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1/2" BSP (15mm) BLACK STEEL LOCK NUT FEMALE THREAD LOCKNUT BACKNUT BACK NUT
$3.95
Black steel is made by adding carbon to iron during the smelting process.
This creates iron-carbon alloys that are harder than pure iron but more brittle than other types of steel.
Black steel has a matte finish that does not rust or corrode as easily as regular carbon steel due to its higher carbon content levels.
Revised 17/03/2024