| Name: | Black Diamond Big D |
| Category: | screw lock |
| Locking Type: | manual |
| Locks: | screw |
| Unlock Style: | hinge stopped |
| Sleeve Rotation: | 360° (unlocked) | 765° (maximum) |
| Shape: | asymmetric D |
| Material: | aluminum |
| Profile: | flat |
| Nose: | notch & pin |
| Nose Guard: | none |
| Rivets: | mixed |
| Gate Shield: | none |
| Weight: | 71 g |
| Dimensions: | Length: 110.5 mm Width: 66 mm Rope Bearing Depth: 9.6 mm Gate Opening: 21.5 mm |
| Strength Ratings: |  2800 kg |
| Other Markings: | Forged: BLACK (c-diamond logo) DIAMOND-U.S.A. | (ratings) |
| Collection Criteria: | ★ Mechanically Interesting |
| Summary: | threaded sleeve blocks the hinge rather than nose |
| Description & Commentary: |