St. steel safety hook tethers

Plastimo tethers with automatic closing stainless steel safety hook(s) to prevent accidental opening.
Polyester flexible tethers with retro-reflective thread to optimize visibility at night.
Flat, elastic or double – 23 mm width – version.
ISO12401 certified.
Strain indicator. 
Supplied in a mesh bag.

  • HARNAIS_ISO_12401
  • made_by_plastimo_bleu


Ref. Type of tethers Number of hooks Length Weight
66834 flat 1 1,5 m 215g
66838 flat 2 1,5 m 345g
66836 elastic 1 1 m extends to 1.5 m 225g
66840 elastic 2 1 m extends to 1.5 m 355g
66865 double tether, RORC-OSR 2018 compliant 3 1 m flat line + 1 m elastic line extends to 1.5 m 550g


Stainless steel safety hook. Double safety.
Opening: 14,5 mm.
Weight: 154g.

Double tethers: RORC-RSO 2018 compliant.

Retro-reflective thread to optimize visibility at night.

Meets RORC-OSR specifications
When the tether is submitted to heavy load (ex. man over board), the strain indicator exposes a label indicating that tether should be replaced.

Official documents

  • EU Certificate_Tethers for harness and lifejackets EU Certificate_Tethers for harness and lifejackets Download
  • EU Compliance Statement_Tethers for harness and lifejackets EU Compliance Statement_Tethers for harness and lifejackets Download

Plastimo tips & tricks

A tether is the indispensable accessory which makes an inflatable lifejacket a fully featured safety equipment. Provided of course, that you have originally selected a lifejacket with integrated harness : the only version providing the adequate resistance and featuring a stainless steel triangle to secure the tether.

When using a harness in conjunction with a tether, it is essential to check that both the harness and the tether are designed to the same standard, and specifically to the same breaking strain level.
The breaking strain is defined by the original standard, but also by the age of the harness or tether : the ageing and general condition of the webbing impacts negatively its level of performance.

Essential features

• Number of lines : a double tether has 2 lines or strands. It enables you to remain clipped as you move about the deck.

• Number of hooks : there is not systematically a hook at both ends ; the tether can be attached to the harness via a webbing loop.

• Length of lines : standard length is 2 m. In the case of a double tether, the 2nd line is reduced to 1 m so that you can clip yourself on a shorter length. The very principle of a harness is to prevent a man falling overboard and being dragged ; one must therefore be clipped on a short length, as often as possible.  

• Elasticity : the tether stretches out when needed and contracts when not under tension, which contributes to a greater freedom of movement and improved safety, as it is kept short and tidy to prevent accidental snagging. The elastic tether is the obvious choice for yachtsmen who wear their harness regularly.

You may also be interested in the following product(s)

Tether with 3 premium aluminium safety hooks

One-piece webbing tether. 2 strain indicators. Aluminium safety hooks. RORC-RSO 2018

Tethers with premium aluminium safety hook

2 or 3 aluminium premium safety hooks. Strain indicator. RORC-RSO 2018

Retro-reflective strap jacklines

Ultra-flat polyester webbing, 26 mm wide. Retro-reflective thread optimizes visibility at night. Fixing loops. Breaking strain 2 400 DaN (2 450 kg). Sold by the pair, shackle not included.