GY HML HSS Ground Thread Machine Taps

ISO METRIC THREAD, LONG SHANK
Coarse Pitch & Fine Pitch
As per IS:6175 Part 4 & ISO 2283

Optimize your machining processes with our versatile range of high-quality taps, engineered for precision and durability. Designed to meet IS 6175 IV and ISO 2283 standards, these tools offer reliable performance across a variety of material applications.

Available Tap Varieties

  • Straight Flute: Standard design for general applications. (Form A,C and D)
  • Spiral Point: Ideal for through-holes, pushing chips forward. (Form B)
  • Spiral Flute 35°: Designed for blind holes to pull chips upward. (Form C/35° Right Spiral Point)

Tap Application Matrix

Tap Variety STRAIGHT FLUTE (Form A,C and D) SPIRAL POINT (Form B) SPIRAL FLUTE 35°(Form C)
Standard Tap – HSS ✓ ✓ ✓
High Performance Tap – HSS-E ✓ ✓ ✓
Type of Hole: Through Hole ✓ ✓
Type of Hole: Blind Hole ✓ ✓

Key Features

  • Standard Compliance: Produced as per IS: 6175 Part 4 and International specifications for global compatibility.
  • Class of Tolerance:Produced as per 6H. When the screwing tap is desired for class of tolerance other than 6H, class of tolerance 4H or 7H or 7H cut threads as appropriate, shall be mentioned in the designation immediately after the size.
  • Material: Premium Grade High-Speed Steel (HSS) and High-Performance Cobalt HSS (HSS-E) taps. for superior heat resistance and edge retention.
  • Flute Design: Precision-ground straight flutes provide ample space for chip evacuation and lubricant flow.
  • Application: Suitable for alloy steel, carbon steel, cast iron, and non-ferrous materials.
Unless otherwise specified No. 2 – Form D non-serial screwing tap shall be supplied.
Note: For optimal tool life and thread quality, always use appropriate cutting oil and ensure the pre-drilled hole size matches the recommended tap drill chart.
TECHNICAL SPECIFICATION FOR COARSE PITCH
Size Nominal Dia D (mm) Pitch (mm) d n9 (mm) l (mm) l1 (mm) l3 (mm) l4 (mm) L (mm) Square
a h11 (mm) l2 (mm)
M3 3 0.5 2.24 11 4 2 1 66 1.8 4
M3.5 3.5 0.6 2.5 13 4.8 2.4 1.2 68 2 4
M4 4 0.7 3.15 13 5.6 2.8 1.4 73 2.5 5
M4.5 4.5 0.75 3.55 13 5.6 3 1.4 73 2.8 5
M5 5 0.8 4 16 6.4 3.2 1.6 79 3.15 6
M6 6 1 4.5 19 8 4 2 89 3.55 6
M7 7 1 5.6 19 8 4 2 89 4.5 7
M8 8 1.25 6.3 22 10 5 2.5 97 5 8
M9 9 1.25 7.1 22 10 5 2.5 97 5.6 8
M10 10 1.5 8 24 12 6 3 108 6.3 9
M11 11 1.5 8 25 12 6 3 115 6.3 9
M12 12 1.75 9 29 14 7 3.5 119 7.1 10
M14 14 2 11.2 30 16 8 4 127 9 12
M16 16 2 12.5 32 16 8 4 137 10 13
M18 18 2.5 14 37 20 10 5 149 11.2 14
M20 20 2.5 14 37 20 10 5 149 11.2 14
M22 22 2.5 16 38 20 10 5 158 12.5 16
M24 42 3 18 45 24 12 6 172 14 18
TECHNICAL SPECIFICATION FOR FINE PITCH
Size Nominal Dia D (mm) Pitch (mm) d h9 (mm) l (mm) l1 (mm) l3 (mm) l4 (mm) L (mm) Square
a h11 (mm) l2 (mm)
M3 3 0.35 2.24 11 2.8 1.4 0.7 66 1.8 4
M3.5 3.5 0.35 2.5 13 2.8 1.4 0.7 68 2 4
M4 4 0.5 3.15 13 4 2 1 73 2.5 5
M4.5 4.5 0.5 3.55 13 4 2 1 73 2.8 5
M5 5 0.5 4 16 4 2 1 79 3.15 6
M5.5 5.5 0.5 4 17 4 2 1 84 3.15 6
M6 6 0.75 4.5 19 6 3 1.5 89 3.55 7
M7 7 0.75 5.6 19 6 3 1.5 89 4.5 7
M8 8 0.75 6.3 16 8 4 2 91 5 8
M8 8 1 6.3 19 8 4 2 97 5 8
M9 9 0.75 7.1 16 8 4 2 94 5.6 8
M11 11 0.75 8 20 8 4 2 110 6.3 9
M11 11 1 8 20 9 4 2 110 6.3 9
M12 12 1 9 20 8 4 2 110 7.1 10
M12 12 1.25 9 24 8 4 2 119 7.1 10
M12 12 1.5 9 29 12 6 3 119 7.1 10
M14 14 1 11.2 22 8 4 2 124 9 12
M14 14 1.25 11.2 25 8 4 2 127 9 12
M14 14 1.5 11.2 30 12 6 3 127 9 12
M15 15 1 11.2 22 12 6 3 124 9 12
M15 15 1.5 11.2 30 12 6 3 127 9 12
M16 16 1 12.5 22 12 6 3 127 10 13
M16 16 1.5 12.5 32 12 6 3 137 10 13
M17 17 1 12.5 22 12 6 3 127 10 13
M17 17 1.5 12.5 32 12 6 3 137 10 13
M18 18 1 14 22 12 6 3 135 11.2 14
M18 18 1.5 14 29 12 6 3 142 11.2 14
M18 18 2 14 37 16 8 4 149 11.2 14
M20 20 1 14 27 12 6 3 140 11.2 14
M20 20 1.5 14 29 12 6 3 142 11.2 14
M20 20 2 14 37 16 8 4 149 11.2 14
M22 22 1 16 29 12 6 3 149 12.5 16
M22 22 1.5 16 33 12 6 3 153 12.5 16
M22 22 2 16 38 16 8 4 158 12.5 16
M24 24 1.5 18 35 12 6 3 172 14 18
M24 24 2 18 35 16 8 4 172 14 18