BEST B56165 Throw Member Tailp...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.10
$3.58
BEST B56165 6- and 7-Pin Throw Member Tailpiece for 7K Series Cylindrical Locks

BEST B56165 Throw Member Tailpiece for 7K Series Cylindrical Locks - 6 and 7-Pin Compatible

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Model: B56165

In Stock (leaves warehouse same day if ordered before 3pm ET)

$4.10
$3.58
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BEST B56165 Throw Member Tailpiece for 7K Series Cylindrical Locks - 6 and 7-Pin Compatible

Professional Replacement Component for BEST 7K Series Locksets

The BEST B56165 throw member tailpiece is a precision-engineered replacement component designed specifically for BEST 7K Series cylindrical locksets. This tailpiece accommodates both 6-pin and 7-pin configurations, providing versatile compatibility for commercial lock maintenance and repair applications. Manufactured to BEST's exacting standards, this component ensures reliable operation and proper integration with existing 7K Series hardware.

Professional Features & Benefits

  • Universal Pin Compatibility: Accommodates both 6-pin and 7-pin configurations for flexible application across different 7K Series lockset variants.
  • Series-Specific Design: Engineered exclusively for BEST 7K Series cylindrical locksets ensuring precise fit and optimal performance.
  • Commercial-Grade Construction: Built to BEST commercial standards for reliable operation in demanding institutional and commercial environments.
  • Non-Handed Configuration: Universal design eliminates handing considerations for simplified inventory management and installation.
  • Precision Manufacturing: Manufactured to exact tolerances for smooth operation and long-term durability in high-use applications.
  • Professional Replacement Solution: Enables cost-effective lock maintenance without requiring complete lockset replacement.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Electronic: No
  • Handle Type: Lever
  • Keyed Function: Single Cylinder
  • Lock Type: Cylindrical
  • Product Category: Mechanical Locks
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Type: Knobs and Levers
  • Subcategory: Cylindrical

Installation & Operation

This replacement component is designed for use with compatible BEST 7K Series cylindrical locksets. Refer to the parent lockset installation instructions and manufacturer documentation for proper integration procedures. Ensure compatibility with existing hardware configuration before installation and verify proper pin count requirements for the specific application.

Professional Applications

  • Commercial Office Building Lock Maintenance
  • Educational Facility Hardware Service
  • Healthcare Institution Lock Repair
  • Government Building Security Maintenance
  • Industrial Facility Access Control Service
  • Multi-Tenant Property Management
  • Institutional Lock System Upgrades

Why Choose BEST Quality?

BEST throw member tailpieces deliver professional-grade reliability with precision manufacturing designed for commercial lock applications. Engineered specifically for BEST 7K Series compatibility, this component ensures dependable performance in demanding institutional environments where reliable access control is essential.

Manufacturer Resources

Key and Core Brochure

Product Specs

Subcategory:
Cylindrical
Handle Type:
Lever
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobs and Levers
Electronic:
No
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST B56165 – Frequently Asked Questions

1) What does the BEST B56165 throw member tailpiece actually do inside a 7K Series lock?
The throw member is the tailpiece that transfers rotation from the interchangeable core to the lock's retractor, so turning the key actually pulls the latch. The B56165 is the replacement part for BEST 7K Series cylindrical locksets. If a 7K lock keys smoothly but the latch does not retract, a worn or wrong throw member is the usual culprit, and swapping it beats replacing the whole lockset.
2) Will the BEST B56165 tailpiece work with a 7-pin core, or only 6-pin?
Both. The B56165 is built for 6-pin and 7-pin BEST small format interchangeable core configurations, so you order the same part whether the building is keyed on a 6-pin system or a 7-pin one. That matters for a facility running mixed pin counts across departments, since one part number covers the whole fleet.
3) Will the B56165 tailpiece fit a BEST 9K or 8K lockset?
It's a 7K Series part. BEST specifies the B56165 for 7K Series cylindrical locksets, and throw members are cut to the specific lock chassis they drive, so pull the lock and confirm it's a 7K before ordering. If the chassis is a different series, this is not the part.
4) Will the BEST B56165 throw member tailpiece work in a Cal-Royal Barrington or TownSteel cylindrical lock?
No. The B56165 throw member is engineered exclusively for BEST 7K Series cylindrical locksets and is sized to the 6-pin and 7-pin BEST core geometry. Cal-Royal Barrington BA series locks such as the BA05 storeroom and BA03 classroom, and TownSteel cylindrical locksets such as the CDC-109 clutched entry/office, are complete locks built around their own cylinder and throw arrangement, so a BEST 7K throw member is not a service part for them. If the worn lock in the door is not a BEST 7K, replace at the lock rather than the throw member.
5) The 7K lock body is worn out, not just the throw member - what full cylindrical lockset do I order instead?
When the chassis is the problem, a complete cylindrical lockset replaces the opening rather than servicing it. The Falcon K501 is a Grade 1 heavy duty entrance lock with push-turnbutton function, fire rated, covering doors 1-3/8 inch to 2-1/4 inch. The TownSteel CE/CEI-109 is a Grade 1 extra heavy duty non-clutched entry/office lockset, and the CEC/CECI-109 is the clutched version of that same entry/office function. The Cal-Royal BA00 entrance lock with turn/push button locking covers doors 1-3/8 inch to 1-3/4 inch. The BEST B56165 throw member is the repair path only when the 7K lockset itself is still serviceable.
6) Do I need a left-hand and right-hand version of the BEST 7K throw member?
No. The B56165 is non-handed, so one part covers doors of either swing. Nothing to specify on the order form and nothing to stock twice.
7) Is a tailpiece repair worth it, or should I just replace the whole cylindrical lockset?
If the chassis, lever and core are sound and only the throw member is worn, the B56165 puts a 7K lock back in service without touching the keying or the door prep. Replace the full lockset when the chassis itself is loose or the door is being upgraded, and at that point a Grade 1 cylindrical like the Falcon K501 or the TownSteel CE/CEI-109 is the class of lock you'd be moving to. For a light commercial opening, Cal-Royal's Barrington BA Series covers 1-3/8 inch to 1-3/4 inch doors in entrance, classroom, storeroom and communicating functions.
8) Can I use the BEST B56165 to repair a lock in a school or hospital that's on a master key system?
Yes, and the keying is untouched by the swap. The throw member sits behind the core, so the existing small format interchangeable core and its master keying come straight back out and back in. That is the point of the repair on institutional buildings: the door is back in service without re-issuing a single key. The lock is a commercial-grade component, rated by BEST for institutional and commercial service.
9) Do I need a different BEST throw member for a 6-pin core than for a 7-pin core?
No. The BEST B56165 throw member tailpiece accommodates both 6-pin and 7-pin configurations across 7K Series cylindrical locksets, so one part number covers a mixed 6-pin and 7-pin facility. It is non-handed as well, so left and right hand openings draw the same part. That is a component-level stocking decision and is separate from choosing a whole lock: a full lockset like the Cal-Royal BA04 communicating or BA05 storeroom is selected by its function, not by core pin count.
10) For a behavioral health or detention opening, is a BEST 7K with a replacement throw member the right approach or do I need different trim?
The B56165 throw member keeps an existing BEST 7K Series cylindrical lock in service and does not change the trim on the door. For an opening that requires ligature resistant trim, that is a lock-level decision: the TownSteel CRX-A-41 is a Grade 1 heavy duty stainless steel ligature resistant arch trim cylindrical lockset in single dummy function for 1-3/4 inch doors. Servicing a lever-trim 7K lock and specifying ligature resistant arch trim are two different scopes, so decide the trim requirement before ordering the repair part.
11) I am standardizing a building on one keyed function - does replacing throw members let me change the lock function?
No. The BEST B56165 throw member restores the drive between core and latch on a 7K Series cylindrical lock; it is a single cylinder keyed component and does not convert an entrance lock into a classroom or storeroom lock. Function is set by the lockset. Cal-Royal Barrington offers separate part numbers per function - BA03 classroom to ANSI F84, BA04 communicating to ANSI F80, BA05 storeroom to ANSI F86 with deadlocking latch, all Grade 2 and all for 1-3/8 inch to 1-3/4 inch doors. Standardizing a facility on a function means specifying locksets, not throw members.
12) Is the BEST B56165 tailpiece an electronic or mechanical lock part?
Purely mechanical. The B56165 serves BEST 7K mechanical cylindrical locks with a single cylinder keyed function, so there is no wiring, no power supply, and no credential reader involved. Buildings running electrified access control on the same openings need the parts for that chassis instead.
13) What lever or knob trim does the BEST 7K lockset with this throw member use?
The 7K Series openings this part serves are lever trim, which is what most commercial and institutional buildings specify for accessibility. The throw member itself is behind the trim and does not change what lever you have on the door, so nothing about the outside appearance of the lock changes with this repair.
How fast can I get the BEST B56165 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 BEST B56165 come with a warranty?
Absolutely. The BEST B56165 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 BEST B56165?
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 BEST B56165 from ZenSupply?
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