---
title: "What Are Solderable SMT Nuts Used For?"
description: "Solderable SMT Nuts (Trade series (solderable SMT nuts)) are used for adding a threaded mounting point to a circuit board during solder placement."
url: https://engineeringhardware.com/applications/solderable-smt-nuts/
source: Engineering Hardware & Fasteners
---

# What Are Solderable SMT Nuts Used For?

Nuts · Trade series (solderable SMT nuts) · Application guide

Typical applications, the industries that specify solderable smt nuts, and how to choose the right size, material and finish for the joint.

Solderable SMT Nuts are used for adding a threaded mounting point to a circuit board during solder placement. They are manufactured to Trade series (solderable SMT nuts), and the choice of size, property class and finish is driven by the load in the joint and the environment it sits in.

- **Primary duty:** Adding a threaded mounting point to a circuit board during solder placement
- **Governing standard:** Trade series (solderable SMT nuts)
- **Thread size range:** M2 to M5
- **Category:** Nuts

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

![What Are Solderable SMT Nuts Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/PEM-SMT-Nuts.webp)

Solderable SMT Nuts are selected when an assembly calls for adding a threaded mounting point to a circuit board during solder placement. This application guide to the Trade series (solderable SMT nuts) type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly M2 to M5, they cover light-duty and instrument-scale work.

## Typical Applications for Solderable SMT Nuts

The most common settings where these are specified:

- **PCB production:** Solderable nuts add threaded mounting points during board assembly.
- **Consumer electronics:** Tape-and-reel supply supports high-volume board placement.
- **Control electronics:** M2–M5 threads secure shields and board-mounted brackets.
- **Instrument modules:** Optional adhesive spots help hold the part during soldering.

Product catalog

## Related Solderable SMT Nuts products

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Hex & Other Standard Nuts

### [Heavy Duty 316 Stainless Steel Hex Nut](https://engineeringhardware.com/product/heavy-duty-316-stainless-steel-hex-nut/)

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### [Carbon Steel Galvanized 8.8 Grade Blind Rivet Waterproof Nuts](https://engineeringhardware.com/product/carbon-steel-galvanized-8-8-grade-blind-rivet-waterproof-nuts/)

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**US$0.012 – 0.096**MOQ 1,000 pieces

[View all Hex & Other Standard Nuts →](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) [Full product catalog](https://engineeringhardware.com/products/)

## How to Specify Solderable SMT Nuts for Your Application

- **Size:** Match the nominal size to the mating thread or hole. This product spans M2–M5; check the full table below for the exact dimensions of each size.
- **Locking & grade:** Match the strength grade to the bolt, and choose a locking style (nyloc, all-metal, serrated flange) if the joint sees vibration.
- **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 (solderable SMT nuts). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Installation & Assembly Practice

- Run the nut down by hand before applying the wrench to catch cross-threading early.
- Tighten the nut rather than the bolt head where access allows — the torque-to-preload relation is more consistent.
- For locking styles, note that nyloc inserts are single-use in critical joints and lose grip above roughly 120 °C.

## Common Selection Mistakes with Solderable SMT Nuts

- Pairing a high-class bolt with a lower-class nut — the nut strips before the bolt reaches proof load; the nut class must meet or exceed the bolt class.
- Using a plain nut with a spring washer in severe vibration instead of a prevailing-torque locking nut.
- Re-using nyloc nuts in critical joints.

## Where Solderable SMT Nuts Are Not the Right Choice

Not on their own — they need a matching bolt or stud — and a plain nut is not a substitute for a locking type under heavy vibration.

Custom manufacturing · Made to drawing

## Need a solderable SMT nuts outside the standard range?

Thread size is the obvious variable and rarely the interesting one — height for clearance, across-flats for the tool already in the cell, and the locking feature for the vibration actually present. Made by cold heading or tapping.

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

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

## Technical Drawing

Dimensioned line drawing of M2 Solderable SMT Nuts to Trade series (solderable SMT nuts). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Material:** tinned steel
- **Supply:** taped and reeled
- **Board installation:** solder into plated-through or non-plated hole
- **Adhesive spot:** with or without

## Dimensions & Specifications (Trade series (solderable SMT nuts))

| Thread size | Material | Supply | Board installation | Adhesive spot |
| --- | --- | --- | --- | --- |
| M2 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M2.5 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M3 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M4 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M5 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |

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 Solderable SMT Nuts used for?

Adding a threaded mounting point to a circuit board during solder placement. They are supplied to Trade series (solderable SMT nuts).

### Which industries use Solderable SMT Nuts?

They are commonly specified in control electronics, instrument modules and pcb production, among other sectors.

### How do I choose the right size of Solderable SMT Nuts?

Match the nominal size to the mating thread or hole. This product is available from M2 to M5; the full dimension table on this page lists each size.

### Do Solderable SMT Nuts need a locking feature?

If the joint sees vibration or cyclic load, use a locking style (nyloc, all-metal lock, or serrated flange) or a thread-locking adhesive. For static joints a standard nut tightened correctly is usually sufficient.

### Can I get a quote for Solderable SMT Nuts 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: [Solderable SMT Nuts — specifications & sizes](https://engineeringhardware.com/fastener/solderable-smt-nuts/)

### Solderable SMT Nuts Specification Guides

### Related Fastener Applications