Description
4BA, Cap Head, Socket Screw/ Allen Bolt, High Tensile (12.9), Self Colour
Fixaball sells all lengths of 4BA socket cap screw/ bolts.
The, Socket Cap Screw/ Allen Bolt, term is used to describe a fastenerthat is either fully or partially threaded. A screw is fully threaded and a bolt is partialy threaded. Some engineers may call them screws if the person uses the shorter length range of sizes. The thread stays the same length as the fastener gets longer and the maximum length of thread is equal to 2.5 times the diameter (or thereabouts). Socket, refers to the hexagon shaped indentation found on the top of the fasteners head. Here, you can use a hexagon key (Allen Key) to tighten and loosen the fastener. ‘Cap’ refers to the cylindrical shaped head.
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 size and pack quantity selection from the drop down menus at the top of the page.
4BA Allen Socket Cap Screw/ Bolts lengths available at Fixaball
(Fully Threaded –FT, Partially Threaded –PT)
| Description |
| 4-BAx1/4″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx5/16″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx3/8″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx1/2″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx5/8″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx3/4″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx1″,(FT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx1 1/4″,(PT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx1 1/2″,(PT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx2″,(PT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
| 4-BAx2 1 2″,(PT) SOCKET HEAD CAP SCREW BS 2470 BA SELF COLOUR |
Material
High Tensile 12.9 Grade.
BA. Threads
BA screw threads, named after the British Association for Advancement of Science, were devised in 1884 and standardised in 1903. Screws were described as “2BA”, “4BA” etc., BA threads are specified by British Standard BS 93:1951 “Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A.” They are associated with metric units of measurement.
Important BA Thead Information
|
Screw Numbers |
Diameter of Screw |
Head Across Flats |
Threads per inch |
Pitch |
Diameter |
Tapping Drill Size |
|
4 BA |
0.1420 inch |
0.249 inch |
38.5 tpi |
0.0260 inch |
0.1108 inch |
Number drill 31 |
Image is for illustrative purposes only.
