The MS1851S-250-313 from Adams Rite is a durable deadlock with a hookbolt and 31/32″ backset, designed for maximum security in narrow stile doors. Its high-quality construction features a laminated stainless steel bolt activated by a reliable pivot mechanism, ensuring robust protection even in challenging installations. The lock features a 360-degree key or thumbturn operation, allowing for secure locking and unlocking, with the convenience of a removable key only in the locked or unlocked position. This deadlock is compatible with any standard 1-5/32″ diameter mortise cylinder or thumbturn, providing versatility for various applications.
Adams Rite MS1851S-250-313 Key Features
- Dark Bronze Anodized Finish: Provides a sleek, professional appearance while enhancing corrosion resistance.
- Cylinder Backset: 31/32″ backset ensures compatibility with most narrow stile installations.
- Stainless Steel Case: The corrosion-resistant casing measures 1″ x 6″ x depth, adding durability and longevity.
- Hookbolt Construction: Composed of eight-ply laminated stainless steel, measuring 5/8″ x 1-3/8″ x 2-7/8″ with a 1-3/8″ throw for enhanced security.
- Radius Faceplate: Measures 1″ x 6-7/8″, providing a clean and modern look.
- Handed Operation: Non-handed design allows for easy installation on either left or right-handed doors.
- Cylinder Compatibility: Accepts any standard 1-5/32″ diameter mortise cylinder with MS dimensioned cam for flexible usage.
- Grade 1 Strength: Exceeds the highest standards for durability and security, making it suitable for high-traffic areas.
- Strike Not Included: Allows for customization based on the specific installation requirements.
Adams Rite MS1851S-250-313 Detailed Specifications
| Feature | Detail |
| Finish | Dark Bronze Anodized |
| Cylinder Backset | 31/32″ |
| Case Dimensions | 1″ x 6″ x variable depth |
| Hookbolt Material | Eight-ply laminated stainless steel |
| Hookbolt Dimensions | 5/8″ x 1-3/8″ x 2-7/8″ with 1-3/8″ throw |
| Faceplate Dimensions | 1″ x 6-7/8″ |
| Operation | Non-handed |
| Cylinder Requirement | Standard 1-5/32″ diameter mortise cylinder with MS cam |
| Strength Rating | Grade 1 |
| Strike | Not included |



















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