Von Duprin 9975NL 3 US28 Grade 1 MTS Exit Device 628

Von Duprin 9975NL 3 US28 Grade 1 Mts Exit Device 628 is a robust and reliable solution for panic exit situations, designed for both single and double doors. This Grade 1 Mortise Exit Bar features a 36-inch device length and a night latch function, ensuring secure and efficient egress. Its satin aluminum clear anodized finish not only provides a modern aesthetic but also enhances durability in high-traffic environments. Engineered to fit standard hollow metal doors with an 86 cutout, the device accommodates door stiles as narrow as 4 3/4 inches (121mm). The anti-friction latch bolt, measuring 3/4 inch (19mm), is field-reversible, allowing for easy adjustments without the need to remove the lock from the door. Featuring hex dogging for added security, this exit device meets ANSI A156.3 – 2001 Grade 1 standards. The device is suitable for commercial installations and supports door thicknesses from 1-3/4 inches to 2-1/4 inches. With its innovative design and reliable performance, the Von Duprin 9975NL exit device is an ideal choice for ensuring safe and efficient exits in commercial spaces, backed by a limited three-year warranty for peace of mind.

Grade 1 Mts Exit Device 628

Grade 1 Mortise Exit Bar, 36" Device, Night Latch Function, Escutcheon Pull Trim, 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