Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS-PPH04400250 LN found under Screw Machine by B And B Specialties Inc. The National Stock Number assigned to this part is 5305013517713, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SS-PPH04400250 LN.