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Carriage Bolts

Also known as a “Cup Square” bolt, has a domed head. The square section under the head grips into the part being fastened preventing the bolt from turning when the nut is tightened.

DIN 603 Mild Steel Cup Square Bolt

Hex Head Bolts

Hex head bolts, Available in Mild Steel or High Tensile and also in some exotic materials for extra corrosion resistance or strength. These have a hexagonal head and are driven with a wrench. Can be used with or without washers in both timber and steel applications. These bolts are partially threaded.

DIN 601 GR 4.6 - Mild Steel

DIN 931 GR 8.8 - Hi-Tensile

DIN 931 GR 10.9 - Hi-Tensile

DIN 931 GR 5 - Hi-Tensile (UNC)

DIN 931 GR 5 - Hi-Tensile (UNF)

Hex Head Set Screws

Extensively used in most industries including construction, timber, engineering and mining. Available in Mild Steel or High Tensile as well as in different plating types.

DIN 558 GR 4.6 Mild Steel

Hex Head Set Screw

DIN 934 + 558 GR 4.6 Mild Steel XOX (Hex Set and Nut)

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Serrated Flanged Bolts

Serration prevents loosening of the bolts under strenuous conditions. Used in industries including timber and construction.

DIN 6921 Serrated flange bolt

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Countersunk Square Neck Bolts

Also known as Plough Bolts, these bolts are used wherever a countersunk finish is required - primarily in steel and timber applications. 

DIN 605 Mild Steel Countersunk Square Neck Bolt

Countersunk Nib

A Countersunk Nib is a bolt with a nib on one side to prevent the bolt from turning when fastening the nut. 

DIN 604 Mild Steel Countersunk Nib Bolt

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U-Bolt

A U-Bolt has a U shaped shank that is threaded on both ends. This fastener is used for fastening to tubular objects such as poles. 

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BOLT TYPE FASTENERS

Materials

Mild Steel (MS) Grade 4.8

High Tensile (HT) Grade 8.8

High Tensile (HT) Grade 10.9

High Tensile (HT) Grade 12.9

Stainless Steel (SS) A2 - 304

Stainless Steel (SS) A4 - 316

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Plating

Zinc

Yellow Zinc

Black Japan

Hot Dip Galvanised

Threading

Metric

Metric Fine

Metric Extra Fine

Imperial

 

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Diameters

M5 and upwards

 

 

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