified aircraft assemblies.
NAS391-6P Datasheet
UOM: EA
Stock Location: Dubai
Hazardous Item: Non-Hazardous Item
Lead Time: Stock
Certification: MANF COFC
8130/EASA Eligible: Yes
PRODUCT DESCRIPTION

NAS391-6P

  • Cadmium‑Plated Steel: Offers corrosion resistance in humid and fluid‑exposed environments.

  • Precision Thickness: ±0.02 mm tolerance ensures consistent clamp preload under fasteners.

  • High Hardness: Heat‑treated to resist deformation under cyclic bolt loads.

  • Standard AN Dimensions: Conforms to NAS391‑6P specs for immediate interchange with AN6 fasteners.


  • Distributes bolt loads on AN6 fasteners in primary wing structure assemblies.

  • Ensures consistent preload on strut and actuator bolts under repeated cycles.

  • Balances clamp force on titanium‑fastener joints during engine run‑ups.

  • Prevents pull‑through of panel screws in thin‑gauge electronics trays.


  • Is any lubrication required under the washer?

No, its cadmium plating provides low friction and prevents metal galling.

  • What environmental conditions can it withstand?

Designed to resist salt‑spray, humidity, hydraulic fluids, and standard cleaning solvents.

  • Is full trace documentation provided?

Absolutely, each washer ships with a Manufacturer’s CofC and serialized lot trace for EASA Form 1 eligibility.


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