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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/2"-20 Thread Size, Plain - Free-Running Tanged Helical Inserts
HELI-COILFree-Running Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/2"-20 Thread Size, Plain

The HELI-COIL Helical Insert (MPN R1191-8) is a tanged tang-style, free-running insert with a 1/2"-20 fine thread, right-hand orientation, and plain finish. Made from 18-8 stainless steel, it offers a tensile…

SKU 3G-OTH-598954

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Free-Running, 1/2"-20 Thread Size, Plain
Category
Free-Running Tanged Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
R1191-8
Type
Free-Running, Plain, Plain, 6 PK
Thread Size
1/2"-20
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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Helical Insert (MPN R1191-8) is a tanged tang-style, free-running insert with a 1/2"-20 fine thread, right-hand orientation, and plain finish. Made from 18-8 stainless steel, it offers a tensile strength of 200,000 to 250,000 psi and comes in a 6-pack. 3G Electric sources this genuine OEM insert across 14 industrial departments, with specialist expertise in fastening and assembly solutions.

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. This free-running tanged tang-style insert (1/2"-20 fine thread) restores stripped threads or strengthens soft materials, providing a durable 18-8 stainless steel thread with 200,000 to 250,000 psi tensile strength.

What are the specifications of the HELI-COIL R1191-8 insert?

The HELI-COIL R1191-8 is a free-running tanged tang-style insert with 1/2"-20 fine thread, right-hand orientation, plain finish, and 18-8 stainless steel construction. It delivers 200,000 to 250,000 psi tensile strength and comes in a 6-pack. 3G Electric supplies this genuine OEM part.

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 genuine OEM parts like the R1191-8 to any location. Contact us for availability and lead time on your order.

How to install a HELI-COIL tanged tang-style insert?

To install a HELI-COIL tanged tang-style 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 installation tool. After installation, break off the tang with a punch.

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, #2-56 Thread Size, Plain, Plain, 100 PK (MPN A1185-02CN172). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #2-56; 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, #10-32 Thread Size, Plain, 1,000 PK (MPN 1191-3CN285S). 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, 1,000 PK (MPN 1191-3CN285S). 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, M18-1.50 Thread Size, Plain, Plain, 6 PK (MPN R514-6). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M18-1.50; 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, M18-1.50 Thread Size, Plain, Plain, 6 PK (MPN R514-6). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M18-1.50; 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, 1/4"-28 Thread Size, 100 PK (MPN A1191-4CNW250). 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, 100 PK (MPN A1191-4CNW250). 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, #6-32 Thread Size, 100 PK (MPN A1185-06CNW138). 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, 100 PK (MPN A1185-06CNW138). 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, #10-24 Thread Size, 100 PK (MPN A1185-3CNW285). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #10-24; 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, #10-24 Thread Size, 100 PK (MPN A1185-3CNW285). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: #10-24; 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, 1/8"-27 Thread Size, Plain, Plain, 12 PK (MPN R327-2). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/8"-27; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: NPT.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/8"-27 Thread Size, Plain, Plain, 12 PK (MPN R327-2). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 1/8"-27; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 to 250,000 psi; attr798713: NPT.
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