ISC KH255 Swivel Eye (cap screw)

KH255 Swivel Eye (cap screw)

Name:ISC KH255 Swivel Eye (cap screw)
Category:triple-action twist lock
Locking Type:full-auto
Unlock Style:lift-and-twist
Sleeve Rotation:90° (unlocked) | ~100° (maximum)
Shape:asymmetric D
Nose:claw: snagless
Nose Guard:none
Rivets:domed: recessed
Gate Shield:full
Anti Crossload:swivel eye(s)
Weight:149.2 g
Dimensions:Length: 171.4 mm
Width: 68.4 mm
Depth (basket end): 12.8 mm
Gate Opening: 15.5 mm
Strength Ratings:Major Axis: 25 kN
Other Markings:Laser: 081 I|S|C KH255(ratings) | (ce-logo)0120 EN362:04Tread
Batch Marking Location:spine-exterior-left
Collection Criteria:★ Mechanically Interesting
Summary:early intergrated-swivel carabiner
Description & Commentary:

The ISC KH255 carabiner was one of the first aluminmum alloy carabiners with an integrated swivel eye.

This particular KH255 example uses an allen cap head screw, which started to appear by May 2009 on the ISC website as the Swivel Eye carabiner. Later models of the KH255 use a pan-head connector, appearing on the website by 2012 as the Twister. It is unclear if any cap screw model was called the Twister, or vice versa.

The bowback design and deep spine helps prevent the KH255 from rotating in the hand, making it ergonomic for reguarly clipping and unclipping on the end of a lanyard. A shallow snagless clawlock design creates a relatively clean nose.

The narrow eye is only really suited for a single strange of climbing rope. If used in a traditional DRT tree climbing system (traditional MRS), it would be unsuitable for use with wider attachment knots such as a anchor hitch or clove hitch.