---
title: "What Are Low-Profile Captive Pins Used For?"
description: "Low-Profile Captive Pins (Trade series (captive tack pins)) are used for providing a permanently captive locating pin in a thin panel without losing the low-…"
url: https://engineeringhardware.com/applications/low-profile-captive-pins/
source: Engineering Hardware & Fasteners
---

# What Are Low-Profile Captive Pins Used For?

Standoffs & Spacers · Trade series (captive tack pins) · Application guide

Typical applications, the industries that specify low-profile captive pins, and how to choose the right size, material and finish for the joint.

Low-Profile Captive Pins are used for providing a permanently captive locating pin in a thin panel without losing the low-profile head. They are manufactured to Trade series (captive tack pins), and selection is driven by the size designation, the fit and tolerance the assembly requires, and the service environment.

- **Primary duty:** Providing a permanently captive locating pin in a thin panel without losing the low-profile head
- **Governing standard:** Trade series (captive tack pins)
- **Size designation range:** T4-10-025 to TA-10-025
- **Category:** Standoffs & Spacers

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

![What Are Low-Profile Captive Pins Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/PEM-Low-Profile-Captive-TackPins.webp)

Low-Profile Captive Pins (Trade series (captive tack pins)) are specified where the joint requires providing a permanently captive locating pin in a thin panel without losing the low-profile head. The sections below cover the typical end-uses by industry, the size and material decisions for each, assembly practice, and the applications this fastener type is not suited to. Stocked across roughly 4 to 10, they cover general to heavy-duty work.

## Typical Applications for Low-Profile Captive Pins

The most common settings where these are specified:

- **Thin sheet panels:** Low-profile captive pins stay attached to panels only a few thousandths of an inch thick.
- **Circuit boards:** Small stainless or aluminum pins support repeatable positioning.
- **Electronics housings:** The head height leaves minimal projection above the panel.
- **Instrument assemblies:** Captive hardware prevents a pin from being lost during service.

Product catalog

## Related Low-Profile Captive Pins products

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Dowel & Locating Pins

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**US$13.61**MOQ 1,000,000 pieces

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### [China Manufacturer Precision 3.175 Fabric Dowel Pins 4140](https://engineeringhardware.com/product/china-manufacturer-precision-3-175-fabric-dowel-pins-4140/)

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**US$0.60 – 1.19**MOQ 500 pieces

[![Insulation Fastener Plastic Thermal Insulation Fixing Dowel Insulation Dowels for Dry Wall](https://img.engineeringhardware.com/Insulation-Fastener-Plastic-Thermal-Insulation-Fixing-Dowel-Insulation-Dowels-for-Dry-Wall.webp)](https://engineeringhardware.com/product/insulation-fastener-plastic-thermal-insulation-fixing-dowel-insulation-dowels-for/)

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### [Insulation Fastener Plastic Thermal Insulation Fixing Dowel Insulation Dowels for Dry Wall](https://engineeringhardware.com/product/insulation-fastener-plastic-thermal-insulation-fixing-dowel-insulation-dowels-for/)

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Pin · Stainless Steel

**US$0.012 – 2.40**MOQ 2,000 pieces

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[View all Dowel & Locating Pins →](https://engineeringhardware.com/fastener-products/pins-dowel-fasteners/dowel-locating-pins/) [Full product catalog](https://engineeringhardware.com/products/)

## How to Specify Low-Profile Captive Pins for Your Application

- **Size:** Match the nominal size to the mating thread or hole. This product spans 4–10; check the full table below for the exact dimensions of each size.
- **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 (captive tack pins). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Where Low-Profile Captive Pins 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 low-profile captive pins outside the standard range?

A non-standard standoff & spacer is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by tapping or turning.

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

[Custom standoff & spacer manufacturing](https://engineeringhardware.com/custom/standoffs-spacers/)[Send a drawing](https://engineeringhardware.com/custom/standoffs-spacers/#rfq)

## Technical Drawing

Dimensioned line drawing of T4-10-025 Low-Profile Captive Pins to Trade series (captive tack pins). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Pin diameter (in):** 0.051
- **Pin length (in):** 0.040
- **Head diameter (in):** 0.079
- **Head height (in):** 0.008
- **Panel thickness (in):** 0.008~0.011; minimum 0.035
- **Installation hole (in):** 0.051
- **Material:** 400-series stainless steel

## Dimensions & Specifications (Trade series (captive tack pins))

| Part form | Pin diameter (in) | Pin length (in) | Head diameter (in) | Head height (in) | Panel thickness (in) | Installation hole (in) | Material |
| --- | --- | --- | --- | --- | --- | --- | --- |
| T4-10-025 | 0.051 | 0.040 | 0.079 | 0.008 | 0.008~0.011; minimum 0.035 | 0.051 | 400-series stainless steel |
| TA-10-025 | 0.051 | 0.040 | 0.079 | 0.008 | 0.008~0.011; minimum 0.035 | 0.051 | aluminum |

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

### Which industries use Low-Profile Captive Pins?

They are commonly specified in thin sheet panels, circuit boards and electronics housings, among other sectors.

### How do I choose the right size of Low-Profile Captive Pins?

Match the nominal size to the mating thread or hole. This product is available from 4 to 10; the full dimension table on this page lists each size.

### What material should Low-Profile Captive Pins be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

### Are Low-Profile Captive Pins made to a recognized standard?

Yes — they are manufactured to Trade series (captive tack pins), so dimensions are interchangeable between suppliers when you quote the standard on your order.

### Can I get a quote for Low-Profile Captive Pins 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: [Low-Profile Captive Pins — specifications & sizes](https://engineeringhardware.com/fastener/low-profile-captive-pins/)

### Low-Profile Captive Pins Specification Guides

### Related Fastener Applications