Key Features

• John Deere Cylindrical Head Screw, M8 x 25 (Part 19M8439) — externally threaded tension fastener with a cylindrical head for tool engagement.
• Allow tightening or release by turning the head, enabling reliable clamping in assemblies through holes.
• Versatile threading options: mates with a tapped or preformed internal thread, or forms its own mating thread in compatible materials.
• Designed for through-hole alignment in mechanical assemblies where a compact head and strong axial retention are required.

Product Details

• Part number: 19M8439
• Size: M8 x 25 (thread diameter 8 mm, length 25 mm)
• Head type: Cylindrical head
• Thread type: External thread
• Function: Tension fastener for assembly and maintenance tasks; designed for straightforward tightening and release.

Compatibility

• Suitable for through-holes in mating parts during assembly.
• Compatible with both tapped/internal threads and self-forming thread applications in appropriate materials.
• Applicable to agricultural equipment maintenance and farm machinery scenarios where John Deere fasteners are specified.