Home / Screws & Bolts / Countersunk Screws / Slotted Countersunk Screws / BA Slotted Countersunk Screws Product Description 4BA x 1/2" Slotted Countersunk Screws (BS 57:1951) - BrassImperial BA Slotted Countersunk Machine Screws feature a flat head and a slotted drive. The slotted drive is the simplest form of screw drive which is designed to be used with a Flat Head Screwdriver, whilst the flat head is designed to lay flush with the base material. Machine Screws are massively versatile as they are available in a wide variety of head styles and drive types. Slotted Countersunk Screws in brass are commonly used in model engineering and electrical products across the UK. BA, or British Association Thread, was first used in 1884 and is slowly being replaced by metric fasteners, however this thread is still used in many industries.These Slotted Countersunk Machine Screws are made from Brass which offers both high tensile strength and high corrosion resistance.For larger quantities or items not listed, please email sales@gwr-fasteners.co.uk and one of our team will provide you with a quotation. Read More Specifications Thread Diameter 4BA (3.6mm) Thread Pitch 0.66mm Length Including The Head 1/2" Head Diameter (Min/Max) 0.242" / 0.252" Head Length 0.065" Slot Width (Min/Max) 0.034" / 0.04" Slot Dept 0.031" Slot Width 0.034" / 0.04" Fully Threaded Yes Manufacturing Standard BS57.1951 Material Brass Finish Natural Product Code BS-CSK-4BA-1/2 Customer reviews No reviews left yet Write A Review Most RecentTop Rated Specification Thread Diameter 4BA (3.6mm) Thread Pitch 0.66mm Length Including The Head 1/2" Head Diameter (Min/Max) 0.242" / 0.252" Head Length 0.065" Slot Width (Min/Max) 0.034" / 0.04" Slot Dept 0.031" Slot Width 0.034" / 0.04" Fully Threaded Yes Manufacturing Standard BS57.1951 Material Brass Finish Natural Product Code BS-CSK-4BA-1/2 Description 4BA x 1/2" Slotted Countersunk Screws (BS 57:1951) - BrassImperial BA Slotted Countersunk Machine Screws feature a flat head and a slotted drive. The slotted drive is the simplest form of screw drive which is designed to be used with a Flat Head Screwdriver, whilst the flat head is designed to lay flush with the base material. Machine Screws are massively versatile as they are available in a wide variety of head styles and drive types. Slotted Countersunk Screws in brass are commonly used in model engineering and electrical products across the UK. BA, or British Association Thread, was first used in 1884 and is slowly being replaced by metric fasteners, however this thread is still used in many industries.These Slotted Countersunk Machine Screws are made from Brass which offers both high tensile strength and high corrosion resistance.For larger quantities or items not listed, please email sales@gwr-fasteners.co.uk and one of our team will provide you with a quotation. Reviews No reviews left yet Write A Review Most RecentTop Rated Delivery & Returns Customer Reviews 4BA x 1/2" Slotted Countersunk Screws (BS 57:1951) - Brass Item in Stock (76 Available) Product Code BS-CSK-4BA-1/2 Need More?Additional stock available in: 3 - 5 Days £0.52 Quantity Range Unit Price Unit Saving 1 - 4 £0.52 No Saving 5 - 9 £0.26 £0.26 10 - 24 £0.18 £0.34 25 - 49 £0.16 £0.36 50 - 99 £0.14 £0.38 100 - 499 £0.12 £0.40 500 - 999 £0.11 £0.42 1000+ £0.09 £0.43 Login to add this product to your wishlist. You Will Earn 0 points which is the equivalent of £0.00