S-91223A231 3/8"-16 x 1" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

316 Stainless Steel Ultra-Low-Profile Socket Head Screws

0031FA00018 316 Stainless Steel Ultra-Low-Profile Socket Head Screws
0031FA00018 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

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

Part No.
Part No. 0031FA00018
Equivalent to mcmaster :
91223A231

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 3/4"
Head Diameter Tolerance -0.005" to 0.005"
Head Height 1/8"
Socket Head Profile Ultra-Low

Dimensions

Length 1"
Shoulder Diameter 7/16"
Shoulder Length 1/8"

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
Thread Diameter 0.375"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/16"

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 marine and chemical environments
  • Enhanced space efficiency through ultra-low socket head profile, allowing installation in tight clearance applications
  • Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent assembly and vibration resistance
  • High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding mechanical applications
  • Secure hex drive operation with 3/16" drive size providing positive torque transmission and reduced cam-out risk
  • Full regulatory compliance meeting RoHS 3 and REACH environmental standards for global industrial use
  • Complete thread coverage with fully threaded design offering maximum grip length and adjustment flexibility

Professional Applications & Engineering Value

This 316 stainless steel socket head cap screw delivers exceptional engineering value in corrosive and high-stress environments. The ultra-low profile design solves space constraints in precision equipment, while the UNC coarse threads provide rapid assembly and superior vibration resistance in machinery, marine hardware, and chemical processing systems. With 70,000 psi tensile strength and Rockwell B70 hardness, it maintains structural integrity under heavy loads and thermal cycling. The hex drive system ensures reliable torque application in automated assembly lines, making it ideal for OEM manufacturing and maintenance applications requiring corrosion-resistant fasteners with consistent performance.

Specification Summary & Compliance

This socket head cap screw maintains precision Class 2A thread fit with UNC coarse thread profile (3/8"-16) and dimensional tolerances including head diameter tolerance of -0.005" to 0.005". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. The fully threaded design with right-hand orientation provides standardized installation compatibility across industrial applications.

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