5/16" X 4" ONE WAY SCREW STEEL FINISH BLACK
- Buy 20 or more $0.44 Save 10%
- Buy 50 or more $0.39 Save 20%
- Buy 100 or more $0.29 Save 41%
| Weight | 0.060625 |
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5/16" X 4" ONE WAY SCREW STEEL FINISH BLACK
This 5/16" x 4" One Way Screw is a specialized tamper-resistant fastener designed for permanent or semi-permanent installations. Its unique slotted head is engineered to be driven in one direction only, preventing unauthorized removal and securing assets in public or commercial environments.
- Tamper-Resistant Head Design
- Industrial-Grade Steel
- Black Oxide for Mild Corrosion Resistance
- Security & Public Fixtures
Manufactured from durable carbon steel, this one-way screw provides a reliable fastening solution for security-sensitive applications. The black finish, typically a black oxide coating, offers a clean aesthetic and a moderate level of corrosion resistance suitable for indoor or sheltered outdoor use. The screw's design adheres to common industrial fastener standards for dimensional accuracy, ensuring consistent performance in commercial and MRO projects where preventing tampering is a primary concern.
Ideal for applications where fixtures must be protected from vandalism or theft, these one-way screws are commonly used to install signs, public bathroom partitions, license plate frames, and protective casings. The drive system allows for easy installation with a standard flat-blade screwdriver, but its sloped faces prevent the driver from gaining purchase for counter-clockwise rotation. This makes it a cost-effective security hardware solution for fabricators, installers, and maintenance professionals in the Los Angeles area.
Specifications
- Material: Carbon Steel
- Standards: Conforms to general industrial fastener dimensional standards (e.g., ASME B18.6.3)
- Strength/Tensile: Standard duty, designed for shear and security, not high-tensile applications.
- Dimensions: Diameter: 5/16 inch, Length: 4 inches
- Finish: Black Oxide
- Certifications: Material Test Reports (MTRs) available upon request.
Applications
- Public Fixtures: Securing park benches, restroom partitions, and public signage.
- Security & Loss Prevention: Installing protective covers, lock plates, and anti-theft devices in retail or commercial spaces.
- Automotive: Attaching license plates, custom grilles, and accessories to deter theft.
- Fabrication: Permanent assembly of enclosures, panels, and frames where service access is restricted.
Target Users
This product is essential for property managers, MRO teams, institutional maintenance staff, and fabricators who require a simple yet effective tamper-proof fastening solution.
Finish Options
This screw features a standard Black Oxide finish for a discrete appearance and mild corrosion resistance. For applications requiring superior weather protection, other tamper-resistant fasteners are available in materials like stainless steel or with zinc plating. Contact our Los Angeles sales team for alternatives.
How to Measure
To specify a one-way screw, you need the major diameter and the length. The diameter is the screw's nominal thickness (e.g., 5/16"). The length is measured from the bearing surface (the flat underside of the head) to the tip of the screw.
Example: One Way Screw, 5/16" (Diameter) x 4" (Length), Steel, Black Finish
Order Checklist
- Product name and required dimensions
- Grade/material specification and quantity
- Cutting instructions (if applicable)
- Surface finish requirements
- Certifications required (Mill Test Report - MTR)
- Special handling or delivery requirements
Quick Facts
- Product
- 5/16" X 4" ONE WAY SCREW STEEL FINISH BLACK
- Material
- Carbon Steel
- Standards
- ASME/SAE Industrial Standards
- Key Properties
- Tamper-resistant one-way drive, steel construction, black oxide finish for light-duty security.
- Primary Applications
- Public Fixtures, Security, Loss Prevention, Fabrication
- Location
- Los Angeles warehouse - Same-day pickup available
Available Sizes
One Way Screws are stocked in a variety of common diameters and lengths at our Los Angeles warehouse. Bulk quantities are available for commercial and MRO projects.
Custom sizes and cutting services are available.
Contact for Sizing-
5/16" X 4" ONE WAY SCREW STEEL FINISH BLACK$0.49
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