---
product_id: 26787772
title: "8020, 3381, 10 Series 1/4-20 Standard End Fastener and Screw Hardware Combo - T Slot Accessories for Aluminum Extrusion - 90 Degree Joint HW 80/20 (15 Pack)"
brand: "80/20"
price: "R1285"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/26787772-8020-3381-10-series-1-4-20-standard-end-fastener
store_origin: ZA
region: South Africa
---

# 1/4-20 button head socket cap bolt 15-pack for scalable projects 90° fixed, hidden joint 8020, 3381, 10 Series 1/4-20 Standard End Fastener and Screw Hardware Combo - T Slot Accessories for Aluminum Extrusion - 90 Degree Joint HW 80/20 (15 Pack)

**Brand:** 80/20
**Price:** R1285
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your frame game with invisible strength!

## Quick Answers

- **What is this?** 8020, 3381, 10 Series 1/4-20 Standard End Fastener and Screw Hardware Combo - T Slot Accessories for Aluminum Extrusion - 90 Degree Joint HW 80/20 (15 Pack) by 80/20
- **How much does it cost?** R1285 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/26787772-8020-3381-10-series-1-4-20-standard-end-fastener)

## Best For

- 80/20 enthusiasts

## Why This Product

- Trusted 80/20 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Pack Advantage:** 15-piece combo ensures you’re ready for multiple projects or large-scale builds.
- • **Precision Machined Fit:** Requires end tap and access hole for a secure, professional-grade assembly.
- • **Versatile Compatibility:** Perfect for 8020 T-slot profiles used in CNC, robotics, and industrial frames.
- • **Seamless 90° Connections:** Create sleek, invisible joints that elevate your aluminum extrusion builds.
- • **Moderate-Strength Durability:** Reliable hold without bulk—engineered for stability and clean aesthetics.

## Overview

This 15-pack of 8020 3381 Series end fasteners includes 1/4-20 button head socket cap screws and double wing clips designed to connect 1.0" aluminum extrusions at a precise 90° angle. The hidden fastening system requires machining for a clean, professional finish and is ideal for applications like CNC machines, 3D printers, and robotics, offering moderate-strength, durable joints that maintain sleek structural aesthetics.

## Description

The standard end fastener assembly is comprised of a button head socket cap screw and wing clip. The end fastener provides a fixed, 90 degree, moderate-strength connection that is completely hidden. The winged tabs of the clip prevent the mating profile from rotating. This connection method requires two machining services; an end tap on the mounting profile and an access hole in the mating profile in order to reach the screw head. Additional Information: Wing clips are available separately (without the button head socket cap screw) for instances where you want to create your own custom assembly.

## Features

- Each end fastener assembly includes a 1/4-20 button head socket cap bolt and a double wing clip. Used to connect two 1.0" extruded aluminum profiles at a 90 degree angle (machining is required).
- Provides a fixed, 90 degree connector with moderate-strength that is completely hidden on your 8020 aluminum extrusion.
- Popular 8020 hardware that is perfect for applications where you need a hidden connection and can be used with other t slot aluminum extrusion.
- This t-nut can be used in a wide variety of applications including 3d printers, cnc machine, building industrial aluminum frame structures, CNC laser cutters, Robotics Projects and more.
- NOTE: Requires two machining services to utilize: an end tap on mounting profile and an access hole in the mating profile to reach the screw head.

## Images

![8020, 3381, 10 Series 1/4-20 Standard End Fastener and Screw Hardware Combo - T Slot Accessories for Aluminum Extrusion - 90 Degree Joint HW 80/20 (15 Pack) - Image 1](https://m.media-amazon.com/images/I/51ZBWw3gxnL.jpg)

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**Shop now:** [https://www.desertcart.co.za/products/26787772-8020-3381-10-series-1-4-20-standard-end-fastener](https://www.desertcart.co.za/products/26787772-8020-3381-10-series-1-4-20-standard-end-fastener)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-05*