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1/2"-20x3-1/4" Grade 5 Hex Head Cap Screw

Part Number: 1/220X31/4G5PLAIN
BreakpointPriceDiscount
1 - 24$1.01440%
25 - 99$0.836917.5%
100 - 174$0.743926.67%
175 - 349$0.669534%
350 - 699$0.608640%
700+$0.557945%
1.0144
$1.01
QTY:
  

PRODUCT DETAILS

1/2"-20x3-1/4" Grade 5 Partial Thread Hex Head Cap Screw with Plain Plating
SPECS
  • Size: 1/2"-20
  • Length: 3-1/4"
  • Plating: Plain Finish
  • Thread: UNF
  • Grade: 5
  • Thread Amount: 1-1/4"
Grade 5 Hex Head Cap Screws with Plain Finish
 
Grade 5 Hex Head Cap Screws are essential fasteners widely used in manufacturing, repair, and construction industries worldwide. These versatile components are designed to securely join two or more parts in assemblies that may require future maintenance or disassembly.
 
Technical Specifications:
 
Material: Medium carbon steel
Heat Treatment: Quenched and tempered
Proof Load: 1/4" thru 1" diameter 85,000 PSI, 1" thru 1-1/2" diameter 74,000 PSI
Minimum Tensile Strength: 1/4" thru 1" diameter 120,000 PSI, 1" thru 1-1/2" diameter 105,000PSI
Head Marking: Three radial lines spaced 120 degrees apart
Finish: Plain (uncoated)

Key Features:
  • Hex Head Design: The six-sided head provides a substantial bearing and wrenching surface, offering superior torque application compared to socket products or machine screws.
  • Washer Face: A precision bearing surface under the head ensures even load distribution and improved clamping force.
  • Chamfered Point: Facilitates easier engagement with nuts or pre-tapped holes, enhancing assembly efficiency.
  • Tight Manufacturing Tolerances: Grade 5 cap screws are produced to more precise specifications than standard hex bolts, ensuring consistent performance and fit.
  • Mid-Range Strength: With a minimum tensile strength of 120,000 PSI, Grade 5 screws offer a balanced combination of strength and cost-effectiveness for many applications. 
Applications:
Grade 5 Hex Head Cap Screws are ideal for heavy-duty applications in various industries, including:
  • Automotive assembly and repair
  • Industrial machinery construction
  • Agricultural equipment manufacturing
  • General construction projects
  • Structural steel fabrication
The plain finish option is particularly suitable for indoor applications or environments where corrosion resistance is not a primary concern. This finish allows for cost savings while maintaining the screw's structural integrity and performance characteristics. 

Advantages: 
  • Durability: Heat treatment processes ensure high strength and resistance to fatigue.
  • Versatility: Suitable for a wide range of assembly and fastening tasks.
  • Easy Identification: The three-line head marking allows for quick grade verification.
  • Cost-Effective: Offers a balance between performance and affordability.
  • Standardization: Manufactured to meet ASME B18.2.1 and SAE J429 standards, ensuring compatibility and reliability.
When selecting Grade 5 Hex Head Cap Screws with Plain Finish, consider factors such as required tensile strength, environmental conditions, and specific application needs. These fasteners provide a robust and economical solution for many industrial and construction applications where medium-strength fasteners are required.