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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size - Free-Running Tanged Helical Inserts
HELI-COILFree-Running Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size

The HELI-COIL Helical Insert is a tanged tang style, free-running helical insert with a 1/4"-28 thread size, fine thread, and right-hand orientation. Made from 18-8 stainless steel metal with a dry film lubricant, it…

SKU 3G-OTH-599257

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size
Category
Free-Running Tanged Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
1191-4CNW250S
Type
Free-Running, 1,000 PK
Thread Size
1/4"-28
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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Helical Insert is a tanged tang style, free-running helical insert with a 1/4"-28 thread size, fine thread, and right-hand orientation. Made from 18-8 stainless steel metal with a dry film lubricant, it offers a tensile strength of 200,000 to 250,000 psi and comes in a 1,000-piece pack (MPN 1191-4CNW250S).

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal components. It is commonly used in automotive, aerospace, and industrial applications to restore stripped threads or provide stronger threads in softer materials like aluminum.

What are the specifications of the HELI-COIL 1191-4CNW250S?

This HELI-COIL insert is free-running, tanged tang style, with a 1/4"-28 fine thread, right-hand orientation. It is made from 18-8 stainless steel with dry film lubricant, offering tensile strength of 200,000 to 250,000 psi. Pack of 1,000 pieces.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial solutions provider, we handle logistics, customs, and delivery to your location. Contact us to order the 1191-4CNW250S or other HELI-COIL part numbers.

How to install a HELI-COIL tanged insert?

To install a HELI-COIL tanged insert, drill out the damaged thread to the specified tap drill size, tap the hole with the correct HELI-COIL tap, then wind the insert into the hole using a tang break-off tool. Break off the tang after installation.

Used in

Common applications for HELI-COIL
Aerospace engine repair — HELI-COIL STI taps for M12x1.75 metric threads in aluminum alloy components
Automotive transmission rebuild — HELI-COIL STI taps for 7/16-14 UNC threads in cast iron housings
Industrial pump maintenance — HELI-COIL STI taps for #10-32 UNF threads in stainless steel pump bodies
Hydraulic cylinder repair — HELI-COIL STI taps for M6x1 metric threads in steel cylinder heads
General manufacturing — HELI-COIL STI taps for 9/16-18 UNF threads in machinery base plates

HELI-COIL Products

3G Electric supplies HELI-COIL free-running tanged helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-18 Thread Size, Plain, Plain, 12 PK (MPN R327-4). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-18; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: ANPT.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-18 Thread Size, Plain, Plain, 12 PK (MPN R327-4). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-18; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: ANPT.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M5-0.80 Thread Size, Plain, Plain, 100 PK (MPN A1084-5EN100). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M5-0.80; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 5.2mm; attr798708: 200,000 psi.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M5-0.80 Thread Size, Plain, Plain, 100 PK (MPN A1084-5EN100). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M5-0.80; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 5.2mm; attr798708: 200,000 psi.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 5/16"-24 Thread Size, Plain, 100 PK (MPN A1191-5CN625). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 5/16"-24; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Fine.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 5/16"-24 Thread Size, Plain, 100 PK (MPN A1191-5CN625). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 5/16"-24; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Fine.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M3-0.50 Thread Size, Plain, Plain, 100 PK (MPN A1084-3EN090). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M3-0.50; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 3.15mm; attr798708: 200,000 psi.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M3-0.50 Thread Size, Plain, Plain, 100 PK (MPN A1084-3EN090). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M3-0.50; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 3.15mm; attr798708: 200,000 psi.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M10-1.25 Thread Size, Plain, Plain, 12 PK (MPN R4649-10). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M10-1.25; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Fine.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M10-1.25 Thread Size, Plain, Plain, 12 PK (MPN R4649-10). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M10-1.25; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Fine.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, #6-32 Thread Size, Plain, Plain, 100 PK (MPN A1185-06CN138). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #6-32; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Coarse.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, #6-32 Thread Size, Plain, Plain, 100 PK (MPN A1185-06CN138). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #6-32; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Coarse.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M6-1.00 Thread Size, Plain, Plain, 12 PK (MPN R1084-6). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M6-1.00; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Coarse.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M6-1.00 Thread Size, Plain, Plain, 12 PK (MPN R1084-6). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M6-1.00; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Coarse.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 3/4"-14 Thread Size, Plain, Plain, 5 PK (MPN K327-12). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 3/4"-14; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: ANPT.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 3/4"-14 Thread Size, Plain, Plain, 5 PK (MPN K327-12). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 3/4"-14; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: ANPT.