S-91223A224 5/16"-18 x 3/4" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00012 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00012 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00012
Equivalent to mcmaster :
91223A224

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 37/64"
Head Diameter Tolerance -0.005" to 0.005"
Head Height 7/64"
Socket Head Profile Ultra-Low

Dimensions

Length 3/4"
Shoulder Diameter 3/8"
Shoulder Length 7/64"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Thread Diameter 0.3125"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 5/32"

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 with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
  • High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration, reducing failure risks.
  • Ultra-low socket head profile allows for installation in tight spaces where clearance is limited, improving design flexibility.
  • Precision Class 2A thread fit with 5/16"-18 UNC coarse threads enables easy assembly and secure fastening in various materials.
  • Durable Rockwell B70 hardness provides excellent wear resistance and long-term durability in demanding applications.
  • Fully threaded design offers consistent grip along the entire 3/4" length, enhancing load distribution and stability.
  • Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global standards for restricted substances.

Professional Applications & Engineering Value

Engineered for industrial and mechanical systems, these 316 stainless steel socket head cap screws address common challenges like corrosion, space constraints, and high-stress conditions. The ultra-low profile head and 5/16"-18 UNC coarse threads facilitate quick installation in confined areas, while the Class 2A thread fit ensures consistent engagement without cross-threading. Ideal for machinery, automotive, and marine applications, they provide reliable fastening in corrosive environments, reducing maintenance needs and extending equipment lifespan. The combination of 70,000 psi tensile strength and hex drive design allows for secure torque application, making them a top choice for engineers seeking durability and efficiency.

Specification Summary & Compliance

This socket head cap screw features precise dimensions, including a head diameter of 37/64" with a tolerance of -0.005" to 0.005", and a length of 3/4". Thread specifications adhere to UNC standards with Class 2A fit for accurate assembly. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety regulations, ensuring suitability for global industrial use.

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