• Heavy duty commercial
• Industrial
• Institutional

2-3/4" (70 mm) only

• BHMA Certified ANSI A156.13, Series 1000, Grade 1
• ADA Compliant ANSI A117.1 Accessibility Code
• BHMA Certified Grade 1 Security with standard mortise cylinder

• Brass - keyed different - Schlage C keyway - standard
• Drilled 6-Pin, Keyed 5-Pin - standard
• Other keying options, including keyed 6-pin, available from factory
• Zero bit cylinders will be 6 pin keyed - standard
• Small Format Interchangeable Core cylinde

1" (25 mm) throw - stainless steel

• 1-3/4" - 2-1/2" (45 mm - 64 mm)
• 1-3/4" - 2" (45 mm - 51 mm) for Classroom Function (3863)
• Must specify door thickness if greater than 1-3/4" (45 mm) or door has an offset prep

• Self-adjusting case for beveled doors
• Non-handed

• US3, US4, US10B, US26, US26D
• US3, US4, US10B, and US26 subject to extended lead time

• 60 - Cylinder x Thumbturn
• 62 - Double Cylinder
• 63 - Classroom
• 64 - Cylinder

3991  1-1/4" x 4-7/8" (32 mm x 124 mm) No lip - standard

Lifetime warranty