Value Collection 643250PS Hex Head Cap Screw M12 X 1.25

Product Description

The VALUE COLLECTION 643250PS is a metric hex head cap screw engineered for precision fastening applications requiring a fine-pitch thread. This screw features an M12 x 1.25 mm thread profile with a 25 mm length under the head, manufactured from Grade 8.8 steel with a bright, uncoated finish. Grade 8.8 indicates medium-high strength carbon or alloy steel with a minimum tensile strength of 800 MPa and a proof load stress of 600 MPa. The 19 mm hex drive size accommodates standard metric wrenches and sockets. Fully threaded along its entire shank length, this fastener is suited for applications where maximum thread engagement is required. It conforms to DIN 961 and ISO 8676 standards. Machinists, millwrights, maintenance technicians, and assembly professionals typically work with this fastener class.

This screw is used in metric mechanical assemblies where a fine-pitch thread is specified over a standard coarse-pitch M12 thread. Fine-pitch threads provide increased resistance to loosening under vibration and allow for finer torque adjustment during installation. Typical applications include machine tool components, automotive assemblies, industrial equipment, and precision structural connections. The bright, uncoated surface is appropriate for indoor or controlled-environment use where additional corrosion protection is not required or where a secondary coating will be applied after assembly.

Key Features

• M12 x 1.25 mm fine-pitch thread for increased vibration resistance and precise torque control
• Grade 8.8 steel construction for medium-high tensile strength in demanding mechanical assemblies
• Fully threaded shank maximizes thread engagement length
• 19 mm hex head fits standard metric wrenches and sockets
• Bright, uncoated finish suitable for controlled environments or pre-coating applications
• Conforms to DIN 961 and ISO 8676 international standards

Compatibility

Designed as a standard metric replacement or assembly fastener for applications specifying an M12 x 1.25 mm fine-pitch hex head cap screw per DIN 961 or ISO 8676.

Installation Notes

Installation is performed by machinists, millwrights, or mechanical technicians using a 19 mm metric wrench or socket. Verify that the mating threaded hole or nut matches the M12 x 1.25 mm fine-pitch specification before installation, as this pitch is not interchangeable with the standard M12 x 1.75 mm coarse-pitch thread. Apply appropriate thread lubricant or threadlocker as required by the assembly specification. Refer to the equipment manufacturer torque specification for the fastener grade and application before final tightening.