S-96738A057 5/16"-18 x 1 1/2" ASME B18.3 Vibration-Resistant Sealing Socket Head Screws

Vibration-Resistant Sealing Socket Head Screws

0047FA00021 Vibration-Resistant Sealing Socket Head Screws
0047FA00021 Vibration-Resistant Sealing Socket Head Screws

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

Part No.
Part No. 0047FA00021
Equivalent to mcmaster :
96738A057

Basic Information

System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 0.469"
Head Height 0.312"
Socket Head Profile Standard

Dimensions

Length 1 1/2"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Thread Diameter 0.3125"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded
Locking Type Thread Locker
Thread Locker Type Nylon Patch
Thread Locker Temperature Range -70° to 250° F

Tip & Drive Parameters

Drive Style Hex
Drive Size 1/4"

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B85
Tensile Strength 100000 psi

Temperature & Environment

Maximum Pressure 1500 psi
O-Ring Material Buna-N Rubber
O-Ring Temperature Range -40° to 225° F
REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3

Installation & Application

For Maximum Hole Diameter 0.332"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Vibration-resistant locking with permanent Nylon Patch thread locker to prevent loosening under dynamic loads
  • Superior corrosion resistance from 18-8 stainless steel construction for extended service life in harsh environments
  • Precision thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in high-vibration applications
  • Exceptional mechanical strength with 100,000 psi tensile strength for heavy-duty industrial applications
  • Dual sealing capability through Buna-N rubber O-rings and thread locker for protection against fluids and contaminants
  • Wide temperature tolerance from -70° to 250°F maintaining performance across extreme operating conditions
  • Standardized compatibility with ASME B18.3 specifications ensuring interchangeability and reliable performance

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these socket head cap screws combine 18-8 stainless steel durability with advanced locking technology to solve critical fastening challenges. The Nylon Patch thread locker provides permanent vibration resistance without requiring secondary locking components, while the Class 3A UNC coarse threads deliver superior engagement in high-stress applications. The inclusion of Buna-N rubber O-rings creates dual sealing protection against fluid ingress and environmental contaminants. These features make these fasteners ideal for heavy machinery, automotive assemblies, and industrial equipment where reliability under extreme pressure (1500 psi maximum) and temperature variations is paramount. The standardized 1/4" hex drive and fully threaded design ensure consistent installation torque and maximum thread engagement throughout the fastener length.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit for precision tolerance in inch system applications. These socket head cap screws feature UNC coarse threads (5/16"-18) with right-hand threading direction and are fully threaded for maximum engagement. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory adherence for global industrial applications.

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