BEST 21B Series Bronze Shackle Padlock with Removable Core - 5/16" Diameter
Professional Interchangeable Core Padlock System
The BEST 21B Series padlock features a standard removable core that integrates seamlessly with the entire BEST product line for comprehensive master keying capabilities. This bronze shackle padlock with 5/16" diameter construction provides reliable security with the flexibility of immediate rekeying at minimal cost through the interchangeable core system.
Professional Features & Benefits
- Interchangeable Core System: Standard removable core allows integration with most BEST product line for unified master key systems and future expansion capabilities.
- Immediate Rekeying: Interchangeable core design enables quick rekeying at minimal cost without replacing the entire padlock.
- Master Key Compatibility: STANLEY/BEST locks of any type, size or style can be masterkeyed into one comprehensive system.
- Durable Construction: Bronze shackle with 5/16" diameter provides reliable strength for security applications.
- Versatile Configuration Options: Available with key retained or non-key retained operation for different security requirements.
- Corrosion Resistance: Optional corrosion-resistant treatment available for demanding environmental conditions.
- Professional Accessories: Compatible with bronze or steel chains and special case embossing options for brass cases.
Technical Specifications

Installation & Operation
This padlock is designed for use with compatible BEST interchangeable core systems. Refer to manufacturer documentation for proper core installation and master key system integration. Ensure compatibility with existing BEST hardware before installation.
Professional Applications
- Commercial Building Security Systems
- Industrial Facility Access Control
- Educational Institution Security
- Healthcare Facility Equipment Protection
- Multi-Tenant Property Management
- Government and Municipal Applications
- Warehouse and Distribution Centers
Why Choose BEST Quality?
BEST padlocks deliver professional-grade security with interchangeable core technology that standardizes access control across entire facilities. The bronze shackle construction with 5/16" diameter provides dependable strength while the removable core system offers unmatched flexibility for master key expansion and cost-effective rekeying. Engineered for demanding commercial applications where reliable security and system integration are essential.
Manufacturer Resources
Product Specs
- Product Group:
- Other / Miscellaneous Hardware
- Product Subgroup:
- Padlocks
- Subcategory:
- Padlocks
- Product Type:
- Padlocks
- Shackle Width:
- 7/8"
- Product Lockbody Color:
- 626 - Satin Chromium Plated
- Product Category:
- Other / Miscellaneous Hardware
- Product Substrate:
- Stainless Steel
- Department:
- Door Hardware