---
title: "What Are PTFE Thread Seal Tape Used For?"
description: "PTFE Thread Seal Tapes (Trade series (PTFE thread sealing tape, colour-coded by density)) are used for containing fluid or excluding contamination at a stati…"
url: https://engineeringhardware.com/applications/ptfe-thread-seal-tape/
source: Engineering Hardware & Fasteners
---

# What Are PTFE Thread Seal Tape Used For?

Seals · Trade series (PTFE thread sealing tape, colour-coded by density) · Application guide

Typical applications, the industries that specify ptfe thread seal tape, and how to choose the right size, material and finish for the joint.

PTFE Thread Seal Tapes are used for containing fluid or excluding contamination at a static or dynamic interface. They are manufactured to Trade series (PTFE thread sealing tape, colour-coded by density), and selection is driven by the inside diameter, the fit and tolerance the assembly requires, and the service environment.

- **Primary duty:** Containing fluid or excluding contamination at a static or dynamic interface
- **Governing standard:** Trade series (PTFE thread sealing tape, colour-coded by density)
- **Category:** Seals

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

![What Are PTFE Thread Seal Tape Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/PTFE-Thread-Seal-Tape.webp)

PTFE Thread Seal Tapes are selected when an assembly calls for containing fluid or excluding contamination at a static or dynamic interface. This application guide to the Trade series (PTFE thread sealing tape, colour-coded by density) type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better.

## Typical Applications for PTFE Thread Seal Tape

The most common settings where these are specified:

- **General machine building:** fastening covers, brackets, motors and sub-assemblies on production equipment.
- **Maintenance & repair (MRO):** a stocked size for servicing existing plant where the original fastener spec must be matched.
- **Fabrication & metalwork:** bench and on-site assembly of steel frames, enclosures and weldments.

Product catalog

## Related Thread Sealants & Threadlockers products

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**US$0.012 – 0.06**MOQ 10,000 pieces

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**US$1,080 – 1,560**MOQ 1 ton

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## How to Specify PTFE Thread Seal Tape for Your Application

- **Size:** Match the size to the mating part — see the dimension table below for each option.
- **Material:** Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- **Environment:** For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- **Standard:** This product is supplied to Trade series (PTFE thread sealing tape, colour-coded by density). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Where PTFE Thread Seal Tape Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Custom manufacturing · Made to drawing

## Need a PTFE thread seal tape outside the standard range?

A special seal is almost always a compound change rather than a size change — the same dimensions in a material that survives the medium.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom seal manufacturing](https://engineeringhardware.com/custom/seals/)[Send a drawing](https://engineeringhardware.com/custom/seals/#rfq)

## Technical Drawing

Dimensioned line drawing of white PTFE Thread Seal Tape to Trade series (PTFE thread sealing tape, colour-coded by density). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Density:** standard density
- **Intended service:** water and general plumbing
- **Notes:** general purpose

## Dimensions & Specifications (Trade series (PTFE thread sealing tape, colour-coded by density))

| Colour | Density | Intended service | Notes |
| --- | --- | --- | --- |
| white | standard density | water and general plumbing | general purpose |
| pink | high density | water, larger threads | thicker, fewer wraps needed |
| yellow | high density | gas lines | gas-rated tape |
| green | oil-free, degreased | oxygen service | must be oxygen-clean |
| grey | with filler | stainless steel threads | reduces galling on stainless |

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### What are PTFE Thread Seal Tape used for?

Containing fluid or excluding contamination at a static or dynamic interface. They are supplied to Trade series (PTFE thread sealing tape, colour-coded by density).

### Which industries use PTFE Thread Seal Tape?

They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors.

### How do I choose the right size of PTFE Thread Seal Tape?

Match the size to the mating part using the dimension table on this page.

### Are PTFE Thread Seal Tape made to a recognized standard?

Yes — they are manufactured to Trade series (PTFE thread sealing tape, colour-coded by density), so dimensions are interchangeable between suppliers when you quote the standard on your order.

### Can I get a quote for PTFE Thread Seal Tape in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.

## Related Pages

Product page: [PTFE Thread Seal Tape — specifications & sizes](https://engineeringhardware.com/fastener/ptfe-thread-seal-tape/)

### PTFE Thread Seal Tape Specification Guides

### Related Fastener Applications