Skip to content
Pro-grade auto-body supply · Any quantity · 13,000+ SKUs in stock
13,000+ pro-grade SKUs in stock
Order in · ships today Ships next business day
Helicoil Thread Inserts

Helicoil Thread Inserts Thread Repair Kit - 5521-4

No reviews yet
$37.06
In stock
Order within ships today
Authorized dealer
Ships today
30-day returns
Overview

Built for the job.

HeliCoil inserts are precision formed screw thread coils of extremely hard diamond shaped 304 stainless steel wire. When installed into Helicoil tapped holes, screw thread inserts provide permanent conventional 60 degree internal screw threads that accommodate any standard bolt or screw.

Why Pros Choose Helicoil Thread Inserts HEL

  • HeliCoil inserts are precision formed screw thread coils of extremely hard diamond shaped 304 stainless steel wire. When installed into Helicoil tapped holes, screw thread inserts provide permanent conventional 60 degree internal screw threads that accommodate any standard bolt or screw.

Compatibility

Compatible substrates: Steel, Stainless.

Specifications

Technical specifications for SAE Thread Repair Kit - 5521-4
Part No. 5521-4
Product Line HEL
Manufacturer Helicoil Thread Inserts
UPC 0002596410019

About Helicoil Thread Inserts

Helicoil Thread Inserts is a trusted manufacturer of professional auto body and refinish products used by collision repair shops and restoration specialists across North America.

Frequently Asked Questions

What surfaces can Helicoil Thread Inserts HEL be used on?

Helicoil Thread Inserts HEL is compatible with Steel, Stainless. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.

How fast does autofxmart ship Helicoil Thread Inserts HEL?

Most in-stock orders for Helicoil Thread Inserts HEL ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.

Is this Helicoil Thread Inserts product genuine?

Yes. autofxmart is an authorized distributor of Helicoil Thread Inserts products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.

What is the manufacturer part number (MPN) for Helicoil Thread Inserts HEL?

The MPN for Helicoil Thread Inserts HEL is 5521-4. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.

Why Buy from autofxmart

  • Authorized distributor — authentic, factory-fresh stock.
  • Fast US shipping — most orders ship within 1 business day.
  • 30-day returns — buy with confidence.
  • Pro-shop pricing — bulk discounts available on request.
  • Expert support — questions? Email us at support@autofxmart.com.
How to apply

Steps

1Read the product's instructions before first use.
2Set it up and check fittings/connections.
3Use steady, even technique for consistent results.
4Clean after use to keep it performing.
5Store dry and protected between jobs.
Specifications

Full data

BrandHelicoil Thread Inserts
Part #5521-4
UPC0002596410019
ApplicationHeliCoil inserts are precision formed screw thread coils of extremely
OriginUS
ConditionNew
Frequently asked

Good to know

Helicoil Thread Inserts HEL is compatible with Steel, Stainless. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
Most in-stock orders for Helicoil Thread Inserts HEL ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Yes. autofxmart is an authorized distributor of Helicoil Thread Inserts products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
The MPN for Helicoil Thread Inserts HEL is 5521-4. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.

What Our Customers Say

Thanks! Your review was submitted and will appear after moderation.

No reviews yet — be the first to review this product.