The 1870-20-313 from Adams Rite is a Standard Cylinder-Operated Flushbolt with Flat Faceplate in Dark Bronze. The 1870-20-313 series Flushbolt is specifically designed for greater key control specially for the aluminum stile doors that prevents accidental locking of the inactive leaf of paired doors. It uses same basic over-center action mechanism as MS pivoted bolt deadlocks. It is recommended for installation at both top and bottom of inactive door with MS1850S Deadlock in active door for greatest security. The 360 degree turn of key throws or retracts the hex-section bolt and the key can be removed only when bolt is in a positively locked or unlocked position. It may be installed to lock at threshold or at header.
Adams Rite 1870-20-313 Flushbolt Features
- Dark Bronze Anodized Finish: Provides a sleek, modern look while enhancing durability against wear and tear.
- Non-handed Operation: Versatile installation options that allow for easy adaptation to left or right-hand doors.
- Cylinder Backset: 31/32″ ensures compatibility with a wide range of door configurations.
- Steel Case Construction: Made with corrosion-resistant plating, measuring 1″ x 6″ x depth (depth varies by bracket) for long-lasting reliability.
- Faceplate Dimensions: 1″ x 6-7/8″ designed to fit seamlessly within standard door frames.
- Standard Mortise Cylinder Compatibility: Accepts any standard 1-5/32″ mortise cylinder from either or both sides, enhancing security options.
- Hexagonal Bolt Construction: 3/8″ flat to flat stainless steel bolt with 11/16″ throw adds strength to the locking mechanism.
- Adjustable Cylinder Height: Standard height is 12″ with ± 1-1/4″ adjustment for flexible installation.
- Suitable for Strike Installation: 1/2″ diameter hole in metal threshold or header allows for secure locking placement.
Adams Rite 1870-20-313 Detailed Specifications
| Finish | Dark Bronze Anodized |
| Operation | Non-handed |
| Cylinder Backset | 31/32″ |
| Case Material | Steel with Corrosion-resistant Plating |
| Faceplate Dimensions | 1″ x 6-7/8″ |
| Morse Cylinder Compatibility | 1-5/32″ Mortise Cylinder |
| Hexagonal Bolt Size | 3/8″ Flat to Flat |
| Throw Length | 11/16″ |
| Cylinder Height Adjustment | 12″ ± 1-1/4″ |
| Strike Installation | 1/2″ Diameter Hole |



















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