Von Duprin SS9975EO 3 643E LHR Grade 1 MTS 643E Exit Device

Von Duprin SS9975EO 3 643E LHR Grade 1 Mortise Exit Device 643E is engineered for superior functionality and reliability in commercial settings. This Grade 1 Mortise Exit Bar measures 36 inches and is designed as an exit-only device featuring a signal switch and a sound alarm touchbar. Its aged bronze finish adds an elegant touch while ensuring durability. The SS9975EO is suitable for all types of single or double doors, UL listed for panic exit hardware, and fits stock hollow metal doors with an 86 cutout and stiles as narrow as 4 3/4 inches. The device includes a 3/4-inch anti-friction latch bolt, easily reversible in the field without door removal, and a non-handed auxiliary bolt for enhanced deadlocking. This exit device is ANSI A156.3 – 2001 Grade 1 certified, making it a reliable choice for safety and compliance. It allows for various trim options and is designed for doors ranging from 28 to 36 inches in width and 1-3/4 to 2-1/4 inches in thickness. With a robust build and thoughtful design, the Von Duprin SS9975EO is an excellent solution for ensuring safe and efficient egress in commercial environments.

Grade 1 Mts Exit Device 643E

Grade 1 Mortise Exit Bar, 36" Device, Exit Only, Signal Switch, Less Dogging, Emergency Exit Only, Push to Open & Sound Alarm Touchbar, Aged Bronze Finish, Left Hand Reverse

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