https://www.w3.org/TR/2007/WD-WCAG20-TECHS-20071211/H42.html
H42: Using h1-h6 to identify headings | Techniques for WCAG 2.0
https://www.w3.org/WAI/GL/2010/WD-WCAG20-TECHS-20100708/H42.html
H42: Using h1-h6 to identify headings | Techniques for WCAG 2.0
https://www.husqvarna.com/us/chains/h42-chisel-3-8-1-5-mm/
Chainsaw Chain H42 3/8" 1,5 mm | Husqvarna US
A high-performance, low-vibration chain with square-corner "chisel" cutters for high-production cutting of clean wood. Round ground cutters an standard sequence
chainsaw chain3 81 5h42mm
https://www.husqvarna.com/in/chains/h42-chisel-3-8-1-5-mm/?article=501841484
Husqvarna H42 Chisel 3/8" 1,5 mm Chain | Husqvarna IN
A high-performance, low-vibration chain with "chisel" cutters for high-production cutting of clean wood.
3 81 5husqvarnah42chisel
https://www.w3.org/WAI/GL/2014/WD-WCAG20-TECHS-20140107/H42.html
H42: Using h1-h6 to identify headings | Techniques for WCAG 2.0