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UL 437 8th Edition, May 15, 2013
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UL Standard for Safety Key Locks
Published By:UL (UL)
Page Count:20
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These requirements cover key locks categorized as follows and defined in Glossary, Section 3:

a) Cabinet locking cylinders,

b) Door locks,

c) Locking cylinders,

d) Security container key locks, Type 1 and Type 2, and

e) Two-key locks.

A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.