BIS Certification for Indicating Bolts for Use in Public Baths and Lavatories – IS 4621:1975
Introduction Indicating bolts are specially designed door-locking mechanisms used in public baths and lavatories to indicate whether a toilet or washroom is occupied or vacant. These bolts are commonly found on doors in places such as public washrooms, railway coaches, aircraft, malls, commercial buildings and other high-traffic facilities. IS 4621:1975 specifies requirements for indicating bolts […]
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