Design Hardware BB5 NRP – 4.5″ x 4.5″ NRP Ball Bearing Hinge (Non-Removable Pin)

Design Hardware 4-1/2 x 4-1/2 Full Mortise Five Knuckle Commercial Hinges, Standard Weight, Non-Removable Pin

The long lasting linchpin for your door

• Ball bearing reduces friction to extend lifetime of hinge
• For medium weight doors of average frequency use
• More durable than standard hinges
• Meets ANSI A 156.2 – Dimensions and tolerances conform to ANSI – A156.7
• Design & Templating: 5 Knuckle Design & Templated hole locations for wood or metal doors & frames
• Fire Door Use: Approved for most types of fire doors up to 4’ x 10’, 8’ x 10’ pairs – Refer to NFPA80
• Swaging: 1/16” Swage standard which provides 1/16” of clearance between leaves
• Security NRP: NRP – Non removable pin