Cylindrical Grade 1 Extra Heavy Duty Knob, Non-keyed

Passage function

Item no. 911.79.521

    Passage function

    Item no. 911.79.521

    Item no. 911.79.521


    Requested amount is in stock.
    Limited stock available.
    Item no longer available

    Call us at 800.423.3531 if you have questions about availability.

    Piece Min. 1
    See Required Products
    Item details


    Designed for extra heavy duty commercial, industrial and institutional applications


    No exposed mounting screws
    • Knobs include steel reinforcement
    • Heat-treated heavy gauge cold rolled steel spindles add strength and security
    • The threaded outside rose assembly is adjustable for door thickness
    • Internal steel mechanisn is heat-treated



    For door width

    (1 3/8 - 2”) 35 - 52 mm
    • Strike: ANSI 4 7/8” x 1 1/4” (123 mm x 32 mm) strike standard
    • Roses: Ø2 3/4” (70 mm) Stainless Steel or Brass base metal
    • Handing: Non-handed
    • Latchbolt: Stainless Steel 17/32” (13.5 mm) throw standard; 3/4” (19 mm) throw available
    • Cylinder: Solid Brass 6-pin cylinder Schlage C keyway with two keys per lock
    • IC Core: Solid Brass 6 or 7-pin core sold separately
    • Keying: Keyed different (KD) standard, available master keyed (MK), keyed alike (KA) and construction master keyed (CMK), see keys and keying section for additional options
    • Certifications: ANSI/BHMA certified A156.2 Series 4000 Grade 1; cUL/UL Listed for all functions up to 3 hours


    2 3/4” (70 mm) standard 2 3/8” (60 mm) available


    Stainless Steel or Brass, 2 1/4” x 1 1/8” (57 mm x 29 mm)


    630 stainless steel satin (US32D)
    Corporate Office: Häfele America Co., 3901 Cheyenne Drive, Archdale, N.C. 27263
    Phone: 800.423.3531, Fax: 800.325.6197, Local Phone: 336.434.2322, Email:

    Cylindrical Grade 1 Extra Heavy Duty Knob, Non-keyed

    Passage function


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