Dormer E651 UNC Spiral Flute Tap & Drill Set

The 7/16 UNC spiral flute tap and drill set delivers reliable threading for applications requiring this intermediate-to-large diameter. Producing a 9.4mm thread diameter with 25mm threading length, this combination tool is well-suited for automotive components, machinery fabrication and structural metalwork where seven-sixteenth inch UNC threads are needed. The integrated design eliminates the traditional workflow of drilling, tool changing, and then tapping separately.

Crafted from high-speed steel with a steam-tempered coating, this tool provides dependable cutting performance across its service life. The 8mm connection diameter fits standard power drill chucks securely, whilst the two-flute spiral configuration ensures efficient swarf removal during operation. Both professional engineers and home workshop enthusiasts will appreciate the time savings and convenience of creating accurate threads without switching equipment.

Features and Benefits:
• Single-pass operation significantly reduces threading time
• Steam-tempered finish retains cutting lubricant effectively
• Two-flute spiral pattern provides reliable chip evacuation
• Cylindrical shank with square drive for power tool use
• Right-hand cutting direction for standard applications
• Suitable for through-hole threading in steel and cast steel

Specifications:
Diameter: 7/16 UNC
Type: Sprial Flute
Shank: Cylindrical shank with Square
Connection diameter - millimeter (DCON MS): 8mm
Threading length - millimeter (THL): 25mm
Thread diameter - millimeter (TD): 9.4mm
Basic standard group (BSG): DORMER DIN
Material code (BMC): High Speed Steel
Thread diameter size (TDZ): 7/16
Thread form (THFT): UNC - Unified Coarse
Flute count (NOF): 2
Hand (Cutting direction): Right
Hole Type: Through Hole
Coating: Steam Tempered
Material Application Priority Usage: P - Steel and cast steel
Package Quantity: 1
Country of origin: Brazil
Sellable Unit Weight: 46g
Alt Part Number (Material ID): 5978377
Brand: Dormer
Package Dimensions: 114 x 18 x 14mm