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Class 12.9 Alloy Steel

Button head socket screws or 'allen bolts', manufactured to ISO 7380 in high tensile 12.9 grade alloy steel with a zinc plated finish for corrosion protection. 

Use for high strength fastening with a visually pleasing appearance.

Full range of hex and nylock nuts along with plain and lock washers also available if required.

Socket button head screw lengths are measured from under the head.