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Rockwood 557 Manual Lever Extension Flush Bolt for Wood Doors
The Rockwood 557 Manual Lever Extension Flush Bolt is a heavy-duty security solution specifically engineered for fire-rated wood and plastic-covered doors. Designed to secure the inactive leaf of a pair of double doors, this flush bolt ensures that your entryway remains code-compliant and secure. Unlike standard bolts, the Rockwood 557 features a unique corner reinforcing plate that maintains the structural integrity of the wood door at its most vulnerable point, preventing splitting and wear over time.
Architectural Grade Security & Fire Compliance
- UL Fire Rated: Certified for use on wood-covered fire doors up to 4'w x 10'h, with a fire rating of up to 1-1/2 hours.
- ANSI/BHMA Certified: Meets ANSI A156.16: L04261 standards, ensuring top-tier durability and smooth mechanical operation in commercial environments.
- Premium Cast Brass Construction: Available in high-quality US26D (Satin Chrome) and US3 (Bright Brass) finishes, providing both elegance and long-term corrosion resistance.
- Superior Reinforcement: Includes a specialized corner plate that strengthens the door’s edge, making it the preferred choice for high-traffic educational and healthcare facilities.
Installation & Technical Features
- Extended Bolt Throw: Features a 3/4" bolt throw and 3/4" backset for a deep, secure engagement into the head frame and floor strike.
- Standard Sizing: The 1" x 6-3/4" faceplate fits industry-standard door preparations, simplifying the retrofit or new installation process.
- Complete Hardware Package: Furnished with 7 ea. #8 x 3/4" combo screws, 4 ea. 8-32 machine screws, and 4 countersunk washers for a professional, flush-mount finish.
- Dust-Proof Protection: To ensure consistent performance, pair this with the Rockwood 570 Dust Proof Strike to prevent floor debris from obstructing the bottom bolt.
Technical Specifications
- Face Plate Size: 1" x 6-3/4"
- Strike Size: 15/16" x 2-1/4"
- Material: Cast Brass
- Finishes: US26D (Satin Chrome), US3 (Bright Brass). Other finishes like US10B and US26 are available via quote.
- Packaging: Priced as "each." (Standard installation requires two units per inactive leaf).
| General - US Finishes | US26D - Satin Chrome or US3 - Polished Brass or US10 - Satin Bronze or US10B - Oil Rubbed Bronze or US10BE - Oil Rub Bronze Equal |
| Brand | Rockwood |
| Bolt Type | Flush Bolt - Manual |
| Door Type | Wood Door |
| Fire Rated | Fire Rated |
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