| Name: | Black Diamond (Unknown Big D) |
| Category: | screw lock |
| Locking Type: | manual |
| Locks: | screw |
| Unlock Style: | gate stopped - snap-ring |
| Sleeve Rotation: | 990° (unlocked) | 1200° (maximum) |
| Shape: | asymmetric D |
| Material: | aluminum |
| Profile: | trapezoid |
| Nose: | notch & pin |
| Nose Guard: | none |
| Rivets: | domed: sharp edged |
| Gate Shield: | none |
| Weight: | 87.6 g |
| Dimensions: | Length: 113.04 mm Width: 72.62 mm Depth (basket end): 11.13 mm Gate Opening: 20.74 mm |
| Strength Ratings: |  29 kN |  10 kN |  10 kN |
| Other Markings: | Forged: BLACK(c-diamond)DIAMOND USA | (ratings) (ce-logo)0082Ⓗ Stamped: 8216 |
| Batch Marking Location: | spine-exterior-left |
| Summary: | robust large asymmetric d |
| Description & Commentary: |