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Greenfield Threading 313532 7/16"-20 straight flute hand tap, bright uncoated finish, three flutes

Greenfield Threading

Greenfield Threading 313532 7/16"-20 Straight Flute Hand Tap shelving

SKU CH-9J5T-G1PKV

A 7/16"-20 UNF straight-flute hand tap in high-speed steel with three flutes and a semi-bottoming chamfer

  • Right-hand UNF threads for standard fastening
  • High-speed steel construction resists wear during use
  • Three flutes clear chips efficiently while tapping
  • 75 % thread depth matches 9.95 mm drill size
  • Semi-bottoming design reaches near-bottom of blind holes

Precision Thread Cutting

The Greenfield Threading 313532 is a straight flute hand tap designed for creating unified fine threads in metal. It suits mechanics, machinists and hobbyists who need to cut new threads or repair damaged ones in workshop or garage projects.

7/16"-20 UNF Thread Specification

This tap produces a 7/16 inch diameter thread with 20 threads per inch in a unified fine series. The H11 thread limit and class 1B fit define the tolerance, while the 9.95 mm drill size prepares the correct hole for a 75 percent thread engagement.

High-Speed Steel Construction

Made from bright uncoated high-speed steel, the tap offers durability for general-purpose hand threading. The semi-bottoming design with three flutes allows threading close to the bottom of blind holes, and the 1 7/16 inch thread length on a 3 1/8 inch overall body provides reach for deeper holes.

Highlights

  • Right-hand UNF threads for standard fastening
  • High-speed steel construction resists wear during use
  • Three flutes clear chips efficiently while tapping
  • 75 % thread depth matches 9.95 mm drill size
  • Semi-bottoming design reaches near-bottom of blind holes

Specifications

BrandGREENFIELD THREADING

Questions about this item

What does the 7/16"-20 thread size mean when I use this tap in my project?

The tap cuts a 7/16 inch diameter thread with 20 threads per inch in the UNF fine-pitch series, producing a Class 1B fit with an H11 limit for standard right-hand fastening.

How does the straight-flute design affect chip handling and the holes I can thread?

Straight flutes push chips ahead of the tap, so the tool works best in through-holes or blind holes with enough clearance at the bottom for chip evacuation.

What shank and square dimensions do I need in a tap wrench or holder for this 313532 tap?

The tap follows standard industry dimensions for a 7/16" UNF hand tap, so any adjustable tap wrench or fixed handle sized for that nominal diameter will fit the shank and drive square.

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