To guarantee Knobs And Levers items of the highest caliber, we go above and beyond industry expectations with rigorous quality control practices. For example, all fasteners and hardware parts are strictly sourced from leading manufacturers that we have vetted, such as Electronic Hardware Corp and others. Furthermore, countless listings are inspected and tested for fit, form, and function, and our strict NO CHINA SOURCING pledge ensures that everything ships out alongside any qualifying certifications or manufacturing trace documentation. Coupled with other various dedications, we proudly conduct operations with AS9120B, ISO 9001:2015, and FAA AC 00-56B accreditation. Kick off procurement today for part number TL8508-31BBA4 and other The Tl Series Is Our Large Tactile Series Of Knobs. The Knobs Design Is Based On The Ms91528 Tactile Series Of Knobs, Which Not Only Gave The User A Unique Tactile Feel But Also Were Color Coded. For Avionic Equipment Color Coding Was Not Practical. This Exact Same Series Of Knobs Has Been Duplicated In A Smaller Size (See Our Ts Series). With Avionics Equipment Constantly Shrinking In Order To Fit More In The Cockpit, A Small Size Knob Was Desirable. These Units Belong To The Ms 21385 Series Of Knobs. Ehc Meets The Requirements Of The Ms Specification And The Government Drawing Requirements. All Of Our Backlighted Knobs Can Be Manufactured For Night Vision Use. Our Knobs Meet Nvis Green A Requirements. items of interest, and see how we at Unlimited Fasteners can serve you.