S-91223A336 1/4"-20 x 1 3/4" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00049 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00049 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00049
Equivalent to mcmaster :
91223A336

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 1/2"
Head Diameter Tolerance -0.005" to 0.005"
Head Height 5/64"
Socket Head Profile Ultra-Low

Dimensions

Length 1 3/4"
Shoulder Diameter 5/16"
Shoulder Length 5/64"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/8"

Material & Strength

Material 316 Stainless Steel
Hardness Rockwell B70
Tensile Strength 70000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction.
  • High tensile strength of 70,000 psi ensures reliable, long-lasting fastening under significant load and stress.
  • Ultra-low profile socket head design allows for installation in tight spaces and provides a sleek, flush finish.
  • Precise Class 2A thread fit guarantees smooth assembly and consistent, secure engagement with mating components.
  • 1/4"-20 UNC coarse thread enables faster installation and improved performance in a wider range of materials.
  • Full-threaded design along the entire 1 3/4" length offers maximum grip and adjustment flexibility.
  • Compliance with RoHS 3 and REACH ensures the product meets stringent international environmental and safety regulations.

Professional Applications & Engineering Value

This 316 stainless steel socket head cap screw is engineered to solve critical challenges in demanding industrial settings. Its exceptional corrosion resistance makes it ideal for applications exposed to chemicals, moisture, and marine environments, preventing fastener failure and reducing maintenance costs. The ultra-low profile head and internal hex drive are crucial for machinery and assemblies where space is constrained, providing a secure, tamper-resistant fastening solution without protruding components. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures that these socket head cap screws maintain clamp load and integrity in high-vibration equipment, from automotive and aerospace subsystems to food processing and chemical plant machinery. The 1/4"-20 UNC coarse thread and Class 2A fit facilitate quick, reliable installation, enhancing production line efficiency.

Specification Summary & Compliance

This fastener adheres to the inch system with a 1/4"-20 UNC thread of Class 2A fit, ensuring precise dimensional accuracy and interchangeability. It is manufactured from 316 Stainless Steel and is fully threaded with a right-hand direction and coarse spacing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for hazardous substances.

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