Buckles & D-Rings
MS-04 Steel Double Slot Buckle, 40 kN
The MS-04 is a steel double slot buckle with a listed breaking strength of 40 kN and a thickness of 2 mm. It is used for load-bearing strap connections on harnesses and heavy-duty webbing equipment.

Key features
- Steel construction
- Listed breaking strength 40 kN
- Thickness 2 mm
- Window and slot layout
Specifications
| Property | Value |
|---|---|
| Type | Double slot buckle |
| Material | Steel |
| Breaking strength | 40 kN |
| Thickness | 2 mm |
Product details
The MS-04 is a steel double slot buckle, 2 mm thick, with a listed breaking strength of 40 kN, the highest figure in the MS series. The product photo shows a frame with a large upper window and a narrower lower slot, with side lugs.
The window and slot arrangement lets a connector or a second strap pass through the large opening while webbing is sewn or threaded through the slot, so the MS-04 can act as a load-bearing junction on full body harnesses, rescue harnesses and heavy-duty straps. Breaking strength figures for buckles depend on how the part is loaded in the test, so buyers should ask for the test configuration behind the 40 kN rating and match it to the way the buckle will be loaded in their product.
Request a drawing for dimensions, and state webbing width and thickness, finish and marking in the RFQ. Test the buckle in the finished product with the intended webbing and threading. Power Honour makes parts like the MS-04 for OEM and private-label customers and can work from a customer drawing to modify it.
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