---
product_id: 72755942
title: "2 Pack M8 x 40mm (5/16\" x 1-5/8\") Thread Replacement Star Hand Knob Tightening Screw"
brand: "kasteco"
price: "99 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Kasteco"
url: https://www.desertcart.ro/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5
store_origin: RO
region: Romania
---

# M8 x 40mm precision thread Durable metal + plastic build Torx drive for secure tightening 2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw

**Brand:** kasteco
**Price:** 99 Lei
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your grip game with precision & power!

## Quick Answers

- **What is this?** 2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw by kasteco
- **How much does it cost?** 99 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5)

## Best For

- kasteco enthusiasts

## Why This Product

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

## Key Features

- • **Dual-Pack Value:** Two high-quality hand knob screws included—ready to upgrade multiple projects or backups.
- • **Torx Drive System:** Enhanced torque control prevents stripping and ensures reliable, long-lasting fastening.
- • **Versatile Industrial Grade:** Perfect for mechanical, pharmaceutical, and food equipment—trusted by pros.
- • **Robust Metal & Plastic Fusion:** Combines corrosion-resistant alloy steel with ergonomic plastic for strength and comfort.
- • **Precision Engineered M8 Thread:** Exact 8mm diameter with 1.25mm pitch for flawless fit and maximum grip.

## Overview

This 2-pack of M8 x 40mm hand knob tightening screws features fully threaded, corrosion-resistant alloy steel shafts paired with ergonomic plastic knobs. Designed for industrial and mechanical applications, they deliver secure fastening with a Torx drive system, ensuring durability and ease of use across equipment in food, pharmaceutical, and mechanical industries.

## Description

Specifications: Material:Metal + Plastic Color:Silver Tone, Black Package includes: 2 x hand knob tightening screw

Review: Fixed my canopy - This fixed my canopy swing. These are much better quality than the ones the swing came with which were plastic. The size was a fit and priced well! These screws will hold up more than the plastic.
Review: Game changer!! - This was a game changer. I ordered this use on my adjustable pool basketball hoop. It was perfect!!

## Features

- Screw size: M8-1.25 x 40mm (5/16"-24 x 1-5/8")，The thread diameter is 8mm, the pitch is 1.25mm, and the length is 40mm.
- Note: Please check the size before purchasing.
- Package included: 2 x hand knob tightening screw,M8 x 40mm (5/16" x 1-5/8")
- Material: Metal + Plastic
- Widely used for mechanical equipment, instruments, apparatus, food and pharmaceutical industry equipment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07DLRRB3Z |
| Best Sellers Rank | #89,950 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #533 in Cabinet & Furniture Knobs |
| Brand | Kasteco |
| Color | Silver |
| Compatible Groove Diameter | 8 Millimeters |
| Customer Reviews | 4.4 out of 5 stars 949 Reviews |
| Drive System | Torx |
| Exterior Finish | Black Oxide |
| Fastener Size | M8 |
| Fastener Type | Machine Screw |
| Finish Types | Powder Coated |
| Head Style | Flat |
| Head Type | Hex |
| Included Components | Knob, Lock |
| Item Diameter | 8 Millimeters |
| Item Dimensions | 1.52 x 0.87 x 0.04 inches |
| Item Weight | 0.01 Ounces |
| Item dimensions L x W x H | 1.52 x 0.87 x 0.04 inches |
| Manufacturer | KTZZ |
| Material | Plastics and Metals |
| Material Type | Plastics and Metals |
| Metal Type | Alloy Steel |
| Number of Pieces | 2 |
| Point Style | Round Point |
| Screw Head Style | Flat |
| Screw Point Style | Round Point |
| Set Screw Thread Type | Metric |
| Size Name | 40mm |
| Thread Coverage | Fully Threaded |
| Thread Size | M8 |
| UPC | 675663909047 |
| Unit Count | 2 Count |

## Product Details

- **Exterior Finish:** Black Oxide
- **Head Style:** Flat
- **Item dimensions L x W x H:** 1.52 x 0.87 x 0.04 inches
- **Material:** Plastics and Metals
- **Thread Size:** M8

## Images

![2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw - Image 1](https://m.media-amazon.com/images/I/61fCp5TL50L.jpg)

## Questions & Answers

**Q: Does this fit the willow springs swing canopy? 20 or 40mm.**
A: Not sure the thread pitch of your project, M8 equals the bolt diameter, 20mm/40mm is the length of the bolt, 20mm = about 3/4", 40mm = about 1.5". You still need to know what the " pitch of the thread" is. Metric  threads are made in different "pitchs" Ex: 1.00, 1.25 pitch. Doesn't say the pitch of the bolt in the Amazon Offer.  Best to take your bolt to a hardware store and try  different metric nuts on it to find what the "Pitch" is, then look on Amazon to find a match.

**Q: M8x1.0 or M8x1.25?**
A: M8 x 1.25

**Q: Will this fit the DB method exercise machine?**
A: As long as the nut is a M8 x 40 mm

**Q: Do you offer an M6 x 40 in 304 stainless?**
A: no, thank you

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fixed my canopy
*by A***Y on November 5, 2025*

This fixed my canopy swing. These are much better quality than the ones the swing came with which were plastic. The size was a fit and priced well! These screws will hold up more than the plastic.

### ⭐⭐⭐⭐⭐ Game changer!!
*by J***5 on October 27, 2025*

This was a game changer. I ordered this use on my adjustable pool basketball hoop. It was perfect!!

### ⭐⭐⭐⭐⭐ Perfect fit
*by M***L on June 19, 2025*

Thread was perfect for what I needed it for

## Frequently Bought Together

- Kasteco 2 Pack Black 8mm(M8) x 40mm Thread Replacement Star Hand Knob Tightening Screw
- BSWAN 4 Pack M8 x 25mmThread Replacement Star Hand Knob Tightening Screw for Umbrella Base Replacement (4 Pack)
- LifCratms 6 Pieces M6 x 40mm Thread Star Knobs, Plastic Hex Shaped Clamping Knob Handle Hand Tightening Screw Knob for Umbrella Base Replacement

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-05*