| Image | Summary | ||||
|---|---|---|---|---|---|
 | Black Diamond Airlock Bayonet | S-spine | assisted | lift-and-twist | spring-powered manual locking mechanism |
 | Black Diamond Airlock Screwgate (1997) (flat seat) (red sleeve) | S-spine | manual | nose stopped - longitudinal interferance | early BD tapered sleeve |
 | Black Diamond Airlock Screwgate (1997) (recessed seat) (green sleeve) | S-spine | manual | nose stopped - longitudinal interferance | early BD tapered sleeve |
 | Black Diamond Airlock Screwgate (≤1996) | S-spine | manual | nose stopped | early s-spine HMS |