Secure with confidence using the PROLOK M6 x 20mm Clutch Head Security Machine Screws, engineered for permanent, tamper-resistant fastening in high-security applications. With a one-way clutch head, these screws are simple to install with a standard flat-blade screwdriver but cannot be removed with conventional tools—making them the ideal solution for locations where long-term integrity is essential.
The round head design delivers a smooth, low-profile finish, while the zinc-plated steel construction provides excellent resistance to rust and corrosion. Whether used indoors or outdoors, these machine screws are built to last and ensure maximum security for panels, guards, and enclosures.
This pack includes 25 screws, offering a cost-effective option for industrial, commercial, and public infrastructure installations.
What’s Included
Main Features
-
One-way clutch head offers tamper resistance
-
Smooth, round head for a clean aesthetic finish
-
Zinc plated for durability and corrosion resistance
-
Designed for permanent, maintenance-free fastening
-
Machine thread (M6) ideal for metal and secured applications
-
Suitable for both indoor and outdoor environments
-
Supplied in a pack of 25 for convenience and scalability
Specifications
| Attribute |
Value |
| Brand |
PROLOK |
| Type |
Security Screw |
| Head Style |
Round Head |
| Drive Type |
Clutch Head (One-Way) |
| Thread Type |
Machine Screw |
| Size |
M6 x 20mm |
| Material Finish |
Zinc Plated |
| Quantity |
Pack of 25 |
| Part Number |
CHRM620Z-25 |
Practical Use Scenarios
-
Security panels in public transportation terminals
-
Equipment and machinery guards in industrial environments
-
Tamper-resistant enclosures in commercial infrastructure
-
Safety covers and signage in public-access areas
-
Junction boxes and hardware in residential or urban spaces
Excellence for the Australian and New Zealand Market
-
Built for Harsh Conditions – Corrosion-resistant zinc plating performs in humid, salty, or exposed environments
-
Professional Grade – Trusted by construction, transport, and infrastructure contractors across Australia and New Zealand
-
Tamper-Proof Security – Meets high safety standards for public and commercial installation
-
Bulk Packed for Projects – 25-pack configuration is ideal for larger installations or contractors
-
Authorized Local Distribution – Available through certified PROLOK partners with reliable after-sales support
Downloadable Resources
FAQs – PROLOK CHRM620Z-25
Q1: How do you install the PROLOK CHRM620Z-25?
A1: These screws can be installed with a standard slotted screwdriver. Once tightened, they cannot be easily removed.
Q2: Are the CHRM620Z-25 screws suitable for outdoor environments?
A2: Yes, the zinc-plated finish offers corrosion resistance suitable for both indoor and outdoor applications.
Q3: What type of thread is used in the PROLOK CHRM620Z-25?
A3: The screws use a standard M6 machine thread for secure fastening into metal or threaded fittings.
Q4: What is the quantity per pack of CHRM620Z-25?
A4: Each pack includes 25 security screws.
Q5: Can these screws be reused?
A5: No, the clutch head design is one-way only and intended for permanent installations.
