S-91583A202 3/4"-10 x 6" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

0259FA00129 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
0259FA00129 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Image may differ from product. See technical specification for details.

Part No.
Part No. 0259FA00129
Equivalent to mcmaster :
91583A202

Basic Information

System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 1 1/4"
Head Height 15/32"

Dimensions

Length 6"
Grip Length 4 5/8"

Thread Parameters

Thread Type UNC
Thread Size 3/4"-10
Thread Diameter 0.75"
Thread Spacing Coarse
Thread Length 1 3/8"
Thread Direction Right Hand
Thread Fit Class 2A
Threading Partially Threaded

Tip & Drive Parameters

Drive Style External Hex

Material & Strength

Material Hot-Dipped Galvanized Steel
Hardness Rockwell C19
Fastener Strength Grade/Class Grade A325
Tensile Strength 120000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.2.6, ASTM A325, ASTM F3125
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Exceptional structural integrity with 120,000 psi tensile strength and Grade A325 compliance for reliable performance in demanding applications
  • Superior corrosion protection through hot-dipped galvanized steel construction, extending service life in harsh industrial environments
  • Optimized load distribution with 4 5/8" grip length and partial threading for enhanced joint stability in structural connections
  • Precise installation control featuring Class 2A thread fit and UNC coarse threading for consistent torque performance
  • Robust drive engagement with external hex drive and 1 1/4" head width for secure tool connection during high-torque applications
  • Enhanced durability backed by Rockwell C19 hardness rating, maintaining fastener integrity under repeated stress
  • Regulatory compliance assurance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 standards with RoHS 3 and REACH compliance

Professional Applications & Engineering Value

Engineered for heavy-duty structural fastening, these Grade A325 hex head screws deliver critical performance where failure is not an option. The hot-dipped galvanized steel construction provides superior corrosion resistance, solving the common industrial problem of fastener degradation in exposed environments. The partially threaded design with 1 3/8" thread length and 4 5/8" grip length ensures optimal clamp load distribution, preventing joint loosening in vibration-prone applications. With 3/4"-10 UNC coarse threading and Class 2A thread fit, these screws offer reliable installation in structural steel connections, bridge construction, and heavy machinery assembly. The external hex drive configuration allows for high-torque application using standard industrial tools, making them ideal for construction projects requiring ASTM A325 compliance and consistent 120,000 psi tensile performance.

Specification Summary & Compliance

These 3/4"-10 hex head screws maintain precision Class 2A thread fit with UNC coarse threading standards. Manufacturing complies with ASME B18.2.6 dimensional specifications and ASTM A325/ASTM F3125 material and performance requirements. The fasteners are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental regulatory adherence for industrial and construction applications worldwide.

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