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Fixaball sells all lengths of 1/2", BSW Whitworth, countersunk socket screw/ bolts.
Hex/ Allen Socket Countersunk Screw/ Bolts Description
Countersunk fasteners are designed to fit flush on the connecting surface when fully tightened. They are tightened and loosened with an allen/ hex key drive.
How to measure a countersunk fixing/ fastener
The length of a countersunk fixing/ fastener is always from tip to top.
Socket Countersunk Screws come as 'sets' and 'bolts'. The, ‘SET’, term is uséd to describe a fastener that is fully threaded. Over a certain length (around 2.5 x the diameter) the length the fastener will have a, 'shoulder,' or unthreaded area under the head (plain shank). This space of unthreaded area confirms that the fastener is now a bolt (socket countersunk bolt in this case) and is shouldered. Some people might simply call them socket allen bolts,' in association with the Allen, Hexagonal Key which is uséd to tighten and loosen the fastener. So, ‘Socket,’ refers to the hexagon shaped indentation found on the top of the fasteners’ head.
Measuring a Countersunk Socket Screw/ Bolt's Length
The length of a countersunk fixing/ fastener is always from tip to the top.
Orders placed before 2pm are dispatched same day (Mon-Fri).
Standard, Free Delivery is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a faster delivery time, select 1st class or courier at checkout.
Please make your, 'No. of Items in Pack', 'Length', and pack 'Quantity' selection from the drop down menus.
BSW Whitworth, 1/2" Allen/ Hex Socket, Countersunk Screw/ Bolt lengths available:
FT - Fully Threaded
PT - Partially Threaded
1/2"-12x5/8",(FT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
1/2"-12x1",(FT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
1/2"-12x1 1/2",(FT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
1/2"-12x1 3/4",(FT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
1/2"-12x2 1/2",(PT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
High Tensile – 10.9 Grade.
Available Finish: Plain/ Black/ Self Colour
Fixaball – Specialist Fixings and Fasteners BSW Whitworth, Countersunk Socket Screw/ Bolt Diameters, T.P.I.'s and Allen/ Hex Key Sizes Conforming to BS 2470 |
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Thread Pitch (Threads Per Inch/ T.P.I.) |
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Diameter |
BSW Whitworth |
Allen Hexagon Key |
½ |
12 |
5/16" |
Self Colour, High Tensile 10.9 Material Properties
Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
High Tensile Steel (10.9) |
Self-Colour (black) |
Low, without further surface treatment |
· No exposure to moisture · Often Greased/ Oiled |
Image is for illustrative purposes only.
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Accepted Payment Methods
Returns are accepted
Items must be returned within 30 days of the auction ending
Buyer will pay for return shipping.