Existing records show 91 - 535 is likely a circuit board spacer and support from Bivar Inc, part of its 900 product series. It is a critical small component for electronic assembly in aerospace and automotive fields.

Featuring a round, unthreaded, female - to - female design, it has an outer diameter of 6.35mm, an inner diameter of 3.18mm and an overall length of 13.59mm. Made of nylon, it is natural - colored with no coating, offering good insulation and wear resistance.

Its core function is to maintain a 13.59mm spacing between circuit boards, ensure stable wiring, and protect components from friction. Lightweight and easy to install, it suits electronic device maintenance and assembly, enhancing the operational stability of circuit systems.