Holo-krome 04086 Spiral Vent Pull Out Dowel Pin 5/8x2.5in

Product Description

The HOLO-KROME 04086 is a spiral vent pull out dowel pin used to align and secure mating components in precision assemblies. Measuring 5/8 inch in diameter and 2.5 inches in overall length, this pin is machined from Grade 4000 alloy steel and finished with a black luster coating for corrosion resistance. The threaded end allows controlled extraction without damaging the bore. Surface hardness is Rockwell C60-64, with a core hardness of Rockwell C50-58, providing the toughness needed for demanding fit applications. Machinists, tool and die makers, and maintenance technicians working in industrial or manufacturing environments install this type of pin.

This dowel pin suits applications requiring precise hole-to-hole alignment in jigs, fixtures, dies, and machine assemblies. The spiral vent groove allows trapped air and lubricant to escape during insertion, reducing hydraulic lock and enabling smooth seating. The threaded pull out end is essential in blind-hole installations where press-fit removal would otherwise require destructive force. It is supplied as a single unit, making it practical for repair, replacement, or prototype work where only one pin is needed.

Key Features

• Spiral vent groove prevents hydraulic lock during insertion into blind holes
• Threaded pull out end enables clean extraction from blind-bore applications
• Grade 4000 alloy steel construction for high-strength, wear-resistant service
• Surface hardness of Rockwell C60-64 with core hardness of Rockwell C50-58
• Black luster finish provides a base level of corrosion protection
• Meets ASME/ANSI B18.8.2 and MIL-S-7742 standards for dimensional and performance consistency

Compatibility

Designed as a standard-specification spiral vent pull out dowel pin per ASME/ANSI B18.8.2 and MIL-S-7742, suitable for use in any fixture, die, or machine assembly requiring a 5/8 inch diameter precision alignment pin in a blind-hole configuration.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a press or mallet with an appropriate driver. Ensure the receiving bore is clean, dimensioned to specification, and free of burrs before insertion. Apply a light film of lubricant to the pin shank to aid seating and protect the bore surface. Always use the threaded pull out feature for removal — do not attempt to drive the pin out from the opposite end of a blind hole.