Heli-Coil R1191-4 Free Running Thread Insert, 1/4-28 UNF, 3/8" Length, Stainless Steel, Pack of 12

Heli-Coil R1191-4 Free Running Thread Insert, 1/4-28 UNF, 3/8" Length, Stainless Steel, Pack of 12

• Heli-Coil R1191-4 is a free running stainless steel helical thread insert designed for repairing or reinforcing 1/4-28 UNF internal threads. This insert length is 3/8" and the package contains 12 identical inserts for installing into properly prepared tapped holes.
• Features:
  • Thread size 1/4-28 UNF is designed to restore or reinforce internal threads to accept standard 1/4-28 fasteners.
  • Free running insert style is intended for general thread repair where prevailing torque locking is not required.
  • Stainless steel wire construction provides a specified material option for common repair and maintenance environments.
  • 3/8" insert length supports thread engagement in applications that call for this insert length.
  • System Compatibility or Application: Intended for thread repair or thread reinforcement of 1/4-28 UNF holes using compatible STI tap and installation tooling.
• Specifications:
  • Manufacturer: Heli-Coil
  • Part Number: R1191-4
  • MPN: R1191-4
  • UPC: 025964110091
  • Product Type or Function: Free running helical thread insert
  • Thread Size: 1/4-28 UNF
  • Insert Length: 3/8"
  • Material: Stainless steel
  • Quantity: 12 inserts per package
  • System Compatibility or Application: for thread repair or reinforcement of 1/4-28 UNF internal threads using compatible STI tap and installation tooling
• The Heli-Coil Free Running Thread Insert can also be referred to as a helical thread insert, a thread repair insert, a 1/4-28 thread insert, a stainless steel wire thread insert, and a free running screw thread insert.

Heli-Coil is a brand within the Stanley Engineered Fastening portfolio, supplying wire threaded inserts and related installation tooling for thread reinforcement and thread repair in industrial and maintenance applications.

Q: How many inserts are included in Heli-Coil R1191-4?
A: This SKU contains 12 identical inserts per package.

Q: What thread size does this insert repair?
A: It is designed for 1/4-28 UNF internal thread repair or reinforcement.

Q: Is this a locking insert?
A: No. R1191-4 is specified as a free running helical insert, intended for repairs where a locking feature is not required.