---
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: "HK$134"
currency: HKD
in_stock: true
reviews_count: 8
url: https://www.desertcart.hk/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5
store_origin: HK
region: Hong Kong
---

# 40mm Thread Length M8 Thread Diameter 65mm Total Length 2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw

**Brand:** kasteco
**Price:** HK$134
**Availability:** ✅ In Stock

## Summary

> 🔩 Tighten Up Your Game with Style!

## 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?** HK$134 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/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

- • **🌟 Sleek Design:** Black oxide finish adds a touch of sophistication to your equipment.
- • **📦 Convenient Pack:** Includes two knobs for your immediate needs.
- • **💪 Durable Materials:** Constructed from high-quality metal and plastic for longevity.
- • **🔧 Precision Engineering:** Crafted for optimal performance in mechanical applications.
- • **🛠️ Versatile Compatibility:** Perfect for a range of industries, from food to pharmaceuticals.

## Overview

This 2 Pack of Black 8mm x 40mm Thread Replacement Star Hand Knob Tightening Screws is designed for precision and versatility, making it an essential addition to your toolkit. Crafted from durable metal and plastic, these knobs are perfect for a variety of mechanical applications, ensuring you have the right fit for your equipment. With a sleek black oxide finish, they not only perform well but also look great doing it.

## Description

2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw

## Features

- Package included: 2 x hand knob tightening screw,M8 x 40mm
- Material: Metal + Plastic
- Total Length : 65mm,Head Size : 38.5 x 38.5 x 22mm / 1.5" x 1.5" x 0.8" (L*W*T)
- Thread Length : 40mm;Thread Diameter : M8(8mm)
- Widely used for mechanical equipments, instruments, apparatus, food and pharmaceutical industry equipments.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Plastics and Metals |
| Brand | Kasteco |
| Color | Silver |
| Product Dimensions | 1.57"L x 0.31"W |
| Number of Pieces | 2 |
| Exterior Finish | Black Oxide |
| Item Weight | 0.01 Ounces |
| Unit Count | 2 Count |
| Number of Items | 2 |
| Manufacturer | KTZZ |
| Item Weight | 0.01 ounces |
| Is Discontinued By Manufacturer | No |
| Size | 40 mm |
| Measurement System | metric |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Plastics and Metals
- **Brand:** Kasteco
- **Color:** Silver
- **Product Dimensions:** 1.57"L x 0.31"W
- **Exterior Finish:** Black Oxide

## 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)
![2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw - Image 2](https://m.media-amazon.com/images/I/61K02DdDCnL.jpg)
![2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw - Image 3](https://m.media-amazon.com/images/I/71aZlMT5gEL.jpg)
![2 Pack M8 x 40mm (5/16" x 1-5/8") Thread Replacement Star Hand Knob Tightening Screw - Image 4](https://m.media-amazon.com/images/I/71jVHEl0f6L.jpg)

## Available Options

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

## 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

### ⭐⭐⭐⭐⭐ Work for DB method machine
*by M***E on February 11, 2025*

I got these as replacement screws for a DB method machine and they fit perfectly!

### ⭐⭐⭐⭐⭐ Good price
*by O***A on April 26, 2025*

Good product although I ordered wrong size

### ⭐⭐⭐⭐⭐ Come in pairs. For a reason. Original ones break.
*by T***Y on April 16, 2025*

Good replacement for Garmin side view transducer

## Frequently Bought Together

- Kasteco 2 Pack Black 8mm(M8) x 40mm Thread Replacement Star Hand Knob Tightening Screw
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- 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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**Shop now:** [https://www.desertcart.hk/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5](https://www.desertcart.hk/products/72755942-2-pack-m8-x-40mm-5-16-x-1-5)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-22*