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   BS +A 401-420:2015▹

   Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below ¼ inch) in various materials

   standard by BSI Group, 10/31/2015.

   Languages: English

   • 👥MULTI-USER

   Priced From:

   • $310 Secure PDF
   • $310 Printed Edition
   • $418 Printed Edition + PDF

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