Von Duprin 9975EO 4 US28 Grade 1 MTS Exit Device 628

Von Duprin 9975EO 4 US28 Grade 1 Mortise Exit Device 628 is designed for reliability and security in commercial applications. This Grade 1 mortise exit bar measures 48 inches and is crafted for exit-only functionality, featuring hex dogging for enhanced security. Its satin aluminum clear anodized finish offers a sleek look while ensuring durability. The 9975 series is UL listed for panic exit hardware, making it suitable for various single or double door configurations. It fits stock hollow metal doors with an 86 cutout and accommodates door stiles as narrow as 4 3/4 inches. The device includes a 3/4-inch anti-friction latch bolt that is field reversible without needing to remove the lock from the door, providing flexibility during installation. With ANSI A156.3 – 2001 Grade 1 certification, this exit device meets stringent safety standards. It includes a non-handed auxiliary bolt for deadlocking and features an adjustable bevel faceplate. The device is compatible with door thicknesses of 1 3/4 to 2 1/4 inches and can be installed on wood, aluminum, or hollow metal doors. Choose the Von Duprin 9975EO for a dependable exit solution that prioritizes safety in high-traffic environments.

Grade 1 Mts Exit Device 628

Grade 1 Mortise Exit Bar, 48" Device, Exit Only, Hex Dogging, Satin Aluminum Clear Anodized Finish, Field Reversible

9875/9975 Mortise lock device for all types of single or double doors, UL listed for panic exit hardware. Fits stock hollow metal doors with 86 cutout and door stiles as narrow as 4 3⁄4" (121mm). The 7500 Mortise lock is equipped with a 3⁄4" (19mm) anti-friction latch bolt which is field reversible without removing the lock from the door. It has a non-handed auxiliary bolt for deadlocking and a faceplate with an adjustable bevel.

Devices are ANSI A156.3 – 2001 Grade 1

The 9975 Series is for all types of single or double doors and is UL listed for panic exit hardware.  Fits stock hollow metal doors with 86 cutout and door stiles as narrow as 4 3 /4" (121mm). 

• Device functions: Device ships EO/DT/NL. Field selectable. For TP, K or L remove NL drive screw from device.
• Device lengths: 3' 2'4' to 3' (711mm to 914 mm) Door size 4' 2'10" to 4' (864 mm to 1219 mm) Door size
• Device centerline from finished floor: 39 13/16" (1011 mm) 39 11/16" (1008 mm) with mullion
• Center case dimensions: 8" x 2 3/4" x2 3/8" (203mm x 70mm x 60mm)
• Mechanism case dimensions: 2 1/4" x 2 1/4" (57mm x 57mm)
• Projection: Pushbar neutral – 3 13/16" (97 mm) Pushbar depressed – 3 1/16" (78 mm)
• Fasteners & sex bolts (SNB): Includes screw pack for 1 3/4" (44mm) and 2 1/4" (57mm) thick metal or wood do

Resources

• 10 Things You Need to Know About the Von Duprin Chexit
• 98/9975-2 Series Wood Door Template
• 990TP/TP-BE/NL Trim 98/9975 Mortise Lock Device Installation Instructions
• QEL Data Sheet
• Von Duprin Finishes Chart