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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #4-40 Thread Size, Plain - Free-Running Tangless Helical Inserts
HELI-COILFree-Running Tangless Helical Inserts

HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #4-40 Thread Size, Plain

The HELI-COIL Helical Insert (Tangless Tang Style) is a free-running, inch-system insert with #4-40 thread size and coarse, right-hand threads. Made from 18-8 material with a tensile strength of 200,000 to 250,000…

SKU 3G-OTH-527336

Brand
HELI-COIL
Item
Helical Insert: Tangless Tang Style, Free-Running, #4-40 Thread Size, Plain
Category
Free-Running Tangless Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
AT1185-04C112
Type
Free-Running, #4-40 Thread Size, Plain, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
#4-40
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Inch
View Full Spec Sheet

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Helical Insert (Tangless Tang Style) is a free-running, inch-system insert with #4-40 thread size and coarse, right-hand threads. Made from 18-8 material with a tensile strength of 200,000 to 250,000 psi, it is compatible with metal and supplied in a 100-piece pack (MPN AT1185-04C112).

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 Tangless Helical Insert used for?

A HELI-COIL Tangless Helical Insert repairs or reinforces threads in metal components. It provides a durable, free-running internal thread for #4-40 fasteners, commonly used in automotive, aerospace, and industrial assemblies where stripped or worn threads need restoration.

What are the specifications of the HELI-COIL AT1185-04C112 insert?

This HELI-COIL insert is a free-running, tangless style with #4-40 coarse, right-hand threads. It is made from 18-8 material with a tensile strength of 200,000 to 250,000 psi. The STI tap size is #4-40, and it comes in a 100-piece pack (MPN AT1185-04C112).

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, including the AT1185-04C112, to your facility. Contact us for a quote and delivery options.

How to install a tangless helical insert?

To install a tangless helical insert, drill and tap the hole to the specified STI tap size (#4-40). Use a tangless installation tool to wind the insert into the tapped hole until it sits slightly below the surface. No tang removal is needed, simplifying the process.

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 tangless 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: Tangless Tang Style, Free-Running, #4-40 Thread Size, Plain, Plain, 100 PK (MPN AT1185-04C224). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: #4-40; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Coarse.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #2-56 Thread Size, Plain, 1,000 PK (MPN T1185-02C086S). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: #2-56; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Drill Bit Size: 3/32; Tensile Strength: 200,000 to 250,000 psi.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #2-56 Thread Size, Plain, 1,000 PK (MPN T1185-02C086S). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: #2-56; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Drill Bit Size: 3/32; Tensile Strength: 200,000 to 250,000 psi.
HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #10-24 Thread Size, Plain, 100 PK (MPN AT1185-3C380). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: #10-24; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Coarse.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, 1/4"-28 Thread Size, Plain, 100 PK (MPN AT1191-4C500). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: 1/4"-28; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Fine.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, #2-56 Thread Size, Plain, Plain, 100 PK (MPN AT1185-02C086). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: #2-56; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Coarse.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, 1/4"-20 Thread Size, Plain, 1,000 PK (MPN T1185-4C250S). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: 1/4"-20; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Coarse.
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HELI-COIL Helical Insert: Tangless Tang Style, Free-Running, 1/4"-20 Thread Size, Plain, 1,000 PK (MPN T1185-4C250S). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: 1/4"-20; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Coarse.
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