3M heavy duty dead lock

Product Description

A 3-inch heavy duty deadlock is a robust, surface-mounted or mortise locking mechanism. It is designed to provide maximum security for commercial, industrial, and high-security residential doors.

This heavy-duty deadlock features a substantial 3-inch bolt or body. It offers deep engagement into the door frame for superior holding power. Constructed from solid brass, steel, or zinc alloy, this lock is engineered to resist forced entry, drilling, and picking attempts.

The 3-inch size is a common standard for entry doors, strike plates, and door frames. This makes it versatile for a wide range of applications. Available in surface-mounted and mortise configurations, this heavy-duty deadlock offers reliable security for inward and outward-opening doors.

What Are the Key Features of a 3-Inch Heavy Duty Deadlock?

3M heavy duty dead lock

Quality 3-inch heavy duty deadlocks incorporate several important security and durability features.

Solid construction means the lock is crafted from brass, steel, or zinc alloy for exceptional strength and corrosion resistance. Anti-drill protection uses hardened steel pins or plates to protect the cylinder from drilling attacks.

Anti-pick pins use specialised spool or mushroom pins to resist lock picking attempts. Anti-bump technology prevents lock bumping, a common break-in technique.

Anti-snap design uses sacrificial break points to protect against cylinder snapping attacks. A large bolt throw provides deep engagement into the strike plate for secure holding power.

The lock features keyed entry and is operated with keys, typically 3 to 5 keys included. Finish options include polished brass, satin nickel, oil-rubbed bronze, and satin chrome.

What Materials and Finishes Are Available?

The 3-inch heavy duty deadlock is manufactured from various premium materials.

Solid brass offers premium durability, corrosion resistance, a classic appearance, and a living finish that patinas over time. It is best for high-end residential, period restorations, and traditional interiors.

Zinc-plated steel i

3M heavy duty dead lock

best for coastal areas, marine environments, and commercial applications.

What Are the Key Specifications of a 3-Inch Heavy Duty Deadlock?

The backset is typically 1-1/8″ to 1-5/8″, with standard sizes being 2-3/8″ or 2-3/4″. Lock length is 3 inches. Bolt throw is typically 1 inch standard.

Material options include brass, steel, zinc alloy, and stainless steel. Configuration can be single cylinder or double cylinder. Cylinder type is standard pin tumbler or high-security with restricted keyway.

The strike plate is heavy-duty steel with deep screw holes. Keys included are typically 3 to 5. Security rating is Grade 1 or equivalent.

What Is the Difference Between a Deadlock and a Deadbolt?

This is a common distinction to understand.

A deadlock is a lock that uses a springless bolt that can only be retracted by turning the key or thumbturn. It is designed to be locked and unlocked manually.

A deadbolt is a type of deadlock, but the term is often used interchangeably. However, “deadlock” generally refers to a surface-mounted mortise lock, while “deadbolt” often refers to a cylindrical lock that fits into a standard door preparation.

The 3-inch heavy duty deadlock described here is a robust, secure locking solution suitable for both residential and commercial applications.

What Are the Different Types of 3-Inch Heavy Duty Deadlocks?

The 3-inch heavy duty deadlock is available in several configurations.

Single cylinder deadlocks are operated by a key on the exterior side and a thumbturn on the interior side. Double cylinder deadlocks require a key to lock and unlock from both sides. This offers maximum security for doors with glass panels.

Anti-snap deadlocks feature a sacrificial break point designed to snap cleanly under attack, preventing the cylinder from being snapped open. Anti-drill deadlocks incorporate hardened steel pins or plates to resist drilling attacks.

How Do You Install a 3-Inch Heavy Duty Deadlock?

Installation methods vary by lock type.

For mortise deadlocks, first mark the backset on the door edge and face. Second, mortise the door edge for the lock body. Third, drill holes for the cylinder and deadbolt.

Fourth, insert the lock body and secure with screws. Finally, install the cylinder and strike plate.

For surface-mounted rim deadlocks, first mount the lock body to the interior door surface. Second, drill through the door for the cylinder. Third, install the cylinder from the exterior side. Finally, install the strike plate on the door frame.

Always follow the manufacturer’s instructions and use proper safety equipment.

What Is the Difference Between Grade 1 and Grade 2 Deadlocks?

The ANSI and BHMA grading system classifies locks by their durability and security.

Grade 1 offers the highest durability with 500,000+ cycles. It is best for high-traffic commercial, institutional, and high-security residential applications.

Grade 2 offers medium durability with 250,000+ cycles. It is best for light commercial and standard residential applications.

Grade 3 offers standard residential durability. It is best for basic residential and low-security applications.

A 3-inch heavy duty deadlock with Grade 1 certification offers the highest level of security and durability. This makes it suitable for demanding commercial and high-security residential applications.

Double hook lock for sliding doors 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