5/16" Four-Flute Square HTAS ALL4 End Mill

This Canadian-made solid carbide end mill is engineered for machining stainless steel and high-temperature alloys. Its four-flute square-end geometry supports productive profiling, slotting and shoulder milling, while the advanced ALL4 coating provides excellent resistance to heat, abrasion and wear.

Built for High-Temperature Alloys and Stainless Steel

The Series 580 HTAS geometry is designed for demanding ferrous machining applications where heat resistance, cutting-edge strength and dependable tool life are essential. Its short-length construction promotes rigidity, while the square cutting end produces flat-bottom features and precise shoulders.

Product Specifications

• Performance Series: HTAS – High Temp Alloy & Stainless
• Series: 580
• Class: Orange
• Length Designation: S
• Cutting Diameter: 5/16"
• Cutting Diameter Tolerance: +0.0000"/-0.0020"
• Number of Flutes: 4
• Length of Cut: 7/16"
• Overall Length: 2-1/2"
• Shank Diameter: 5/16"
• Shank Diameter Tolerance: +0.0000"/-0.0004"
• Shank Style: Round
• End Style: Square
• End Type: Single End
• Coating: ALL4 (Aluminum Chromium Titanium Nitride)
• Material: Solid Carbide
• Made In: Canada

Typical Applications

• Machining stainless steel
• High-temperature and heat-resistant alloys
• Profiling and peripheral milling
• Slotting and pocketing
• Shoulder and flat-bottom milling

Why Choose Skookum End Mills?

Skookum End Mills are made in Canada from premium micro-grain carbide for consistent performance, dependable accuracy and professional-quality results. Backed by more than 25 years of cutting tool experience, they are built to meet the everyday demands of machinists, fabricators and production shops.