Master Lock Door Locks - BC Series, Grade 3 Biscuit Knob Keyed Entry
- Entry Door Lock
- Six-way adjustable latch fits all doors: 2-3/8in (60mm) or 2-3/4in (70mm) backset, square, rounded corners, or drive-in
- ANSI Grade 3 performance
- For exterior locking applications, Entry door - KA4
- Operates with SC1 Cylinder
Manufacturer Resources
Product Specs
- Subcategory:
- Deadbolts
- Series:
- BC Series
- Grade:
- Grade 3
- Keyed:
- Yes
- Product Group:
- Mechanical Locks
- Product Subgroup:
- Bored Locksets
- Product Type:
- Knobsets
- Commercial/Residential:
- Residential
- Product Attribute:
- Cylindrical Locks
- Tags:
- 3 3 4 inch backset doorknob
- Product Model:
- BC01
- Backset (Distance):
- 2-3/8 or 2-3/4
- Product Function:
- Entrance
- Cylinder Classification:
- Conventional Cylinder
- Product Category:
- Mechanical Locks
Master Lock BC0115KA4 – Frequently Asked Questions
1) What applications is the Master Lock BC Series door knob designed for?
The BC Series is designed for residential and light commercial entry doors. Grade 3 rating makes it suitable for homes, apartments, and low-traffic commercial spaces. Not recommended for high-security or heavy-duty commercial applications.
2) What door thickness and backset does this knob accommodate?
Standard door thickness is 1-3/8" to 1-3/4". Typically comes with 2-3/8" backset, which is most common for residential doors. Verify your door specifications before installation to ensure proper fit.
3) How do I determine the correct handing for installation?
Stand outside the door (secure side). If hinges are on your right, it's right-handed. If hinges are on your left, it's left-handed. The BC Series knob can be adjusted for either handing during installation.
4) What finish is the biscuit color and how durable is it?
Biscuit is a warm, off-white finish that complements traditional and contemporary decor. The finish is designed for normal indoor use. For high-traffic areas or exterior exposure, consider upgraded finishes with enhanced durability ratings.
5) What does Grade 3 security rating mean for this lock?
Grade 3 is the basic ANSI/BHMA security level for residential use. It provides standard security for homes but lower protection than Grade 1 or 2 locks. Suitable for interior doors or low-risk entry points.
6) How many keys come with the keyed entry knob?
Typically includes 2 keys. Additional keys can be cut by locksmiths using the key code provided. Keep the key code in a secure location for future key duplication needs.
7) What hardware is included for installation?
Includes knob assembly, latch bolt, strike plate, and mounting screws. Installation template may be included. Verify door preparation matches the provided template before drilling or cutting.
8) Can this knob be installed on a pre-bored door?
Yes, designed for standard pre-bored doors with 2-1/8" cross bore and 1" edge bore. If installing on solid door, use proper hole saw and drilling techniques. Follow manufacturer template for precise measurements.
9) How do I maintain and adjust the door knob operation?
Periodically lubricate moving parts with graphite or silicone spray. Avoid oil-based lubricants that attract dirt. Tighten mounting screws if knob becomes loose. Clean finish with mild soap and soft cloth.
10) Are there matching deadbolts available in the BC Series?
Yes, Master Lock offers matching deadbolts in the BC Series with the same biscuit finish. Check our Master Lock section for coordinating deadbolts and hardware to create a complete entry set.
11) What door weight limits should I consider for this knob?
Grade 3 knobs are designed for standard residential doors up to typical weight limits. Heavy solid wood or steel doors may require Grade 2 or commercial-grade hardware for optimal performance and longevity.
How fast can I get the Master Lock BC0115KA4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Master Lock BC0115KA4 come with a warranty?
Absolutely. The Master Lock BC0115KA4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Master Lock BC0115KA4?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Master Lock BC0115KA4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.