Von Duprin 9975EO 3 643E Grade 1 MTS 643E Exit Device

Von Duprin 9975EO 3 643E Grade 1 Mts Exit Device offers a robust and reliable solution for panic exit hardware. Designed as a Grade 1 Mortise Exit Bar, this 36-inch device features exit-only functionality, hex dogging, and an appealing aged bronze finish that complements various architectural styles. Its field-reversible design allows for easy installation on both single and double doors, fitting stock hollow metal doors with an 86 cutout and stiles as narrow as 4 3/4 inches. The 9975 Series is UL listed for safety, ensuring compliance with stringent standards for panic exit hardware. It is equipped with a durable 3/4-inch anti-friction latch bolt, which can be reversed without removing the lock from the door. This device also includes a non-handed auxiliary bolt for enhanced security and deadlocking, along with an adjustable bevel faceplate for versatile applications. With its ANSI A156.3 – 2001 Grade 1 rating, the Von Duprin 9975EO is suitable for commercial installations, accommodating door thicknesses from 1-3/4 inches to 2-1/4 inches. The device’s easy installation and reliable performance make it an ideal choice for various settings, ensuring safe and efficient emergency exits.

Grade 1 Mts Exit Device 643E

Grade 1 Mortise Exit Bar, 36" Device, Exit Only, Hex Dogging, Aged Bronze 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