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Leading UK Manufacturer of BS 4278 Metric Collared Eyebolts.

We specialise in the precision manufacture and supply of high-integrity metric collared eyebolts produced in strict accordance with BS 4278 specifications, engineered for safe overhead lifting, crane rigging, and structural anchoring.

Utilising advanced closed-die drop forging and upset forging processes, we compress and align the material's grain flow along the contours of the component, delivering elite tensile strength, ductility, and fatigue resistance compared to machined or cast alternatives.
Whether for standard industrial lifting equipment, modern machinery assembly, or bespoke engineering projects, we provide a complete, certified manufacturing solution.


collared eyebolts to BS4278 metric diagram drawing

BS4278 Metric Collared Eyebolt Technical Dimensions and Safe Working Load Specifications (To Table 1)
A B D E F G H SWL
Vertical Only
Weight Each
1968 1984
mm mm mm mm mm mm mm Tonnes Tonnes kgs
M8 22 7 15 9 20 18 0.15 --- 0.06
M10 22 7 15 9 20 18 0.25 --- 0.07
M12 22 7 15 9 20 18 0.32 0.40 0.07
M14 29 10 20 12 26 23 0.50 --- 0.15
M16 29 10 20 12 26 23 0.63 0.80 0.16
M18 36 12 24 14 32 28 1.00 --- 0.28
M20 40 14 27 16 36 32 1.25 1.60 0.44
M22 45 15 30 18 40 35 1.60 --- 0.56
M24 52 17 35 21 46 40 2.00 2.50 0.84
M27 58 20 39 23 52 46 2.50 --- 1.14
M30 65 22 44 26 58 51 3.20 4.00 1.66
M33 72 24 48 29 64 56 4.00 --- 2.24
M36 81 27 54 32 72 63 5.00 6.30 3.17
M39 90 30 60 36 80 70 6.30 --- 3.92
M42 90 30 60 36 80 70 7.00 8.00 3.92
M45 101 34 68 40 90 79 8.00 --- 6.00
M48 101 34 68 40 90 79 9.00 10.00 6.00
M52 115 38 76 46 102 89 10.00 12.50 9.00
M56 128 43 86 51 114 100 12.50 16.00 13.00
M64 144 48 96 58 128 112 16.00 20.00 17.50
M70 172 54 108 65 144 126 20.00 --- 31.00
M72 172 54 108 65 144 126 22.00 25.00 31.00
M76 172 54 108 65 144 126 25.00 --- 31.00