---
product_id: 41805686
title: "Red Head LDT-3840 Large Diameter Tapcon 3/8-Inch by 4-Inch Anchor (50 per Box)"
brand: "redhead"
price: "SAR 502"
currency: SAR
in_stock: true
reviews_count: 8
category: "Red Head"
url: https://www.desertcart.com.sa/products/41805686-red-head-ldt-3840-large-diameter-tapcon-3-8-inch
store_origin: SA
region: Saudi Arabia
---

# 3/8-inch diameter for heavy-duty hold Installs in less than half the time of wedges Hardened carbon steel, Grade 8 strength Red Head LDT-3840 Large Diameter Tapcon 3/8-Inch by 4-Inch Anchor (50 per Box)

**Brand:** redhead
**Price:** SAR 502
**Availability:** ✅ In Stock

## Summary

> 🔧 Secure your projects faster with Red Head’s unstoppable anchors!

## Quick Answers

- **What is this?** Red Head LDT-3840 Large Diameter Tapcon 3/8-Inch by 4-Inch Anchor (50 per Box) by redhead
- **How much does it cost?** SAR 502 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/41805686-red-head-ldt-3840-large-diameter-tapcon-3-8-inch)

## Best For

- redhead enthusiasts

## Why This Product

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

## Key Features

- • **Premium Durability:** Hardened carbon steel with zinc plating resists corrosion and wear
- • **Self-Tapping Power:** Cuts its own threads into concrete for a rock-solid grip
- • **Anti-Rotation Design:** Hex washer head with serrations prevents loosening under stress
- • **Clear Identification:** Stamped length code for quick inspection and quality assurance
- • **Fast & Efficient Installation:** Drill, drive, done—no nuts, washers, or grinding required

## Overview

The Red Head LDT-3840 Large Diameter Tapcon anchors are 3/8-inch by 4-inch self-tapping concrete fasteners made from hardened carbon steel with zinc plating for superior strength and corrosion resistance. Featuring a hex washer head with anti-rotation serrations and stamped length codes, these anchors install quickly using standard drill bits and deliver high pullout resistance with no need for additional hardware. Ideal for professional-grade concrete fastening, they reduce installation time by over 50% compared to traditional wedge anchors.

## Description

From the Manufacturer Red Head Large Diameter Tapcon 3/8 X 4 Inch Anchor is a high performance anchor that cuts its own threads into concrete. The anchor bodies are made of hardened carbon steel and zinc plated, Grade 5. The anchors have a finished hex washer head with anti-rotation serrations to prevent anchor back-out, and the head of the anchor is stamped with a length identification code for easy inspection. The anchors should be installed with carbide tipped hammer drill bits made in accordance to ANSI B212.15-1994. Use standard ANSI bits instead of proprietary bits, which will reduce the chances for anchor failure due to incorrect bit usage, and will cut costs. The Large Diameter anchors install in less than half the time of wedge anchors or adhesive anchors, by simply drilling a pilot hole and drive the LDT anchor by hand or impact. They remove easily, no torching or grinding required to remove anchors. The Red Head anchors have a single piece design, no nut and washer to assemble, and more threads for better thread engagement and higher pullout resistance. The Large Diameter Tapcon anchors have closer edge/spacing distance than mechanical anchors, and higher loads in shallow embedments. Specs: Anchor Diameter - 3/8 inch; Socket Size - 9/16; Drill Bit Diameter - 5/16 inch; Effective Length - 4 inch; Max. Thickness of Material to be Fastened - 2-1/2-Inch inch.

Review: Perfect! - Exactly what we were looking for, delivered quickly and for 75% lower cost than the local hardware store!!!
Review: Easy to drive and set - These work the best of several types of concrete fasteners I have been trying lately so I can recommend them to others. They have large diameters compared to the size hole that needs to be drilled to screw them into place so that is a big plus. They screw in easily and get a good "bite" to secure their position. The smaller holes required helps speed up their use compared to the expanding end type of fastener AND they stay where you set them unlike the expanding end type.

## Features

- Cuts it's Own Threads into Concrete
- Anchor Bodies are Made of Hardened Carbon Steel and Zinc Plated, Grade 8
- Finished Hex Washer Head, with Anti-Rotation Serrations
- Anchor is Stamped with a Length Identification Code
- Use Standard Drill Bits

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0009AHMCK |
| Best Sellers Rank | #161,476 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #135 in Concrete Screws |
| Brand | RedHead |
| Color | Zinc |
| Compatible Groove Diameter | 0.38 inches |
| Customer Reviews | 4.2 out of 5 stars 98 Reviews |
| Drive System | External Hex |
| Exterior Finish | Zinc |
| Fastener Size | 3/8' x 4' |
| Fastener Type | Self-tapping Tapcon screw with 3/8 inch thread size |
| Finish Types | Zinc Plated |
| Global Trade Identification Number | 00662520083361 |
| Grade Rating | grade_ 8 |
| Head Style | Flanged Hex |
| Head Type | Hex |
| Item Diameter | 0.38 inches |
| Item Dimensions | 8 x 5 x 2.5 inches |
| Item Weight | 5.6 pounds |
| Item dimensions L x W x H | 8 x 5 x 2.5 inches |
| Manufacturer | Red Head |
| Material | Carbon Steel |
| Material Type | Carbon Steel |
| Metal Type | Zinc,Carbon Steel |
| Model | LDT-3840 |
| Number Of Items | 50 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Outside Diameter | 0.38 inches |
| Part Number | LDT-3840 |
| Point Style | Hex Washer Head |
| Screw Head Style | Flanged Hex |
| Screw Point Style | Hex Washer Head |
| Set Name | Box of 50 |
| Set Screw Thread Type | Unified National Coarse (UNC) |
| Size Name | 4 inches |
| Thread Coverage | Partially Threaded |
| Thread Size | 3/8" |
| Thread Style | Right Hand Fully Threaded |
| Thread Type | Hi-lo |
| UPC | 662520083361 |
| Unit Count | 1 Count |
| Warranty Description | No Warranty |

## Images

![Red Head LDT-3840 Large Diameter Tapcon 3/8-Inch by 4-Inch Anchor (50 per Box) - Image 1](https://m.media-amazon.com/images/I/61OZ3+gI48L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect!
*by M***. on May 25, 2021*

Exactly what we were looking for, delivered quickly and for 75% lower cost than the local hardware store!!!

### ⭐⭐⭐⭐⭐ Easy to drive and set
*by M***E on January 21, 2022*

These work the best of several types of concrete fasteners I have been trying lately so I can recommend them to others. They have large diameters compared to the size hole that needs to be drilled to screw them into place so that is a big plus. They screw in easily and get a good "bite" to secure their position. The smaller holes required helps speed up their use compared to the expanding end type of fastener AND they stay where you set them unlike the expanding end type.

### ⭐⭐⭐⭐⭐ Just what I needed
*by D***. on January 16, 2021*

I used these to attach a gazebo through deck boards into concrete footing. Only finished a couple weeks ago. Already have had some Santa Ana winds and the gazebo doesn't move at all. The bolts felt very sturdy. They took a bit of torque to screw them down with a foot long socket wrench. But that made them fell very strong.

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*Product available on Desertcart Saudi Arabia*
*Store origin: SA*
*Last updated: 2026-08-23*