Union Black Stainless Steel Ball-Bearing Butt Hinge 4″ x 3″ x 3mm – HN-2BB-403030-BLK

The Union Black Stainless Steel Ball-Bearing Butt Hinge 4″ 3″ 3MM HN-2BB-403030-BLK is a Grade 304 stainless steel two-ball-bearing butt hinge in a black finish, sized 4″ 3″ 3MM, rated for internal wooden fire doors up to 40KG and tested to 200,000 cycles for residential, hospitality, office and commercial projects where smooth, long-lasting door movement and a black architectural finish are required. It is suited to installers hanging compatible timber doors and matching existing hinge recesses, using the correct number of hinges and fixings for the door weight and application.

Key Features:

• Two ball bearings reduce friction for smoother opening and closing on frequently used doors.
• Rated for internal wooden fire doors up to 40KG and tested to 200,000 cycles for reliable long-term performance.
• Grade 304 stainless steel construction provides strength and corrosion resistance in demanding residential and commercial environments.
• Black finish coordinates with contemporary door hardware and suits modern interior schemes.
• Standard 4″ 3″ architectural size simplifies matching with compatible door and frame preparations.

Specifications:

• Product Type: Ball-bearing butt hinge
• Model: HN-2BB-403030-BLK
• Material: Grade 304 stainless steel
• Finish: Black (BLK)
• Size: 4″ 3″ 3MM
• Ball Bearings: 2
• Maximum Door Weight: 40KG
• Cycle Rating: 200,000 cycles
• Suitable Door Type: Internal wooden fire doors