The Rockwood 555 Lever Extension Flush Bolt provides a strong, fire-rated solution for hollow metal swinging doors. First, it meets ANSI A115 door and frame standards. As a result, installers can use it with confidence in commercial and industrial settings.

Next, this flush bolt supports fire-rated openings up to 4 feet wide by 10 feet high and up to 3 hours. At the same time, the smooth lever lets users lock and unlock the door with ease. Because the bolt uses solid brass, it delivers long-lasting strength. In addition, bronze and stainless steel options offer more finish choices.

Product Features:

• For fire-rated hollow metal swinging doors up to 4’W x 10’H (up to 3-hour rating)
• Fits ANSI A115 door and frame preparation
• 3/4″ bolt throw with 3/4″ rod backset
• Standard 12″ rod length (center of face to bolt end, retracted)
• Adjustable 1-1/2″ bolt head (strike guide must be removed to adjust)
• Optional rod lengths: 18″, 24″, 36″, and 48″
• Optional extra-long bolt head: 2-1/2″ (or custom length)
• Compatible with #570 Dust Proof Strike to prevent debris from blocking the bottom strike

Specifications:

• Base Material: Brass, Bronze, or Stainless Steel
• Fasteners: (8) #8 x 3/4″ Flat Head Combo Screws
• Weight: 0.75 lbs
• Bolt Throw: 3/4″
• Faceplate Size: 1″ W x 6-3/4″ L
• Guide Size: 1″ W x 2″ L
• Strike Size: 15/16″ W x 2-1/4″ H

Overall, this flush bolt offers strong performance, code compliance, and flexible sizing options. Therefore, it is a smart choice for fire-rated metal door installations.