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Polished brass double cylinder deadbolt with captive key mechanism

Mul-T-Lock

Mul-T-Lock HDC-05-206 Hercular Double Cylinder Captive Key Deadbolt Brass

SKU CH-KS8W-41MTT

A captive-key deadbolt that switches between single- and double-cylinder operation using a removable thumb-turn key, finished in polished brass

  • Surface finishPolished Brass
  • Sold asEach
  • Product typeDeadbolts
  • Captive key design enables quick keyless exit from inside
  • Double cylinder conversion adds security when premises are unoccupied
  • Interactive+ mechanism provides patented key control against unauthorised duplication
  • 206 keyway supports restricted key management for enhanced access control
  • Polished brass finish resists corrosion while complementing traditional door hardware

What the captive-key deadbolt does

The Mul-T-Lock HDC-05-206 Hercular is a high-security deadbolt with an Interactive+ cylinder and a 206 keyway. Its captive key mechanism lets the inside cylinder accept either a thumb-turn key for single-cylinder operation or a standard key for double-cylinder locking. This flexibility suits homeowners who want quick egress most of the time but the option to secure both sides when the property is vacant.

Capacity and headroom of the 206 keyway

The 206 keyway works with the Interactive+ platform to provide patented key control; duplication requires a key order card presented to an authorised dealer. The cylinder resists picking, drilling and bumping, so it handles forced-entry attempts well. It does not suit projects that need electronic access, master-key suites beyond the Interactive+ system, or a different keyway profile.

Thermals, noise and power draw in normal use

As a purely mechanical lock, the deadbolt draws no power and generates no heat or audible noise during locking or unlocking. The brass finish and internal components are designed for repeated daily cycles without lubrication-related wear. There are no electronic parts to fail, so the lock remains operational during power outages or extreme temperatures.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $333.99
Pricier than about 90% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeDeadbolts
Size & build
Surface finishPolished Brass

Questions about this item

Will the captive-key mechanism fit a standard 5-pin cylinder cutout in my existing door?

The Hercular uses the 206 keyway and Interactive+ cylinder, so it requires the matching bore dimensions for that profile rather than a generic 5-pin cutout.

How do I verify the Interactive+ double-locking action is engaging correctly after installation?

Turn the key on both sides; the bolt should throw fully and the interior thumb-turn key must lock into place when inserted in the central cylinder, confirming the captive function.

Does the package include the special thumb-turn key and the standard key for the 206 keyway?

The captive thumb-turn key and a standard Interactive+ key for the 206 keyway are supplied; no additional keys or cylinders need to be purchased separately.

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