S1. Purpose and scope. This standard specifies requirements for seat belt assemblies. S2. Application. This standard applies to seat belt assemblies for use in passenger cars, multipurpose passenger vehicles, trucks, and buses. S3. Definitions. Adjustment hardware means any or all hardware designed for adjusting the size of a seat belt https://platedream6.bloggersdelight.dk/2025/02/24/the-5-second-trick-for-webbing-safety-belt/