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".
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.
Used in a wide variety of industries for fixing steel and wood fabrications.
M5 to M16 Dimensions as well as their imperial equivalents.
For more detailed product specifications.
Thread Size Pitch
|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|
|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|
|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|
|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|