Holo-krome 04074 Spiral Vent Pull Out Dowel Pin

Product Description

The HOLO-KROME 04074 is a spiral vent pull out dowel pin used for precision alignment and locating applications in machined assemblies. The spiral vent groove allows air and fluid to escape during installation, preventing hydraulic lock in blind holes. Made from Grade 4000 alloy steel with a black luster finish, the pin measures 0.5 inches in diameter and 3.5 inches in overall length. Surface hardness is Rockwell C60-64 and core hardness is Rockwell C50-58, delivering the toughness required for demanding industrial and mechanical alignment tasks. The threaded end allows removal with a standard extraction tool without damage to the bore or surrounding material.

This dowel pin is suited for machine shops, tooling fixtures, jig and die assemblies, and general precision alignment work across manufacturing and maintenance environments. The threaded pull out design is specifically intended for blind hole installations where the pin must be removed without access from the opposite side. Millwrights, machinists, and maintenance technicians typically install this type of fastener in production machinery, presses, and fabrication fixtures. Conforms to MIL-S-7742 fastener standards.

Key Features

• Spiral vent groove prevents hydraulic lock in blind hole installations
• Threaded end allows clean pull out removal from blind holes using an extraction tool
• Grade 4000 alloy steel construction for high strength and wear resistance
• Surface hardness of Rockwell C60-64 and core hardness of Rockwell C50-58
• Black luster finish provides corrosion resistance for industrial environments
• Meets MIL-S-7742 fastener standard for dimensional and material compliance

Compatibility

Designed as an OEM-style precision alignment fastener for blind hole applications in machined components, jigs, fixtures, and tooling assemblies requiring a removable dowel pin.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a press or mallet with appropriate bore alignment. The receiving bore should be cleaned and inspected before installation to ensure proper fit. To remove, thread an extraction tool into the threaded end and pull axially. Never drive out from the opposite end on a blind hole application, as this will damage the bore.