10.9 Black Oxide Coated Steel HoloKrome

Holo-Krome is a brand of high precision threaded fasteners manufactured in the USA, and are available with metric and UNC & UNF threads conforming to the relevant ISO and ASME/ANSI standards. These high tensile strength fasteners are made from alloy steel and finished with black oxide. Their class 3A threads offer greater clamping force, and the tightly controlled fillets beneath their heads increase their fatigue strength. Holo-Krome fasteners are very similar to the Unbrako brand of fasteners, and are suitable where close tolerances, safety and strength are required. Holo-Krome socket head cap screws are marked with a unique Holo-Code on the head, along with the diameter and pitch of the screw, simplifying identification and traceability for users.

Fastener Material Key
BO-12.9	Black Oxide High Tensile Steel Class 12.9 - A high tensile non-stainless grade with a black oxide finish offering limited corrosion resistance.
BO-10.9	Black Oxide High Tensile Steel Class 10.9 - A high tensile non-stainless grade with a black oxide finish offering limited corrosion resistance.

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HoloKrome Socket Low Head Cap Screws in Black Oxide High Tensile Steel Class 10.9

image chamfer for HoloKrome Socket Low Head Cap Screws

HoloKrome Socket Low Head Cap Screws in Black Oxide High Tensile Steel Class 10.9

Holo-Krome branded socket cap low screws, in alloy steel with a tensile strength of 10.9, and finished with black oxide. Manufactured in the USA, Holo-Krome are high quality screws, similar to Unbrako, with precision 3A threads for greater clamping force. The fillet between the head and the body is closely controlled for maximum fatigue strength. Similar to DIN 7984, socket cap low head screws are designed to be used in applications where the head height needs to be limited. The reduced head height and therefore more shallow socket depth, means that the preload cannot be as high as for standard socket head cap screw (see data sheet).

BO-10.9

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