The state-of-art Gripcoil manufacturing facility is located in Kolkata, West Bengal, India and offers significant cost benefits to end users including strategic business supports worldwide. Gripcoil is committed to highest Quality Standards and employs strict Quality Management Systems in accordance with ISO 9001-2001 accreditation.


Gripcoil Inserts are available in either Standard Free Running or Screw-Lock type for every thread from including UNC/UNF, BSW/BSF, BA/BSP, NPT and ISO Metric Threads from 1.6 mm and above including non-standard inserts (helicoils) for special part requirement.


The Gripcoil manufacturing capability standards confirms to relevant DIN 1840-1, BS 4377, 7753, MIL - 1 8846 and others. Thread Inset Specifications ensures global quality consistency and interchangeability of all parts with other make.

Gripcoil Screw Thread Inserts are generally manufactured from Type 304(18-8) Stainless Steel Wire. However, inserts are available in a range of materials:

  • Stainless Steel Grade 304 (AMS7245/DTD 734A)
  • Special purpose Stainless Steel AISI 304 – Non-magnetic
  • Stainless Steel Grade AISI 316
  • Special purpose materials such as Inconel -750, Phosphar, Bronze and others


Gripcoil unique designed easy-to-use Installation Tools, High Speed Thread Insert helicoil Taps and Gauges are also available in wide range of sizes and variants to suit every requirement. The novel design technology of Gripcoil Self Locking Nuts is the best in the industry and is available in standard and non-standard sizes.

ISO Metric Fine Pitches M4 x 0.5 – M 64 x 4.0
ISO Metric Coarse Pitches M 1.6 – M 48
UNC 2 – 56 to 1 ½”
UNF 2 – 64 to 1 ½”
BSW 1/8” to 1 ½”
BSF ¼” to 1 3/8”
BSP 1/8” to 2”
Including Installation Taps, Tools & Gauges