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Satin chrome double cylinder deadbolt with captive thumb-turn key, boxed

Mul-T-Lock

Mul-T-Lock HDC-26 Satin Chrome Hercular Double Cylinder Captive Key Deadbolt

SKU CH-5Q1F-AEGZG

High-security ANSI Grade 1 deadbolt with captive-key design that converts between single- and double-cylinder operation, adjustable backset, bump-proof cylinder.

  • Security gradeHeavy Duty
  • Grade1
  • Lock keyingKey Control
  • Surface finishSatin Chrome
  • Sold asBox
  • Product typeDeadbolts
  • ANSI Grade 1 certification delivers proven heavy-duty security
  • Captive key system switches between single and double cylinder modes
  • Bump-proof cylinder with UL437 drill and pick resistance
  • Adjustable backset fits 2-3/8" to 2-3/4" door preparations
  • UL fire-rated latch meets commercial safety requirements

High-security double-cylinder deadbolt

The Mul-T-Lock HDC-26 Hercular deadbolt provides ANSI Grade 1 protection with a captive key system. It operates as a single-cylinder lock when the thumb-turn key is inserted and converts to a double-cylinder lock when removed. The 006 keyway cylinder resists bumping, picking and drilling to UL 437 standards. A satin chrome finish completes the heavy-duty hardware.

Door preparation and key control

Verify the door thickness and backset fall within the adjustable 2-3/8 to 2-3/4 inch range before installation. The lock includes two keys and a key ID card for Mul-T-Lock's registered key control system. Ensure the UL fire-rated latch matches the door's fire rating requirements. Professional fitting is recommended for correct cylinder alignment.

Durability and daily operation

The Grade 1 mechanism withstands heavy residential or light commercial traffic without binding. Internal cylinders move smoothly during conversion between single and double-cylinder modes. Satin chrome resists tarnish and wear from frequent handling. No electronic components or batteries are involved, so operation remains consistent regardless of power status.

How it compares

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

Price $298.99
Pricier than about 90% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeDeadbolts
Size & build
Surface finishSatin Chrome
More details
Security gradeHeavy Duty
Grade1
Lock keyingKey Control

Questions about this item

Does the Mul-T-Lock HDC-26 include keys and a key ID card in the box?

Yes, the box contains two keys and a key ID card for the MUL-T-LOCK Key Control System; if the lock is ordered keyed alike, only one key is supplied.

Which keyway is used on the HDC-26 and how does it affect cylinder compatibility?

The lock uses the 006 keyway, so any additional cylinders or keys must match that specific keyway to operate with this deadbolt.

What does the ANSI Grade 1 and UL 437 rating mean for daily security on this deadbolt?

ANSI Grade 1 certifies the highest residential durability and strength, while UL 437 confirms the cylinder resists drilling and picking attacks in real-world use.

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