We carry all sizes of Penta Bolts
with many types of materials. Call us for details and delivery.
@ GNC Fasteners, California.
What is Penta Bolt?
From GNC Fasteners, California
Penta bolts, also known as pentagon or penta head bolts, are a type of tamper-resistant fastener with a unique five-sided (pentagonal) head. These bolts are specially designed for secure installations that prevent unauthorized access and are commonly used in public infrastructure like manhole covers, waterworks, valve boxes, electrical enclosures, and other high-security outdoor environments. Their pentagonal shape is incompatible with standard tools, making them difficult to remove without a matching penta-specific wrench, which is not widely available in typical hardware stores.
Constructed from materials like 18-8 stainless steel, penta bolts are corrosion-resistant, enhancing their durability in harsh weather and reducing maintenance needs over time. Their design also includes a tight tolerance between the bit and screw, offering a “stick-fit” that facilitates easier handling and increased stability during installation. This feature makes them popular in municipal applications, where tamper resistance and installation efficiency are crucial.
Penta bolts are used primarily in settings where security and tamper resistance are essential. Due to their unique five-sided head design, these bolts are difficult to remove without specialized tools, making them ideal for installations where unauthorized access or tampering needs to be prevented.
Common applications include:
Public Infrastructure and Utility Covers: Penta bolts are widely used in securing manhole covers, water meters, valve boxes, and ground vaults. The design protects city infrastructure from tampering and ensures only authorized personnel can access these systems.
Electrical and Telecommunication Enclosures: Many municipalities use penta bolts for securing electrical junction boxes, meter boxes, and telecom enclosures, reducing the risk of unauthorized access to sensitive equipment
High-Security Buildings and Facilities: Some government or municipal buildings use penta bolts for exterior fixtures and panels that require extra security, ensuring that critical components are only accessible by authorized workers.
Outdoor and Harsh Environments: Made from corrosion-resistant materials like stainless steel, penta bolts are also suitable for outdoor applications where they need to withstand harsh weather and environmental exposure
By using penta bolts, agencies can prevent unauthorized removal or tampering, as the necessary tools are typically not available in standard retail hardware outlets.
Benefits of Penta Bolts
By GNC Fasteners, California
Penta bolts offer several unique benefits, especially in applications requiring high security and durability. Here are some of their key advantages:
Tamper Resistance: The five-sided (pentagonal) head design makes penta bolts incompatible with common tools like wrenches or screwdrivers, reducing the risk of unauthorized removal. This tamper-resistant feature is especially useful in securing public infrastructure and sensitive equipment, ensuring only personnel with specialized tools can access these installations
Enhanced Durability: Typically made from materials like 18-8 stainless steel or zinc-plated finishes, penta bolts offer high corrosion resistance. This durability is essential for outdoor installations, as they can withstand harsh weather conditions and environmental wear, reducing maintenance needs over time
Safety in Public Areas: Penta bolts are often recessed in applications like manhole covers, which helps prevent them from becoming tripping hazards. The unique head design also helps prevent dirt and debris from clogging the bolt head, maintaining accessibility for authorized personnel while minimizing obstruction risks in high-traffic areas
Reduced Theft and Vandalism: Since standard tools cannot remove penta bolts, they serve as an effective deterrent against theft and vandalism. This benefit is crucial for applications in public spaces where theft or tampering could cause service disruptions or safety hazards, such as in water meters or valve boxes
Precision Fit and Stability: The penta design allows for a “stick-fit” with its corresponding tool, offering tight tolerance and ensuring the bolt remains attached to the tool without slipping. This feature simplifies installation, improves productivity, and enhances stability during assembly
Overall, penta bolts are ideal for applications that demand a secure, durable, and low-maintenance fastening solution. Their unique design makes them indispensable in public infrastructure and other high-security environments.
Sizes of Penta Bolt
@ GNC Fasteners
Penta bolts are available in a range of sizes to accommodate different applications, especially those in public infrastructure and secure installations. Here’s a breakdown of typical sizes and specifications:
-
Diameter: Standard diameters range from 1/4 inch to 5/8 inch, with larger sizes available for custom orders. Penta bolts for more heavy-duty applications can also be made in diameters up to 1 inch
-
Length: Lengths of penta bolts vary by application, with commonly available options typically between 1 to 4 inches. However, longer lengths can be custom-manufactured based on project requirements.
-
Threading: Most penta bolts feature coarse threading, which provides a firm grip for materials like concrete, wood, and metal, making them suitable for outdoor or utility applications
-
Head Size: The pentagon head itself also varies in size, usually scaled with the diameter and intended security level, ensuring they maintain their tamper-resistant properties while providing ease of installation and durability.
For specific projects or industry requirements, manufacturers often offer customization options.