Upgrade or repair a commercial storefront opening with the Adams Rite MS1853A-350 MS® Maximum Security Hookbolt Deadlock Body.

Designed for narrow-stile aluminum doors using the industry-standard Adams Rite MS® preparation, this heavy-duty deadlock features a pivoting hookbolt that securely engages the jamb or strike to resist prying, spreading, and attempts to separate the door from the frame.

This configuration features a 1-1/8" backset and is supplied as the lock body only, making it an excellent replacement when the existing faceplate, cylinder, strike, and trim can be reused or selected separately.

Key Features

• Genuine Adams Rite MS® Maximum Security design

• Part Number: MS1853A-350

• Heavy-duty hookbolt deadlock

• 1-1/8" backset

• Designed for narrow-stile commercial doors

• Pivoting laminated hookbolt

• 13/16" bolt throw

• Helps resist prying and door-spreading attacks

• Designed around the standard Adams Rite MS Prep

• Non-handed

• Steel lock case with corrosion-resistant plating

• Accepts compatible standard mortise cylinders with Adams Rite MS® cam

• Cylinder can be operated from either or both sides when properly configured

• Ideal for commercial storefront repair and replacement

• Lock body only

Maximum Security Hookbolt

Unlike a conventional straight deadbolt, the MS® hookbolt pivots into the strike when the lock is engaged.

The hook-shaped bolt helps resist attempts to:

• Pry the door away from the jamb

• Spread the door and frame apart

• Force the locking point open

• Lift compatible sliding doors from their track

The laminated stainless-steel bolt is designed for demanding commercial security applications.

1-1/8" Backset

This MS1853A configuration features a:

Backset: 1-1/8"

Backset is measured from the edge of the door to the centerline of the cylinder.

Always verify the existing door preparation before ordering, as Adams Rite MS® deadlocks have been manufactured in multiple backset configurations.

Hookbolt Specifications

Bolt Type: Pivoting Hookbolt
Bolt Size: Approximately 5/8" × 1-3/8"
Bolt Throw: 13/16"
Construction: Laminated Stainless Steel
Operation: Key or Thumbturn Operated

The over-center locking action helps keep the bolt securely positioned when locked.

Cylinder Requirements

The lock accepts a compatible standard mortise cylinder measuring approximately:

• 1" cylinder length

• 1-5/32" cylinder diameter

• Adams Rite MS® cam

Compatible mortise cylinders and thumbturns are sold separately.

Cylinder is not included.

Lock Body Only

This listing is for the deadlock body only.

Not Included

• Faceplate

• Mortise cylinder

• Thumbturn

• Strike

• Cylinder escutcheon

• Door trim

• Mounting accessories not specifically stated

This body-only configuration is especially useful when replacing an existing MS® deadlock while retaining compatible existing hardware.

Common Applications

• Aluminum storefront doors

• Narrow-stile doors

• Commercial glass entrances

• Retail storefronts

• Shopping centers

• Office buildings

• Banks

• Commercial entry doors

• Sliding commercial doors

• Institutional facilities

• Storefront door repair

Product Specifications

Brand: Adams Rite
Series: MS® Maximum Security
Part Number: MS1853A-350
Product Type: Hookbolt Deadlock Body
Bolt Type: Pivoting Hookbolt
Backset: 1-1/8"
Bolt Throw: 13/16"
Case Size: Approximately 1" × 6"
Handing: Non-Handed
Door Preparation: Adams Rite MS® Prep
Cylinder Type: Standard Mortise Cylinder with MS® Cam
Cylinder Included: No
Faceplate Included: No
Strike Included: No
Configuration: Lock Body Only
Application: Narrow-Stile Commercial Doors

Important Ordering Information

Before ordering, verify:

• 1-1/8" backset

• Existing Adams Rite MS® preparation

• Hookbolt versus straight-bolt requirement

• Required faceplate

• Required architectural finish

• Strike configuration

• Mortise cylinder and MS® cam

• Door and jamb clearance

Hookbolt installations require the proper strike and door/jamb geometry to allow the bolt to fully engage.