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HeliCoil Inserts provide positive means for protecting and strengthening all tapped threads. They are mirror-smooth, reinforced internal threads of cold rolled 18-8 stainless steel, or other space age material, with hardness far in excess of the usual tapped materials. The outstanding engineering features of HeliCoil Inserts, long recognised by the leading aircraft, industrial and military equipment manufacturers, have established their widespread use in these fields. The many company standards and defence specifications for HeliCoil Inserts also prove their wide acceptance.
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http://www.armstronghelicoil.co.uk
