---
product_id: 313306661
title: "FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count"
brand: "fastenmaster"
price: "R8856"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/313306661-fastenmaster-fmhlgm412-250-headlok-heavy-duty-flathead-fastener-4-1
store_origin: ZA
region: South Africa
---

# 250-count bulk pack with free Spider Driver bit 4.5-inch heavy-duty length Stronger shear values than 3/8" lag screws FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count

**Brand:** fastenmaster
**Price:** R8856
**Availability:** ✅ In Stock

## Summary

> 🔩 Fasten smarter, not harder—lock in strength and speed with HeadLOK!

## Quick Answers

- **What is this?** FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count by fastenmaster
- **How much does it cost?** R8856 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/313306661-fastenmaster-fmhlgm412-250-headlok-heavy-duty-flathead-fastener-4-1)

## Best For

- fastenmaster enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Go:** Includes a free Spider Driver bit in every package—everything you need to get started immediately.
- • **Built to Last:** Corrosion-resistant finish ensures your work stands the test of time, ACQ approved for treated wood.
- • **Cam-Out? Not Here!:** Patented Spider Drive design virtually eliminates cam-out for flawless fastening every time.
- • **Unmatched Strength:** Nationally code-compliant with shear values surpassing standard lag screws for ultimate durability.
- • **Effortless Installation:** No predrilling needed—zips right in to save you time on every project.

## Overview

The FastenMaster FMHLGM412-250 HeadLOK is a 4.5-inch heavy-duty flathead fastener designed for professional-grade wood projects. It offers superior shear strength exceeding 3/8-inch lag screws, requires no predrilling, and features a patented Spider Drive to prevent cam-out. With corrosion resistance approved for treated wood and a free Spider Driver bit included, this 250-count pack delivers reliable, efficient fastening for long-lasting results.

## Description

FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count

## Features

- Nationally code compliant stronger design shear values than 3/8 inch lag screws
- No predrilling--zips right in
- Patented Spider Drive virtually eliminates cam-out
- corrosion resistance for the life of the project; ACQ approved
- Free Spider Driver bit in every package

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | FASTENMASTER |
| Part number | OMG - 5667704 |
| Item Weight | 4.54 Kilograms |
| Product Dimensions | 24.13 x 19.05 x 25.4 cm; 4.54 kg |
| Item model number | FMHLGM412-250 |
| Size | 4 Inch - 1/2 Inch |
| Color | Black |
| Finish | black |
| Material | Other |
| Item Package Quantity | 1 |
| Number Of Pieces | 250 |
| Head Style | Flat |
| Measurement System | Imperial |
| Specific uses | wood |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Other
- **Head style:** Flat
- **Item dimensions L x W x H:** 24.1 x 19.1 x 25.4 centimeters
- **Exterior finish:** Epoxy
- **Point style:** Self-Drill Point

## Images

![FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count - Image 1](https://m.media-amazon.com/images/I/514x3m5GZqL.jpg)
![FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count - Image 2](https://m.media-amazon.com/images/I/61zZXR198tL.jpg)
![FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count - Image 3](https://m.media-amazon.com/images/I/71kUrFrXYKL.jpg)
![FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count - Image 4](https://m.media-amazon.com/images/I/61h9xz4ldDL.jpg)
![FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count - Image 5](https://m.media-amazon.com/images/I/61JmLPjc06L.jpg)

## Available Options

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

## Questions & Answers

**Q: We need 10” do you sell those**
A: Amazon:  I'm supposed to know your products?

**Q: What is the sheer force and bending psi specs for these?**
A: Per their spec sheet, the bending yield is 187,300 PSI and the allowable faster strength 1215 lbf Tensile and 965 lbf Shear

**Q: why do i have to buy such a large quantity ?? why can't i get the 8 inch flathead in a 50 count >???**
A: I always have big projects going. I am going to use a lot of them.

**Q: I have to put three 2x6 pressure treated together for a main beam in a crawl space under a house, will these fastners work or do you sugest another?**
A: You will only need 3" deck screws or drywall screws to put the beam together.  I would not use the head lock screw.  Probably will be 3 2x6 put together.  Stager your joints on the beam if your 2x6's are not long enough to span from baring to baring.

## Frequently Bought Together

- FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count,Black
- FastenMaster OMG-FMHLGM278-500, 2-7/8"
- EAB Tool 96000 Spider Driver Bits, 3-Pack

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**Shop now:** [https://www.desertcart.co.za/products/313306661-fastenmaster-fmhlgm412-250-headlok-heavy-duty-flathead-fastener-4-1](https://www.desertcart.co.za/products/313306661-fastenmaster-fmhlgm412-250-headlok-heavy-duty-flathead-fastener-4-1)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-11*