Hi-Lok collar removal: tools and method
Hi-Shear lists its removal tools by hole fit and collar material. From the Hi-Shear Hi-Lok installation instructions, section K.
Non-interference fit hole
An Allen hex wrench holds the pin while pliers unscrew the collar. Hi-Shear Hi-Lok instructions p.11
Interference fit hole or limited access
HLH128 series hand tools, single sizes or the HLK10 kit. Hi-Shear Hi-Lok instructions p.12
Interference fit hole, aluminum collars
HLC1 collar removal tool on a 3/8 square socket drive and air motor. Hi-Shear recommends initial loosening of -8 and larger collars with the HLH128. Hi-Shear Hi-Lok instructions p.12
Production removal, aluminum collars, non-interference fit hole
HLA6000 straight air driver collar removal assembly, for 5/32, 3/16 and 1/4 collars. Hi-Shear Hi-Lok instructions p.13
Production removal, aluminum collars, interference fit hole
HLA6005 straight air driver collar removal assembly, for 5/32, 3/16 and 1/4 collars. On steel collars, Hi-Shear requires initial loosening with the HLH128 hand tool. Hi-Shear Hi-Lok instructions p.13
What Hi-Shear writes about the pin
- “If not damaged during collar removal, the Hi-Lok pin can be reused.” Hi-Shear Hi-Lok instructions p.11
- “Designed for production use to remove Hi-Lok collars from pins, pistol grip power drivers with cutter-type nosepieces are available. The Hi-Lok pin can be reused.” Hi-Shear Hi-Lok instructions p.13
These are the manufacturer's statements about its fastener. Whether a removed pin goes back into an aircraft is decided by the structural repair manual, not by this page.
The aircraft's structural repair manual and the manufacturer's installation instructions govern.
Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers
Hi-Shear's full wording5 paragraphs
- “In non-interference fit holes, Hi-Loks can be removed with common hand tools in a manner similar to removing a nut from a bolt. Use an Allen hex wrench to prevent the pin from rotating while the collar is being unscrewed with pliers. If not damaged during collar removal, the Hi-Lok pin can be reused.” Hi-Shear Hi-Lok instructions p.11
- “To more easily remove Hi-Lok collars from pins installed in interference fit holes and in limited access areas, the HLH128 series of hand tools are available in individual sizes or in sets as in the HLK10 Hi-Lok/Hi-Tigue Collar Removal Tool Kit. The Hi-Lok pin can be reused.” Hi-Shear Hi-Lok instructions p.12
- “In interference fit holes, ALUMINUM Hi-Lok/Hi-Tigue collars can be removed with an HLC1 Hi-Lok Collar Removal Tool fitted to a 3/8 square socket drive and companion air motor. The tool is pressed firmly over the Hi-Lok Collar and rotated until the tool teeth bite sufficiently into the collar material to grip and unscrew the collar from the pin.” Hi-Shear Hi-Lok instructions p.12
- “Designed for production use to remove Hi-Lok collars from pins, pistol grip power drivers with cutter-type nosepieces are available. The Hi-Lok pin can be reused.” Hi-Shear Hi-Lok instructions p.13
- “NOTE: Initial loosening of the -8 and larger Hi-Lok collars with the HLH128 Removal Tool is recommended.” Hi-Shear Hi-Lok instructions p.12
- HLC1 collar removal tools, photo caption: "From left, -5, -6 and -8 sizes shown. Tools are available for -10 and -12 collar sizes." Hi-Shear Hi-Lok instructions p.13
Related: Which collar is it? Hi-Lok collar identification · Hi-Lok tooling and gauges · Hi-Lok family
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