Scientific Cutting Tools MS33649-12S Porting Tool 4 Flute

Product Description

The SCIENTIFIC CUTTING TOOLS MS33649-12S is a precision porting tool designed to machine O-ring boss port faces to AS 5202 and MS 33649 standards. It produces a 1.665-inch spotface diameter with a plain pilot and is compatible with 3/4-inch tube OD connections (Tube Dash 12). The tool features 4 straight flutes and a bright, uncoated finish. With an overall length of 3.75 inches and a pilot length of 0.507 inches, this tool delivers accurate face geometry required for leak-free O-ring boss fittings in hydraulic and pneumatic tube assemblies. It is used by machinists, pipefitters, and fluid system technicians working to aerospace and industrial port specifications.

The MS33649-12S is suited for porting operations on hydraulic manifolds, tube fittings, and fluid power components where O-ring boss ports must conform to AS 5202 or MS 33649 standards. The 30-degree seal angle and UNJ thread type make it appropriate for aerospace, defense, and industrial fluid system applications requiring precise port face preparation on tube assemblies with 3/4-inch OD tubing.

Key Features

• Spotface diameter of 1.665 inches meets AS 5202 and MS 33649 port standards
• Compatible with 3/4-inch OD tubing, Tube Dash 12 designation
• 4 straight flutes for consistent chip evacuation and clean face finish
• 30-degree seal angle with UNJ thread type for O-ring boss port geometry
• Plain pilot design with minimum pilot diameter of 0.983 inches and maximum of 1.0885 inches
• Bright finish, no coating, for use in general-purpose and aerospace porting applications

Compatibility

Designed for use on workpieces requiring AS 5202 and MS 33649 compliant O-ring boss ports with 3/4-inch OD tube connections (Tube Dash 12). Fits standard 3/4-inch shank toolholders.

Installation Notes

This tool is installed and operated by machinists or fluid system technicians using a milling machine, drill press, or CNC machining center with a compatible 3/4-inch shank holder. Secure the workpiece firmly and ensure the pilot engages the existing port bore squarely before advancing the cutter to avoid bell-mouthing the spotface. Always follow applicable aerospace or industrial standards for port preparation, and verify port geometry with a go/no-go gauge after machining. Refer to AS 5202 and MS 33649 documentation for dimensional acceptance criteria.