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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 5/16"-24 Thread Size, Plain - Free-Running Tanged Helical Inserts
HELI-COILFree-Running Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 5/16"-24 Thread Size, Plain

The HELI-COIL Helical Insert is a tanged tang-style, free-running helical insert with a 5/16"-24 fine thread, right-hand orientation, and plain finish. Made from 18-8 stainless steel (metal), it offers a tensile…

SKU 3G-OTH-599182

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Free-Running, 5/16"-24 Thread Size, Plain
Category
Free-Running Tanged Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
1191-5CN312S
Type
Free-Running, Plain, 500 PK
Thread Size
5/16"-24
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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 5/16"-24 fine thread, right-hand orientation, and plain finish. Made from 18-8 stainless steel (metal), it offers a tensile strength range of 200,000 to 250,000 psi and comes in a 500-piece pack (MPN 1191-5CN312S).

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 tapped threads in metal. This free-running tanged style with 5/16"-24 fine thread restores strength in aluminum, cast iron, or steel components. It is ideal for automotive, aerospace, and industrial maintenance applications where thread integrity is critical.

What are the specifications of the HELI-COIL 1191-5CN312S insert?

This HELI-COIL insert is a free-running, tanged tang style with 5/16"-24 fine thread, right-hand orientation, and plain finish. It is made from 18-8 stainless steel with tensile strength of 200,000 to 250,000 psi. Supplied in a 500-piece pack (MPN 1191-5CN312S).

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 HELI-COIL products to your facility. Contact us for pricing and lead time on the 1191-5CN312S 500-pack.

How to install a tanged helical insert?

Installation requires drilling out the damaged thread, tapping to the specified size, then using a tang drive tool to insert the HELI-COIL coil. After insertion, break off the tang with a punch. Always follow the manufacturer's instructions for proper thread depth and tool selection.

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, 3/8"-16 Thread Size, Plain, Plain, 100 PK (MPN A1185-6CN375). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 3/8"-16; 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, 3/8"-16 Thread Size, Plain, Plain, 100 PK (MPN A1185-6CN375). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 3/8"-16; 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, 5/16"-18 Thread Size, Plain, 500 PK (MPN 1185-5CN625S). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 5/16"-18; 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, 5/16"-18 Thread Size, Plain, 500 PK (MPN 1185-5CN625S). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 5/16"-18; 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, 7/16"-14 Thread Size, Plain, Plain, 6 PK (MPN R1185-7). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 7/16"-14; 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, 7/16"-14 Thread Size, Plain, Plain, 6 PK (MPN R1185-7). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 7/16"-14; 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, M4-0.70 Thread Size, Plain, Plain, 100 PK (MPN A1084-4EN120). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M4-0.70; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 4.2mm; attr798708: 200,000 psi.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, M4-0.70 Thread Size, Plain, Plain, 100 PK (MPN A1084-4EN120). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: M4-0.70; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 4.2mm; attr798708: 200,000 psi.
HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-20 Thread Size, Plain, Plain, 100 PK (MPN A1185-4EN750). Key specifications — attr798694: Nitronic 60; attr798710: Right Hand; attr798707: 1/4"-20; attr798676: Metal; attr798705: Inch; attr798675: HELI-COIL; attr798708: 200,000 psi; attr798713: Coarse.
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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 3/8"-24 Thread Size, Plain, Plain, 12 PK (MPN R1191-6). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: 3/8"-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, M5-0.80 Thread Size, Plain, 1,000 PK (MPN 1084-5CN050S). Key specifications — attr798694: 18-8; attr798710: Right Hand; attr798707: M5-0.80; attr798676: Metal; attr798705: Metric; attr798675: HELI-COIL; attr798681: 5.2mm; attr798708: 200,000 to 250,000 psi.