Master Lock BLC0232DKA4 Storeroom Cylindrical Ball Knob – Grade 2, Brushed Chrome

Overview

Upgrade secure storage with the Master Lock BLC0232DKA4 storeroom cylindrical ball knob. Finished in brushed chrome, this commercial-grade lockset blends straightforward operation with durable design for busy storage areas. The knob can be operated from the inside or outside, where the outside knob remains locked while the inside knob stays open for quick access at the end of a shift. A bump-resistant six-pin cylinder helps resist common tampering, while the cylindrical construction emphasizes lasting reliability in high-traffic environments.

Durability, Standards, and Warranty

Built for daily use, this knob features a robust cylindrical construction and a 2-3/4 inch fixed backset latch. It carries a 3-hour UL listing and meets ANSI/BHMA A156.2, Grade 2 standards, delivering solid value for commercial doors. The product comes with a 10 Year Limited Lifetime Warranty, reflecting Master Lock’s commitment to long-term performance.

Key specifications

• Brushed chrome finish; clean, professional look
• Door thickness fit: 1-3/8 to 1-3/4 inches
• Backset: 2-3/4 inches (70 mm); Crossbore: 2-1/8 inches
• Six-pin cylinder compatible with Schlage C standard
• Includes two keys for immediate access
• 3-hour UL listing; fire-rated compatibility through standards

Real-world use and benefits

Picture a bustling storeroom or supply closet where staff move quickly between shifts. The inside knob remains free for fast entry, while the outside knob stays locked until a key is used, helping prevent unauthorized access after hours. The bump-stop technology adds resilience against routine bumps and wear, helping maintenance teams keep doors functioning smoothly over time.

Ideal applications

• Storerooms, supply closets, and back-of-house doors in offices or light industrial spaces
• Facilities that require reliable Grade 2 hardware with straightforward operation