| Name: | BONAITI (D screwlock) |
| Category: | screw lock |
| Locking Type: | manual |
| Locks: | screw |
| Unlock Style: | nose stopped - rotational interferance |
| Sleeve Rotation: | 810° (unlocked) | 1057.5° (maximum) |
| Shape: | D |
| Material: | aluminum |
| Profile: | round |
| Nose: | notch & pin |
| Nose Guard: | none |
| Rivets: | flat disk |
| Gate Shield: | none |
| Weight: | 67 g |
| Dimensions: | Length: 110.2 mm Width: 52.7 mm Rope Bearing Depth: 10.8 mm Gate Opening: 15 mm |
| Strength Ratings: |  2500 KG |
| Other Markings: | Stamped: BONAITI ITALY | (ratings) |
| Summary: | early screwlocker with unique nose-stop mechanism |
| Description & Commentary: |