S-94622A449 1/2"-20 x 4 3/32" AN8-40A Army-Navy Medium-Strength Steel Hex Head Screws
Army-Navy Medium-Strength Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with cadmium plating, extending service life in harsh industrial environments
- Exceptional tensile strength rated at 120,000 psi for reliable performance in high-stress applications
- Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
- External hex drive design provides maximum torque transmission and easy installation with standard tools
- Rockwell C26 hardness maintains structural integrity under heavy mechanical loads
- AN8-40A specification compliance guarantees consistent quality for aerospace and defense applications
- Partially threaded shank allows optimal grip length control for precise joint clamping
Professional Applications & Engineering Value
This 1/2"-20 UNF hex head screw delivers critical performance advantages for aerospace, heavy machinery, and industrial equipment applications. The cadmium-plated steel construction provides essential corrosion protection while maintaining 120,000 psi tensile strength - crucial for structural assemblies subject to dynamic loads. The fine UNF threads with Class 3A precision prevent loosening under vibration, making these external hex drive fasteners ideal for maintenance-critical systems. The partially threaded design combined with substantial 3 5/16" grip length ensures proper clamp load distribution across joined components, solving common issues of joint fatigue and premature failure in demanding operating conditions.
Specification Summary & Compliance
Manufactured to exact AN8-40A specifications with Class 3A thread fit ensuring precision tolerance compliance. Features 1/2"-20 UNF fine threads with right-hand direction and 0.5" thread diameter. The cadmium plating meets industrial corrosion protection standards while the Rockwell C26 hardness and 120,000 psi tensile strength verify mechanical performance reliability. Compliant with aerospace and military specifications for quality-assured deployment in regulated industries.
