Parfait double key 6 turn dead lock

The Parfait Double Key 6 Turn Dead Lock is a precision-engineered, maximum-security rim lock. It features the uncommon and strategically significant configuration of key-operated access from both the exterior AND interior faces.

Unlike conventional deadlocks that provide an interior thumb-turn for rapid egress or single-sided key operation, this Parfait double key 6 turn dead lock requires a key to lock or unlock from either side of the door. This is a deliberate security architecture designed for applications where uncontrolled interior exit presents an equal or greater security risk than exterior intrusion.

Each complete locking or unlocking cycle requires six full revolutions of the key—2160 degrees of rotational travel. Parfait double key 6 turn dead lock  delivers the same industry-leading manipulation resistance and mechanical advantage as the ABK-6 platform, now with the enhanced control of double-key operation.

The massive 30mm through-hardened chromoly steel deadbolt, reinforced Zamak 5 lock case, and 6-pin anti-drill anti-pick cylinder system position this lock as the definitive mechanical security solution for high-value storage, sensitive areas, controlled access facilities, and applications requiring absolute key accountability.

Parfait double key 6 turn dead lock

What Is the Strategic Purpose of a Double Key Dead Lock?

This Parfait double key 6 turn dead lock addresses security scenarios where the interior environment is not inherently trusted or where uncontrolled egress creates unacceptable risk.

Standard deadlocks with interior thumb-turn levers allow anyone inside the secured space to exit freely—or to admit exterior individuals without key authorization. This lock eliminates this vulnerability entirely. Both sides require a properly cut and authorized key to achieve any bolt movement.

This configuration is essential for secure storage rooms containing valuable inventory, evidence, or sensitive records. It is required for medication and controlled substance cabinets requiring dual-control access protocols.

Parfait double key 6 turn dead lock is critical in youth facilities and behavioral health environments where interior occupant egress requires supervision. It is used for high-security perimeter gates where interior unauthorized exit creates equal liability to unauthorized entry.

Parfait double key 6 turn dead lock is specified for armories and tool cages where tool accountability requires key-checkout procedures on both sides. It is deployed in international border and customs facilities with compartmentalized security zones.

This Parfait double key 6 turn dead lock transforms a door from a perimeter barrier into a true two-factor controlled access point. No unmonitored passage is permitted in either direction.

How Does the 6-Turn Mechanism Function in a Double-Key Configuration?

This Parfait double key 6 turn dead lock maintains the full six-turn operational sequence regardless of which side the key is inserted. Each key—interior or exterior—must complete six full revolutions to fully extend or retract the 30mm deadbolt.

The internal drive train incorporates a bidirectional cam follower system. It accepts rotational input from either cylinder with identical mechanical advantage and smooth, progressive resistance.

Importantly, this Parfait double key 6 turn dead lock includes an anti-jamming feature. If one  is inserted and partially turned, the opposite cylinder remains free to accept its key and complete the rotation sequence. This prevents lockout situations caused by partially operated bolts.

The deliberate, extended winding sequence is identical on both sides. No shortcuts, no rapid egress, no bypass.

What Are the Critical Material and Construction Specifications?

This   is manufactured to the same exacting specifications as the ABK-6 platform, with modifications for dual-cylinder accommodation.

The deadbolt is precision-ground from 4140 chromoly steel, through-hardened to 52-56 HRC case hardness with a tough, impact-resistant core. It projects a full 30mm from the lock case, engaging a reinforced strike box with a 2mm hardened steel liner.

The   case is die-cast from Zamak 5 zinc alloy. It contains elevated copper and magnesium content for maximum tensile strength and impact resistance.

Both cylinders are 6-pin tumbler configurations featuring serrated and mushroom driver pins. These are specifically selected to defeat picking, raking, and impressioning attacks.

Each cylinder incorporates dual hardened steel rotating discs and stationary anti-drill pins. These are positioned to shatter or deflect rotary drill bit intrusion attempts.

Is the Parfait Double Key Configuration Available in Different Finishes?

Yes. This  is offered in a refined selection of architectural finishes suitable for both high-security industrial applications and period-sensitive heritage installations.

The Satin Stainless Steel finish features a Type 304 stainless steel cover plate with uniform brushed grain. It provides maximum corrosion resistance for coastal, medical, and food processing environments.

The Matte Black finish utilizes a multi-stage zinc phosphate base with thermoset polyester powder topcoat. It is cured at high temperature for exceptional abrasion and chip resistance.

The Polished Brass and Oil-Rubbed Bronze finishes are available for decorative applications. Each is protected by a clear baked epoxy topcoat rated for 500+ hours ASTM B117 salt spray exposure.

All finishes are formulated with UV-stable pigments to resist fading and color shift during prolonged interior or sheltered exterior exposure.

What Are the Unique Installation Requirements for Double-Key Operation?

This Parfait double key 6 turn dead lock requires specific door dimensional criteria to accommodate dual cylinder installation. A cylinder must be installed on both faces of the door. The total door thickness directly determines whether sufficient threads exist for secure cylinder retention.

This lock requires a minimum door thickness of 45mm and a maximum of 65mm. Doors thinner than 45mm will not provide adequate thread engagement for the exterior cylinder retaining screw. This compromises physical security and may allow cylinder extraction.

Additionally, this lock requires a door stile width of at least 130mm to accommodate the larger dual-cylinder lock case footprint.

A precision-drilled 25mm cylinder through-bore is required, positioned at the specified backset of 50mm or 60mm.

Professional locksmith installation is strongly recommended. Improper cylinder alignment will result in binding, difficult operation, or complete lock failure.

What Key Control and Master Keying Options Are Available?

This Parfait double key 6 turn dead lock  accepts industry-standard 6-pin rim cylinders. It is compatible with most professional locksmith key systems.

Each Parfait double key 6 turn dead lock ships standard with six precision-milled nickel silver keys. Three are for exterior operation and three for interior operation. They are cut to identical, randomized bitting patterns.

For multi-lock installations, this lock can be factory-ordered keyed-alike, keyed-different, or master keyed.

Parfait double key 6 turn dead lock is also available in Small Format Interchangeable Core configuration. This allows instant rekeying without cylinder removal. This is particularly valuable for facilities with high staff turnover or compromised key security.

Consult authorized Parfait distributors for custom keying schedules and construction keying requirements prior to order.

What Security Certifications Does the Parfait Double Key Carry?

This Parfait double key 6 turn dead lock has undergone extensive independent testing and exceeds ANSI/BHMA A156.5 Grade 1 requirements for auxiliary deadlocks.

Specific validated performance metrics include cylinder attack resistance, successfully defeating 5-minute drill attack attempts using HSS and carbide bits under 3/16 inch.

Bolt shear strength withstood 1,350 lbs static load applied between door and frame. Impact resistance allowed the lock case to survive a 10-foot-pound drop impact without functional impairment.

Cycle testing confirmed 150,000 consecutive lock and unlock operations without measurable wear or failure. Corrosion resistance achieved 500+ hours ASTM B117 salt spray exposure on premium finishes.

This lock is UL Listed under Standard 437 for key locks. It is compliant with FDA regulations for institutional security hardware in controlled substance storage applications when specified with appropriate key control protocols.

What Are the Typical Applications for This Lock?

This Parfait double key 6 turn dead lock  is not a general-purpose residential lockset. It is a specialized security appliance specified by security professionals for specific threat models and access control requirements.

Typical installations include pharmacy and dispensary controlled substance storage rooms. They include university research laboratories containing hazardous materials or sensitive research.

They include evidence lockers and forensic examination rooms in law enforcement facilities. They include high-value retail stock rooms during non-operating hours.

They include international border inspection areas with compartmentalized security zones. They include private collections, wine cellars, and armories within residential estates.

They include industrial tool cages and consumables storage with formal check-in and check-out protocols.

For standard residential perimeter doors requiring interior egress capability, the ABK-3 turn rim lock or standard single-cylinder deadbolt remains the appropriate specification.

This lock is purpose-engineered for environments where security requirements supersede egress convenience.

Parfait double key 6 turn dead lock available in Mombasa, Kwale, Kilifi, Lamu, Mandera, Marsabit, Isiolo, Meru, Embu, Kitui, Machakos, Makueni, Nyandarua,

Nyeri, Kirinyaga, Murang’a, Kiambu, Turkana, Samburu, Trans Nzoia, Uasin, Gishu, Elgeyo Marakwet, Nandi, Baringo,

Laikipia, Nakuru, Narok, Kajiado, Kericho, Bomet, Kakamega, Vihiga, Bungoma, Busia, Siaya, Kisumu, Homa Bay, Migori, Kisii, Nyamira, Nairobi.

In Nairobi you can find them at: Westlands, Dagoretti,  Lang’ata, Starehe, Kamukunji, Embakasi, and Kasarani, Kibera, Mathare,

Eastleigh, Karen, Lavington, Westlands, Parklands, Runda, South C, South, Ngong Road

In Mombasa you can find us at : Nyali, Mwembe Tayari, Majengo, Likoni ,Bamburi, Miritini