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

Von Duprin 9975NL 4 US28 Grade 1 Mts Exit Device 628 is a top-tier solution for ensuring safe and reliable exits from commercial spaces. This Grade 1 mortise exit device boasts a robust 48-inch length and features a night latch function for enhanced security. Designed to fit stock hollow metal doors with an 86 cutout and narrow stiles as slim as 4 ¾ inches, it’s versatile enough for both single and double door applications. The 9975 series is UL listed for panic exit hardware, making it ideal for high-traffic areas. Its innovative design includes a ¾-inch anti-friction latch bolt that can be easily reversed without removing the lock from the door. With a non-handed auxiliary bolt for deadlocking and an adjustable bevel faceplate, installation is straightforward and efficient. The device also features hex dogging for added convenience. Constructed with a satin aluminum clear anodized finish, it seamlessly integrates with various door materials, including hollow metal, wood, and aluminum storefront doors. Meeting ANSI A156.3 – 2001 Grade 1 standards, this exit device ensures superior performance and reliability. The Von Duprin 9975NL is the perfect choice for those seeking safety, functionality, and aesthetic appeal in their exit hardware solutions.

Grade 1 Mts Exit Device 628

Grade 1 Mortise Exit Bar, 48" 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