The DMM 12mm Steel Boa HMS Screwgate is a heavy-duty HMS locking carabiner designed for demanding climbing, rope access, and technical applications. Its robust steel construction provides a high 40kN major-axis minimum breaking strength, making it suitable for situations where exceptional connector strength is required.
With a large HMS profile and a 24mm gate opening, the DMM 12mm Steel Boa HMS Screwgate provides generous space for connecting ropes, slings, and compatible equipment. The screwgate locking mechanism offers a straightforward manual locking system for secure connections during technical rope work.
Key Features
- Heavy-duty steel HMS locking carabiner
- Robust construction for demanding technical applications
- High 40kN major-axis MBS
- 10kN minor-axis MBS
- 12kN gate-open MBS
- Large 24mm gate opening
- HMS profile provides generous space for rope and equipment handling
- Screwgate locking mechanism for manual securing
- Suitable for climbing and rope-access applications
- Weight: 262g
Heavy-Duty Steel Construction
The DMM 12mm Steel Boa HMS Screwgate is built for applications where high connector strength is a priority. Its steel construction and 40kN major-axis MBS provide a substantial strength margin for compatible technical systems.
HMS Profile for Rope Handling
The HMS-shaped design provides a spacious basket for rope handling and equipment connections. This makes the carabiner suitable for applications where ropes, slings, and other compatible equipment need to be accommodated within a single connector.
Screwgate Locking System
The manual screwgate mechanism provides a simple method of securing the carabiner once the gate is closed. It is designed for users who require a manually operated locking connector for technical rope systems.
Large Gate Opening
With a 24mm gate opening, the Boa provides ample access for clipping and connecting compatible equipment. The generous opening is particularly useful when working with larger ropes or multiple pieces of equipment.
Technical Specifications
| Specification | Details |
|---|---|
| Dimensions | 76 x 123mm |
| Weight | 262g |
| MBS (Major Axis) | 40kN |
| MBS (Minor Axis) | 10kN |
| MBS (Gate Open) | 12kN |
| Gate Opening | 24mm |
| Certification | EN362:2004 B; EN12275:2013 B/H |
High-Strength HMS Connector
The DMM 12mm Steel Boa HMS Screwgate combines a robust steel construction, large HMS profile, and high 40kN major-axis strength for demanding technical applications. Its large gate opening and manual screwgate design make it a dependable connector for professional climbing and rope equipment.
Choose the DMM 12mm Steel Boa HMS Screwgate from Backpackers Outdoor when high strength and robust construction are essential for your technical rope equipment.

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