A method for treating a sulfur-containing fabric and sulfur-containing fabrics with excellent antimicrobial properties are disclosed. The expandable bolt device comprises a bolt and a locking device near a distal end of the bolt, the locking device being movable radially between an outward locked position and an inward unlocked position by moving the bolt axially with respect to the locking element. The process uses fewer steps than conventional processes. When the contact mount is in the open position, the bracket overhangs the at least one section of the at least one contact force spring.