---
product_id: 366559893
title: "Alcoa Fastening Systems MRM47881 UNC Steel Inserts - Pack of 25"
brand: "alcoa fastening systems & rings"
price: "199 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/366559893-alcoa-fastening-systems-mrm47881-unc-steel-inserts-pack-of-25
store_origin: PL
region: Poland
---

# High torque resistance 3/8-16 UNC-2B Zinc exterior finish Alcoa Fastening Systems MRM47881 UNC Steel Inserts - Pack of 25

**Brand:** alcoa fastening systems & rings
**Price:** 199 zł
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Fastening Game!

## Quick Answers

- **What is this?** Alcoa Fastening Systems MRM47881 UNC Steel Inserts - Pack of 25 by alcoa fastening systems & rings
- **How much does it cost?** 199 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/366559893-alcoa-fastening-systems-mrm47881-unc-steel-inserts-pack-of-25)

## Best For

- alcoa fastening systems & rings enthusiasts

## Why This Product

- Trusted alcoa fastening systems & rings brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Value Pack:** Get 25 inserts to tackle multiple projects with ease.
- • **Minimal Protrusion:** Enjoy a sleek installation with minimal backside protrusion.
- • **Unmatched Durability:** Crafted from premium carbon steel for long-lasting performance.
- • **Precision Engineering:** Designed with a 360-degree swaging action for a perfect fit.
- • **Versatile Compatibility:** Ideal for materials with thicknesses from 0.030 to 0.090 inches.

## Overview

The Alcoa Fastening Systems MRM47881 UNC Steel Inserts come in a convenient pack of 25, featuring a robust carbon steel construction and a zinc exterior finish. Designed for precision and durability, these inserts are perfect for a variety of applications, ensuring a secure fit with minimal protrusion.

## Description

Alcoa Fastening Systems MRM47881 UNC Steel Inserts - Pack of 25

## Features

- Thread-sert has small flange, 360-Deg swaging action in the hole and no maximum grip range
- Provides high resistance to torque out with minimal backside protrusion
- Pack of 25Specifications
- Thread Size: 3/8-16 UNC-2B
- Hole Size of Material Thickness 0.030 - 0.090 Inch (0.76 - 2.29mm):

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Carbon Steel |
| Fastener Type | Flange |
| Exterior Finish | Zinc |
| Color | Clear |
| Metal Type | Alloy Steel, Carbon Steel |
| Brand | Alcoa Fastening Systems & Rings |
| Thread Type | Unified National Coarse |
| Manufacturer | Alcoa Fastening Systems & Rings |
| Part Number | MRM47881 |
| Item Package Quantity | 25 |

## Images

![Alcoa Fastening Systems MRM47881 UNC Steel Inserts - Pack of 25 - Image 1](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/31v1+8TVT0L.jpg)

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**Shop now:** [https://www.desertcart.pl/products/366559893-alcoa-fastening-systems-mrm47881-unc-steel-inserts-pack-of-25](https://www.desertcart.pl/products/366559893-alcoa-fastening-systems-mrm47881-unc-steel-inserts-pack-of-25)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-03*