Grey Bar

Cup Square Bolts

Cup Head Square Necked Bolts are available to BS.4933 and are normally threaded to the square. Head styles such as Countersunk Cup Nibbed, etc., can also be supplied. The Bolts can be supplied either with or without Hexagon Nuts. Please refer to the "Silo Bolts".

Cup Square Bolts Materials & Finishes

Cup Square bolts are available in standard Mild Steels or Carbon Steels with Boron suitably heat treated for higher tensile requirements. Various finishes can be added from the standard self colour, examples being zinc plate and colour passivations, galvanised, etc.

Applications

Used in a wide variety of industries for fixing steel and wood fabrications.

Stock Sizes

M5 to M16 Dimensions as well as their imperial equivalents.

Design Specification

For more detailed product specifications.

DIMENSIONS TO BS.4933 ALL BOLTS ARE SUPPLIED THREADED TO HEAD
Dimension

Thread Size Pitch

M5 M6 M8 M10 M12 M16
0.80 1.00 1.25 1.50 1.75 2.00

Head Diameter

Min           Max 10.20 11.30 12.40 13.50 16.90 18.00 21.20 22.50 25.70 27.00 34.40 36.00

Head Depth

 Min           Max 2.50 3.10 3.00 3.60 4.00 4.80 5.00 5.80 6.00 6.80 8.00 8.90

Square A/F

 Min           Max 4.52 5.48 5.52 6.48 7.42 8.58 9.42 10.58 11.30 12.70 15.30 16.70

Square Depth

 Min           Max 2.50 3.10 3.00 3.60 4.00 4.75 5.00 5.75 6.00 6.75 8.00 8.90

Specials

Our manufacturing plant is capable of producing cup square bolts to your drawings, in non standard lengths, as well as to other National or European Standards and stocking them for your call off instructions.

Packing

The Cup Square Bolts are packed into polypropylene bags ready for immediate dispatch.