Features

• Device fully conceals flange bolts preventing access to the blind until all work has been completed
• Adjustable device provides a tight fit, adapting to multiple flanged pipe applications
• Recommended for use with nut diameter from 1-5/16in to 1-7/8in (33.3mm – 47.8mm)
• Four lockout holes allow for multiple workers to lockout device at one time
• Durable aluminum and hardened steel construction withstands conditions indoors and out

The Master Lock No. S3923 Blind Flange Lockout device is a physical, best practice solution for pipeline maintenance. The adjustable cup allows for a secure fit that conceals and locks out access to nuts holding a blind in place. Workers can perform maintenance with confidence that the blind they placed on a pipeline will not be removed until all workers have removed their padlocks. 4 locking holes allow for multiple workers to lockout device at one time.