|Screw or Bolt Size
82° finishing washers are used in non-structural interior and upholstery applications. The parts covered by NAS390 & NAS391 are getting harder to procure and do not necessarily conform exactly to all of the dimensions stated on the specs.
Brass, nickel plated.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
WASHER #NAS391B8P (39108C) (PACK OF 50)
I used this on a carbon fiber panel where I needed the surface area to hold the part and a clean finish (no fastner head to get hung up). Used in conjunction with Phillip head machine screws.
Great quality hardware at the right price
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Part # NAS391B4P is brass.
They are nickel plated brass, the photo is accurate. They look polished like in the photos.
Countersunk sits proud of the surface but the screw will countersink into the washer. Flush would be flush with the surface.
This measures to 0.467".