Holo-krome 04100 Spiral Vent Pull Out Dowel Pin 3/4x4 in

Product Description

The HOLO-KROME 04100 is a spiral vent pull out dowel pin designed for precision alignment and controlled press-fit assembly in industrial and mechanical applications. Manufactured from Grade 4000 alloy steel with a black luster finish, this pin measures 3/4 inch in diameter and 4 inches in overall length. The threaded end allows for pull-out removal using a standard extractor, making it suitable for applications where the pin must be retrieved from a blind hole. Surface hardness is Rockwell C60-64 and core hardness is Rockwell C50-58, providing the strength and wear resistance required in high-load fastening scenarios. The spiral vent groove relieves hydraulic pressure during installation.

This dowel pin is used in machine assembly, tooling fixtures, die sets, and structural alignment where repeatable positioning is critical. The threaded pull-out end makes it especially practical in blind-hole configurations found in manufacturing equipment, press tooling, and heavy mechanical assemblies. Installation and removal are handled by machinists, toolmakers, and mechanical maintenance technicians. The pin conforms to MIL-S-7742, making it appropriate for defense-related and industrial-grade fastening specifications.

Key Features

• Spiral vent groove relieves hydraulic pressure during press-fit installation
• Threaded end design allows pull-out removal from blind holes
• Grade 4000 alloy steel construction for high-strength, high-wear applications
• Surface hardness Rockwell C60-64 with core hardness Rockwell C50-58
• Black luster finish for corrosion resistance and surface protection
• Conforms to MIL-S-7742 fastener standard

Compatibility

Designed as a standard MIL-S-7742 compliant spiral vent pull out dowel pin for use in precision alignment and press-fit assembly applications requiring a 3/4 inch diameter, 4 inch length pin with threaded pull-out capability.

Installation Notes

Installation is typically performed by machinists or mechanical technicians using a press or mallet with appropriate tooling. Always ensure the receiving hole is reamed to the correct tolerance before driving the pin to avoid galling or bore damage. For pull-out removal, use a compatible threaded extractor engaged fully into the threaded end before applying extraction force. De-energize and lock out all equipment before servicing any assembly that includes dowel pins.