Intro
The Superior Brass Knob Lock CC 57mm Polished Brass 150x42mm is a classic entrance knob solution designed to suit traditional 57mm sash locks. Crafted from solid brass and engineered with a patented stainless steel ball bearing mechanism, it delivers smooth, reliable performance. With a refined polished brass finish and 4-hour fire rating, it blends heritage styling with modern compliance.
Key Features & Benefits
✅ Function Entrance knob lock set
✅ Finish Polished Brass
✅ Material Solid Brass
✅ Compatibility Suits 57mm sash locks
✅ Mechanism Patented stainless steel ball bearing race for smooth, friction-free operation
✅ Fire Rating Fire rated up to 4 hours
✅ Durability Heavy-duty construction for long service life
Specifications
• Unit of Measure Pair
• Size 150x42mm
• Centre to Centre 57mm
• Projection 73mm
• Base Material Solid Brass
• Finish Polished Brass
• Mechanism Stainless steel ball bearing
• Fire Rating 4 Hours
• Item Status Punched in-house from passage set
• Brand Superior Brass
Applications
Ideal for entrance and internal doors requiring sash lock security in residential homes, heritage restorations, apartments, and light commercial interiors. The polished brass finish complements traditional, federation, and classic design schemes.
Installation & Inclusions
• Suitable for professional installation or experienced DIY fitting
• Designed to integrate with standard 57mm sash locks
• Supplied as a complete entrance knob lock set
Available Finishes
• Polished Brass
Why Choose Superior Brass
Superior Brass is known for authentic design, premium materials, and dependable engineering. This knob lock provides smooth operation, fire-rated assurance, and timeless style for doors that demand both performance and elegance.
👉 This is an entrance knob lock set designed to suit 57mm centre-to-centre sash locks.
Q2. What material is the knob lock made from?
👉 It is manufactured from solid brass, offering durability, strength, and a premium traditional feel.
Q3. Is this knob lock fire rated?
👉 Yes, it is fire rated for up to 4 hours, making it suitable for compliant door installations.
Q4. What warranty applies to this product?
👉 As a lock product, it includes a 10 Years mechanical warranty and a 5 Years finish warranty, covering defects in materials and workmanship under normal residential use when correctly installed.
Q5. What lock type is required for installation?
👉 This knob lock is designed to be used with standard 57mm sash locks. Compatibility should be confirmed prior to installation.
Payment & Security
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