Material: Carbon Steel Type 1016 - 1024
Finish: Nickel Plate
Download the NAS387 Spec (PDF)
These screws fit the K1000-3 nut plates.
Seem to be well made. They look good.
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.
Per the spec sheet, the "P" means chrome plate or nickel optional. Ours are listed as nickel plated.