Description
BSW Whitworth1/4″(20 T.P.I.), Coarse Pitch, High Tensile 10.9, Self Colour.Allen/ Hexagon Socket, Countersunk Head, Allen Screw/ Bolt, BS 2470
Fixaballsellsall lengths of 1/4″, 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 countersunkfixing/ fastener
The length of a countersunk fixing/ fastener is always from tip totop.
Socket Countersunk Screwscome as ‘sets’ and ‘bolts’.The, SET, term is used to describe a fastener that is fully threaded. Overa certain length (around 2.5 x the diameter) thelength 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 countersunkbolt in this case) and is shouldered. Some people might simply call themsocket allen bolts,’ in association with the Allen, Hexagonal Key which is used to tighten and loosen the fastener. So, Socket, refers to the hexagon shaped indentation found on the top of the fasteners head.
Measuring a CountersunkSocket Screw/ Bolt’s Length
The length of a countersunk fixing/ fastener is always from tip to the top.
Orders placed before 2pm are dispatchedsame 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, 1/4″ Allen/ Hex Socket, CountersunkScrew/ Bolt lengths available:
FT – Fully Threaded
PT – Partially Threaded
| 1/4″-20×1 1/2″,(FT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
| 1/4″-20×1 3/4″,(PT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
| 1/4″-20×2″,(PT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
| 1/4″-20×2 1/2″,(PT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
| 1/4″-20×2 3/4″,(PT) BSW SOCKET COUNTERSUNK HEAD SCREWS BS 2470 RC39-44 SELF COLOUR |
High Tensile 10.9 Grade.
Available Finish: Plain/ Black/ Self Colour
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Fixaball Specialist Fixings and Fasteners BSW Whitworth,Countersunk Socket Screw/ Bolt Diameters, T.P.I.’s and Allen/ Hex Key Sizes Conforming toBS 2470 |
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Thread Pitch (Threads Per Inch/ T.P.I.) |
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Diameter |
BSW Whitworth |
Allen Hexagon Key |
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20 |
5/32″ |
Self Colour, High Tensile 10.9 Material Properties
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Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
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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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