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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 insert in a 100-pack. It is made of 18-8 metal with a dry film lubricant, featuring a 1/4"-28 fine, right-hand thread and a tensile strength of…

SKU 3G-OTH-599235

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
A1191-4CNW500
Type
Free-Running, 100 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 insert in a 100-pack. It is made of 18-8 metal with a dry film lubricant, featuring a 1/4"-28 fine, right-hand thread and a tensile strength of 200,000 to 250,000 psi.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal, preventing stripping in soft materials like aluminum. This free-running tanged style with 1/4"-28 fine thread is common in automotive, aerospace, and industrial assemblies where strong, reusable threads are required.

What are the specifications of the HELI-COIL A1191-4CNW500 insert?

This HELI-COIL insert is a free-running, tanged tang style in a 100-pack. It has a 1/4"-28 fine, right-hand thread, is made of 18-8 metal with dry film lubricant, and offers tensile strength of 200,000 to 250,000 psi. It is inch-sized for metal applications.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this 100-pack of 1/4"-28 free-running inserts to your facility. Contact us for availability and lead time.

How to install a HELI-COIL tanged helical insert?

To install a HELI-COIL tanged insert, drill to the specified tap drill size, tap the hole with the correct HELI-COIL tap, then use a tang-style installation tool to wind the insert into the thread. After installation, break off the tang with a punch. Always follow the manufacturer's instructions.

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, 1/2"-14 Thread Size, Plain, Plain, 5 PK (MPN K327-8). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/2"-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, #10-32 Thread Size, Plain, Plain, 100 PK (MPN A1191-3CN380). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #10-32; 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, #10-32 Thread Size, Plain, Plain, 100 PK (MPN A1191-3CN380). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #10-32; 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, #4-40 Thread Size, 100 PK (MPN A1185-04CNW224). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #4-40; 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, #4-40 Thread Size, 100 PK (MPN A1185-04CNW224). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #4-40; 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, 1/4"-28 Thread Size, Plain, Plain, 100 PK (MPN A1191-4CN375). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-28; 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, 1/4"-28 Thread Size, Plain, Plain, 100 PK (MPN A1191-4CN375). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-28; 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, #5-40 Thread Size, Stainless Steel, 12 PK (MPN R1185-05). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #5-40; 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, #5-40 Thread Size, Stainless Steel, 12 PK (MPN R1185-05). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #5-40; 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, M18-2.50 Thread Size, Plain, Plain, 6 PK (MPN R1084-18). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M18-2.50; 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, M18-2.50 Thread Size, Plain, Plain, 6 PK (MPN R1084-18). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M18-2.50; 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, 1/4"-20 Thread Size, Plain, Plain, 100 PK (MPN A1185-4CN500). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-20; 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, 1/4"-20 Thread Size, Plain, Plain, 100 PK (MPN A1185-4CN500). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/4"-20; 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, 5/8"-11 Thread Size, Plain, Plain, 6 PK (MPN R1185-10). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 5/8"-11; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: Coarse.
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