VIBO UNI5931 DIN912 M14x150 12.9

Vibo High-Tensile Socket Head Cap Screws (Box of 25)

Description

This is a box of 25 new old stock socket head cap screws from the Italian manufacturer Vibo. These screws are manufactured to the highest standards, meeting both UNI 5931 and DIN 912 specifications. With a property class of 12.9, they offer maximum tensile strength for critical fastening applications in machinery, automotive, and structural engineering.

Specifications

• Manufacturer: Vibo
• Part Type: Socket Head Cap Screw
• Standard: UNI 5931 / DIN 912
• Thread Size: M14
• Length: 150 mm
• Property Class: 12.9
• Material: High-Tensile Alloy Steel
• Quantity: 25 pieces

Label Info

• Brand: BONTEMPI VIBO SPA
• EAN: 8033688018878
• Lot Number: 085968
• Heat Treatment Code: 120015

Application

Ideal for high-stress and high-load applications such as engine components, machine tools, molds, and heavy equipment assembly where reliable and strong fastening is paramount.

Country of Origin

Made in Italy.

CO2 Impact

Choosing this surplus product prevents the emission of approximately 14.0 kg of CO2 compared to manufacturing a new box. This saving is equivalent to the emissions from driving a car for 70 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the difference between UNI 5931, DIN 912, and the modern ISO 4762 standard?

These are all standards for socket head cap screws. DIN 912 (German) and UNI 5931 (Italian) are older national standards that are dimensionally very similar. ISO 4762 is the current international standard that has largely replaced them. For most practical purposes, screws from these three standards are interchangeable for the same size and grade.

What does the property class “12.9” signify?

The “12.9” rating is a high-strength property class for steel bolts. The “12” indicates a nominal ultimate tensile strength of 1200 MPa (Megapascals), and the “.9” indicates that the bolt will begin to yield at 90% of the ultimate tensile strength (i.e., a yield strength of 1080 MPa). These are among the strongest standard fasteners available, suitable for high-stress applications.

What is the recommended tightening torque for an M14 Grade 12.9 screw?

The recommended tightening torque depends on the lubrication condition of the threads. For a non-lubricated (dry) M14 Grade 12.9 screw, a typical torque value is around 260-290 Newton-meters (Nm). However, always consult the specific engineering guidelines for your application to ensure proper clamp load without exceeding the material’s yield strength.

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Last Update: Friday, March 13, 2026