A311 Aluminium Alloy Double-Latch Hook

The A311 is made from aluminium alloy, opens to 20 mm and carries a 20 kN breaking strength. It is a double latch hook, a design intended so that a single accidental push against structure does not open the gate.

Hooks of this type are found on lanyards, restraint lines and lifeline connections, and on equipment that clips to harness D-rings or anchor fittings. The 20 mm opening is sized for defined attachment points rather than structural members, and aluminium alloy keeps the weight low on the harness.

Overall length, width, weight and finish are not listed, so request the drawing and confirm these, along with the exact latch operation, before sampling. Check whether the 20 kN rating meets the requirement of the standard you are working to, and state the marking you need. Power Honour can produce A311 as an OEM or private-label hook and adapt it to a customer drawing.