M10 x 40mm Hex Head Bolts | 10-Pack, Grade 8.8, Partial Thread (DIN 931)

Tackle heavy-duty fastening with this 10-Pack of M10 x 40mm Hex Head Bolts. Manufactured to the exacting DIN 931 standard from high-tensile Grade 8.8 steel, these robust bolts feature a 26mm unthreaded shoulder ('b') for superior shear strength, followed by a coarse 1.5mm pitch thread. This design is engineered for structural connections, heavy machinery, and applications where the bolt shank must carry significant load through an unthreaded hole.

Key Features:

• Grade 8.8 High Tensile Strength: 800 N/mm² rating ensures reliability under high stress and load.

• Engineered Shoulder Design (DIN 931): 26mm unthreaded shank provides maximum shear resistance and precise component alignment.

• Heavy-Duty M10 Size: 10mm diameter offers substantial clamping force for critical connections.

• Hexagon Head (17mm AF): Large head for secure tightening with a spanner or socket, providing a wide bearing surface.

• Project-Ready 10-Pack: Consistent, high-quality fasteners for professional or serious DIY use.

Specifications:

• Part No.: 4990169

• Standard: DIN 931 / ISO 4014

• Size: M10 x 40mm

• Thread Pitch: 1.5mm

• Head: Hexagon, 17mm AF (S), 6.4mm height

• Shoulder Length (b): 26mm (unthreaded shank)

• Material/Strength: Steel, Grade 8.8

• Thread: Partial (with shoulder)

• Pack Quantity: 10

Ideal For: Structural steelwork, heavy machinery assembly, trailer chassis construction, engine mounts, and any application demanding a high-strength bolt with a load-bearing shoulder.