RUKO HGB-DIN352-HSS-60°-5/16 maschio a mano, UNC 5/16-18, HSS, DIN 352, plug tap

This RUKO hand tap is built for cutting Unified National Coarse (UNC) threads with a 5/16-inch nominal diameter and 18 threads per inch. Unlike taps with a tapered lead, this plug tap has a shorter chamfer, making it suitable for threading closer to the bottom of blind holes. It is made from high-speed steel (HSS) and follows DIN 352, so it fits standard tap wrenches and works in unalloyed and low-alloyed steels, cast iron, and non-ferrous metals.

Highlights

• Thread standard: UNC 5/16-18
• Material: High-speed steel (HSS)
• Plug tap (No. 2) with straight flutes
• Right-hand cutting direction
• Square drive shank

In daily use

The four straight flutes clear chips efficiently, while the 60° thread angle matches standard UNC nuts and bolts. The bright, uncoated finish reduces friction in softer materials and keeps the tap easy to inspect. The square drive shank locks securely into a tap wrench or machine holder.

Full specifications

• Product type: Hand tap
• Thread type: UNC
• Nominal diameter: 5/16 inch
• Threads per inch: 18
• Thread pitch: 1.411 mm
• Thread angle: 60°
• Tap type: Plug tap (No. 2)
• Cutting direction: Right-hand
• Flute type: Straight
• Number of flutes: 4
• Shank type: Square drive
• Tolerance class: 2B
• Overall length: 63 mm
• Thread length: 22 mm
• Shank diameter: 6.0 mm
• Square drive size: 4.9 mm
• Surface treatment: Bright (uncoated)
• Standard: DIN 352
• Application: General purpose threading

Final note

For a reliable UNC 5/16-18 thread in everyday workshop materials, this HSS plug tap offers a straightforward, DIN-compliant solution.