---
product_id: 4705392
title: "SWTC-S21 Nut & Bolt (SAE/Inch)"
brand: "thread checker"
price: "₨1355"
currency: SCR
in_stock: true
url: https://www.desertcart.sc/products/4705392-swtc-s21-nut-and-bolt-sae-inch
store_origin: SC
region: Seychelles
---

# Compact dimensions 23 common sizes Zinc plated steel SWTC-S21 Nut & Bolt (SAE/Inch)

**Brand:** thread checker
**Price:** ₨1355
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your DIY Game with Precision!

## Quick Answers

- **What is this?** SWTC-S21 Nut & Bolt (SAE/Inch) by thread checker
- **How much does it cost?** ₨1355 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/4705392-swtc-s21-nut-and-bolt-sae-inch)

## Best For

- thread checker enthusiasts

## Why This Product

- Trusted thread checker brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **🧰 Durable Design:** Constructed from high-grade zinc plated alloy steel for longevity.
- • **📏 Compact & Portable:** Measuring just 6 x 4 x 1 inches, it's perfect for any toolbox.
- • **🔄 Effortless Rotation:** Gauges rotate freely for fast and accurate measurements.
- • **🖇️ Convenient Hanging:** Includes a wire cable loop for easy storage and access.
- • **🔍 Instant Thread Verification:** Quickly check 23 SAE/Inch sizes with ease.

## Overview

The Thread Checker SWTC-S21 Nut & Bolt gauge is a must-have tool for professionals and DIY enthusiasts alike. Featuring 23 of the most common SAE/Inch sizes, this durable gauge is made from high-grade zinc plated alloy steel, ensuring longevity and reliability. Its compact design allows for easy storage, while the rotating gauges provide quick and accurate thread verification. Perfect for any toolbox, this tool combines functionality with convenience.

## Description

SWTC-S21 Nut & Bolt (SAE/Inch)

## Features

- Each size has a nut and bolt checker on the same gauge. 23 of the most common SAE/Inch sizes!
- Thread sizes are permanently stamped (in red) onto each gauge.
- Wire cable with loop for convenient hanging.
- The individual gauges rotate freely on the wire cable for fast thread verification.
- Gauges are a zinc plated high grade steel.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Alloy Steel |
| Drive System | Double Square |
| Head Style | Binding |
| Item Dimensions LxWxH | 6 x 4 x 1 inches |
| Exterior Finish | Zinc,Steel |
| Thread Size | 1/4"-20 |
| Metal Type | Alloy Steel, Zinc |
| Brand | Thread Checker |
| Color | Metal |
| Item Weight | 8 Ounces |
| Thread Coverage | Fully Threaded |
| Thread Style | Right Hand |
| Size | Multi |
| Manufacturer | Thread Checker |
| Part Number | SWTC-S21 |
| Item Weight | 8 ounces |
| Product Dimensions | 6 x 4 x 1 inches |
| Item model number | SWTC-S21 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Measurement System | Imperial |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | No |

## Images

![SWTC-S21 Nut & Bolt (SAE/Inch) - Image 1](https://m.media-amazon.com/images/I/61Kq4v58KNL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Unclear from the description, but are these for "fine" or "coarse" or a mix?**
A: Mine started with 6-40 (fine thread) and went up from there. I bought both the SAE and metric. They are great for determining threaded holes in machine restorations and simple thread and size identification.

**Q: Are these thread checkers marked "Made in the USA"?**
A: I guess the answer is "no".  There is a "key chain" at one end that says "The original Thread Checker -  United States Patent #7877882, but other than that there are no markings except for the sizes on each piece.

**Q: I need one of these that goes down to 2-56 sae and m3 metric.  anybody seen such a beast?**
A: Bolt Depot.com has SAE 1-64 to #5-40, 9 pcs, or Metric M12-0.25 to M3.5-0.35 12 pcs. Each are $17.00.

**Q: are these made of aluminum?**
A: Hey, these definitely aren't made of aluminum. Steel for sure, possibly stainless (mine aren't rusty after all these years, anyway). Quality product and quite useful for checking threads in odd places that a thread-card can't reach. Saved me a lot of trouble more than once.

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**Shop now:** [https://www.desertcart.sc/products/4705392-swtc-s21-nut-and-bolt-sae-inch](https://www.desertcart.sc/products/4705392-swtc-s21-nut-and-bolt-sae-inch)

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-03-08*