The PROLOK CHRS8F-25 Clutch Head Security Screw is a professional-grade, tamper-resistant screw ideal for securing fixtures in public spaces, commercial infrastructure, and safety-critical environments. This 8 gauge (4.2mm) x 19mm self-tapping screw features a one-way clutch head drive for permanent installation and a clean round head profile. Made from 304-grade stainless steel, it ensures lasting corrosion resistance and structural integrity across a wide range of applications including metal, wood, and plastic installations.
What’s Included in the Box
Main Features
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Tamper-Resistant Design: Clutch head allows installation only—removal requires specialized tooling.
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Self-Tapping AB Thread: Efficient penetration and secure hold in metal, wood, and plastic surfaces.
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304 Stainless Steel Material: Excellent resistance to rust and corrosion, ideal for outdoor use.
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Round Head Finish: Offers a neat, tamper-resistant appearance.
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Permanent Fastening Solution: Designed for installations requiring maximum security and durability.
Detailed Specifications
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Part Number: CHRS8F-25
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Gauge: 8 (4.2mm)
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Length: 19mm
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Head Type: Round
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Drive Type: Clutch Head (1-Way)
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Thread Type: AB Type Self Tapping
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Material: 304 Stainless Steel
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Finish: Natural
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Pack Size: 25 Screws
Warranty Information
Covered by a manufacturer’s warranty for defects in materials and workmanship under normal installation and use.
Brand Description
PROLOK delivers precision-engineered tamper-resistant fasteners designed to meet the demands of public safety, commercial installations, and asset protection. Their clutch head security screws are trusted by security contractors, government facilities, and industrial professionals.
SKU / Part Number
CHRS8F-25
Practical Use Scenarios
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Public Installations: Mount signs, fixtures, and access covers where vandalism must be deterred.
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CCTV & Alarm Housing: Secure enclosures in schools, parks, and public buildings.
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Commercial Fitouts: Ensure permanent fastening of display units and access hardware.
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Infrastructure Projects: Fix electrical panels, control boxes, and junctions with anti-tamper protection.
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Outdoor Use: Perfect for coastal or exposed environments thanks to its stainless steel composition.
Excellence for the Australian and New Zealand Market
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Compliant with local safety and quality standards
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Trusted by electricians, integrators, and facility maintenance teams across ANZ
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Made from 304 stainless steel to suit harsh Australian environmental conditions
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Sourced through certified local suppliers and distributors
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Covered by local warranty and technical support
Datasheets / Downloadable Resources
📄 Technical Datasheet – PROLOK Security Screw CHRS8F-25 (PDF
FAQs – CHRS8F-25
Q1: What is the size of the CHRS8F-25 screw?
A1: The CHRS8F-25 is 8 gauge (4.2mm) in diameter and 19mm in length.
Q2: What materials is the CHRS8F-25 suitable for?
A2: It is compatible with metal, plastic, and timber substrates.
Q3: Is the CHRS8F-25 tamper-proof?
A3: Yes, it features a one-way clutch head designed to prevent unauthorized removal.
Q4: Can the CHRS8F-25 be used outdoors?
A4: Yes, it is made from 304 stainless steel, providing excellent corrosion resistance in outdoor conditions.
Q5: How many screws are in a pack?
A5: Each pack contains 25 tamper-resistant screws.
Q6: Is CHRS8F-25 compliant with Australian standards?
A6: Yes, it is manufactured to meet performance and durability expectations for the ANZ market.
Q7: What is the head style of this screw?
A7: The CHRS8F-25 features a round head for a clean, low-profile finish.
Q8: Does CHRS8F-25 require special tools?
A8: Yes, a clutch head driver is needed for installation; removal requires specialized tools not commonly available.
Q9: Can I use CHRS8F-25 for access control panels?
A9: Yes, it's ideal for securing electrical enclosures, access panels, and control boxes.
Q10: Where can I access the datasheet for CHRS8F-25?
A10: The Technical Datasheet – CHRS8F-25 (PDF) is available upon request from authorized PROLOK distributors.
