ISO standards download ISO 23886:2021 pdf download – Aerospace — Collar, threaded, self-locking — Test method for torque and preload ISO 23886:2021 pdf download - Aerospace — Collar, threaded, self-locking — Test method for torque and preload. 1 Scope This document describes torque and preload test method for threaded collars. This test method is used to measure... 02-13 Download Now