Standard DIN 7991. Countersunk Socket Head Screws feature a countersunk head type, which essentially allows them to sit flush. The socket head of these screws, makes them ideal to use alongside Hex Drive Bits or Allen Key and Wrenches in particular.
eBay
T Handle Allen Wrench Set Metric, Thandle Tee Handle Allen Hex Key Set, 2 2.5 3 4 5 6 8 10mm,8 Pcs HeavyDuty Excellent Set
Aliexpress UK
M6 Furniture Connector Bolts & Nuts. Flat head bolts with allen key socket. Choice of nut length either 12mm or 17mm, or bolts only. Bright zinc plated for corrosion resistance. Bolt lengths do not include the head.
eBay
RMWIN-Portable Precise Thread Size Checker Keychain Bolt And Nut Identifier Gauge Size Gauge Precise Bolt Size Finder Keychain
Aliexpress UK
Designed for precision and durability, these bolts are the ultimate solution for seamlessly joining furniture pieces, ensuring stability and longevity. They promise not just secure connections but also a hassle-free assembly experience.
eBay
9PCS Long Arm Allen Key Set Hex Key for Bicycle Repair Tool Set Sizes 15mm to 10mm Ideal for Bicycle Maintenance
Aliexpress UK
2mm M2 A2 STAINLESS COUNTERSUNK CSK SOCKET SCREW ALLEN KEY BOLTS SCREWS DIN 7991.
eBay
Allen Key Sets 9 PCS Hexagon Spanner Colorful Universal Hex Wrench Screwdrivers Six-Lens Ball Keys Hand Tools for Bicycle Repair
Aliexpress UK
M8 ( 8mm ) Black Self Colour 12.9 High Tensile Socket Cap Screws Allen Bolts HT.
eBay
Professional Color Coded Long Hex Key Set,10 Piece Metric Allen Key Set,Easily Access Hard-to-Reach Spots, Includes Storage Case
Aliexpress UK
8mm M8 A2 STAINLESS COUNTERSUNK CSK SOCKET SCREW ALLEN KEY BOLTS SCREWS DIN 7991.
eBay
Bicycle 3 Way Hex Keys Wrench 4/5/6mm Y Shape Allen Key Triangle CR-V Steel Multifunctional Mountain Road Bike Repair Tool
Aliexpress UK
Flanged Button Head Screws. Flanged button head socket screws. Allen key size; 2mm. Allen key size; 2.5mm. Allen key size; 3mm. Allen key size; 4mm. Allen key size; 5mm. Grade 10.9 high tensile steel.
eBay
Hex Key Set Metric SAE Allen Wrenches Set Extra Long Ball & Star End Hex Key Set Metric 1.5-10mm Wrench Kit For Bicycle Repair
Aliexpress UK
M10 Cap Head Screws. M10 socket cap screws. High tensile grade 12.9 steel. Head height; 10mm. Allen key size; 8mm. Bright zinc plated. Screws longer than 40mm are partly threaded.
eBay
Bicycle Hex Key Wrench Set T Handle 2-10mm CRV Steel Allen Key Bike Repair Tool MTB Road Bike Maintenance Kit
Aliexpress UK