nylon anti-loosening rivet nut
The bottom nylon of the fastener can prevent thread wear, and the thread locking performance meets MIL-N-5027 standard.
A reusable, non-metallic prevailing torque thread lock. The strong knurled collar receives the installation force and resists torque. The spin resistance of the knurl greatly exceeds the torque that can be exerted by the self-locking feature. As the knurled collar is embedded in the sheet, the undercut cavity beneath the collar is filled with displaced sheet material, thereby captivating the fastener in the sheet.