Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST3M453-5-11 found under Bolt Close Tolerance by B And B Specialties Inc. The National Stock Number assigned to this part is 5306003263986, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST3M453-5-11.