GY-Round Die

Precision-engineered for threading excellence, our Round Dies are designed to meet the rigorous demands of industrial machining and maintenance. Whether you require a permanent solid fit or the adjustability of a split die, these tools provide clean, accurate threads across a wide variety of materials.

Key Features

  • Versatile Design: These dies are available in both Solid and Split configurations to suit various threading applications
  • High-Grade Material: Manufactured from Special Tool Steel to ensure durability and precision during operation.
  • Industrial Hardness: Heat-treated to a hardness rating of 58° to 60° HRC for superior wear resistance.
  • Extensive Thread Compatibility: Designed to cut threads for multiple standards, including MM, BSW, BSF, UNF, UNC, and BSP.
  • Screwing Size Range: Available in a wide variety of dimensions, ranging from 2x.4 MM (1/16″) up to 50×5.0 MM (2″).
  • Standardized Fitting: Produced in multiple outside diameters (A) from 13/16″ to 4″ and thicknesses (B) from 1/4″ to 1″ to fit standard die stocks.

Technical Specifications

We offer a diverse range of configurations to meet specific threading requirements:
Screwing Size MM Screwing Size Inches Threads Per Inch A Outside Diameter Inches B Thickness Inches
BSW BSF UNF UNC BSP
2x.4 1/16 60 —- —- —- —- 13/16 1/4
2.5x.45 3/32 48 —- —- —- —- 13/16 1/4
3x.5 1/8 40 —- —- —- —- 13/16 1/4
4x.7 5/32 32 —- —- —- —- 13/16 1/4
5x.8 3/16 24 32 —- —- —- 13/16 1/4
6×1.0 7/32 24 28 —- —- —- 13/16 1/4
—- 1/4 20 26 28 20 —- 13/16, 1, 1-5/16 1/4, 3/8, 7/16
7×1.0 9/32 20 26 —- —- 1/8×28 1, 1-5/16 3/8, 7/16
8×1.25 5/16 18 22 24 18 —- 1, 1-5/16 3/8, 7/16
10×1.5 3/8 16 20 24 16 —- 1, 1-5/16, 1-1/2 3/8, 7/16, 1/2
11×1.5 7/16 14 18 20 14 —- 1-5/16, 1-1/2 7/16, 1/2
12×1.75 1/2 12 16 20 13 —- 1-5/16, 1-1/2, 2 7/16, 1/2, 5/8
14×2.0 9/16 12 16 18 12 1/4×19 1-1/2, 2, 2-1/4 1/2, 5/8, 11/16
16×2.0 5/8 11 14 18 11 3/8×19 1-1/2, 2, 2-1/4 1/2, 5/8, 11/16
—- 11/16 11 14 18 —- —- 1-1/2, 2, 2-1/4 1/2, 5/8, 11/16
18×2.5 3/4 10 12 16 10 —- 1-1/2, 2, 2-1/4 1/2, 5/8, 11/16
20×2.5 13/16 10 12 16 —- 1/2×14 2, 2-1/4 5/8, 11/16
22×2.5 7/8 9 11 14 9 5/8×14 2, 2-1/4 5/8, 11/16
24×3.0 1 8 10 12 8 3/4×14 2, 2-1/4, 3 5/8, 11/16, 7/8
27×3.0 1-1/8 7 9 12 7 1×11 2-3/4, 3 11/16, 7/8
30×3.5 1-1/4 7 9 12 7 1-1/4×11 3, 4 7/8, 1
33×3.5 1-3/8 6 8 12 6 1-1/2×11 3, 4 7/8, 1
36×4.0 1-1/2 6 8 12 6 —- 3, 4 7/8, 1
39×4.0 1-5/8 5 8 —- —- —- 3, 4 7/8, 1
42×4.5 1-3/4 5 7 —- 5 2×11 4 1
45×4.5 1-7/8 4.5 7 —- —- —- 4 1
50×5.0 2 4.5 7 —- 4.5 —- 4 1
Pipe Threads (BSP, NPT, BSPT, BSPF) 1/8″ to 1 – 1/2″ 6 to 10 Sizes

Customization & Support

  • Bespoke Sets: Special sizes of complete sets can be supplied against specific orders to match your unique technical requirements.
  • Flexible Packaging: We can supply different sizes and styles of boxes based on customer preferences.
Whether you are performing maintenance, automotive repair, or industrial manufacturing, these tap and die sets provide the accuracy and reliability needed for clean, professional threads every time.