S-90357A136 1/4"-20 x 1/4" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 140,000 psi provides reliable load-bearing capacity for demanding applications.
- Precision Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening under vibration.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish.
- Ultra-low socket head profile allows installation in confined spaces where clearance is limited.
- Fully threaded design delivers consistent holding power along the entire screw length.
- High hardness (Rockwell C32) resists wear and deformation, extending service life in high-stress environments.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance for global industrial use.
Professional Applications & Engineering Value
Engineered for precision and durability, these Black-Oxide Alloy Steel Socket Head Cap Screws with 1/4"-20 UNC Class 3A threads address critical needs in machinery assembly, automotive systems, and industrial equipment. The ultra-low profile head and hex drive enable secure installation in tight spaces, reducing the risk of stripping and improving maintenance efficiency. The coarse thread design facilitates quick assembly and disassembly, while the fully threaded construction ensures uniform stress distribution. Ideal for applications requiring high tensile strength and corrosion resistance, these screws provide long-term reliability in harsh operating conditions, minimizing downtime and replacement costs.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for superior engagement. Dimensions include a 1/4"-20 thread size, 1/4" length with a tight tolerance of -0.005" to 0.005", and a 1/8" hex drive. Manufactured from alloy steel with Rockwell C32 hardness, it meets industry specifications for strength and durability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental and safety standards are upheld for industrial use.
