S-94912A470 1/4"-20 x 1 1/4" ASTM F837 Stainless Steel Socket Head Screws with Split Lock Washer

Stainless Steel Socket Head Screws with Split Lock Washer

0041FA00018 Stainless Steel Socket Head Screws with Split Lock Washer
0041FA00018 Stainless Steel Socket Head Screws with Split Lock Washer

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

Part No.
Part No. 0041FA00018
Equivalent to mcmaster :
94912A470

Basic Information

Screw Features With Washer
System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 3/8"
Head Height 1/4"
Socket Head Profile Standard

Dimensions

Length 1 1/4"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded
Locking Type Lock Washer

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/16"

Washer & Nut

Washer Type Split Lock
Washer Material 18-8 Stainless Steel
Washer OD 0.354"
Washer Thickness 1/16"

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B70
Tensile Strength 70000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASTM F837
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
  • Exceptional tensile strength rated at 70,000 PSI, ensuring dependable performance under high-stress conditions.
  • Secure vibration resistance provided by the integrated split lock washer, preventing loosening in dynamic applications.
  • Precise Class 3A thread fit for tighter tolerances and improved assembly accuracy in demanding machinery.
  • Easy installation and removal with a standard hex drive (3/16"), allowing for efficient maintenance and reduced downtime.
  • Full thread engagement along the 1-1/4" length, offering consistent clamping force and versatile fastening options.
  • Compliance with industry standards including ASTM F837, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 18-8 stainless steel socket head cap screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion degradation. The inclusion of a split lock washer enhances joint integrity by maintaining clamp load under cyclic stresses, making it ideal for heavy machinery, automotive assemblies, and precision equipment. Its UNC coarse thread and Class 3A fit provide rapid assembly with minimal risk of cross-threading, while the fully threaded design ensures uniform stress distribution. The corrosion-resistant material and high tensile strength (70,000 PSI) deliver durability in demanding applications, from manufacturing to marine environments, reducing maintenance frequency and lifecycle costs.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a Class 3A fit for precise dimensional accuracy. It complies with ASTM F837 specifications for consistency and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld in industrial use.

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