S-92981A030 M4 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish on alloy steel provides reliable protection against rust and wear in demanding industrial environments.
• Superior Load-Bearing Capacity: 140,000 PSI tensile strength and 84,000 PSI minimum shear strength ensure secure, long-lasting connections under high stress.
• Precision Alignment & Reduced Wear: 5mm shoulder diameter with tight tolerances acts as a precise locating dowel, minimizing component misalignment and part wear.
• Consistent High-Strength Performance: Rockwell C32 hardness and alloy steel construction guarantee reliable mechanical properties and resistance to deformation.
• Secure & Efficient Installation: Internal 2.5mm hex drive (socket head) allows for high torque application and prevents stripping in confined spaces.
• Guaranteed Interchangeability: Manufactured to ISO 7379 standard with Class 5g6g thread fit, ensuring perfect compatibility with metric components.
• Safe for Regulated Industries: Compliant with RoHS 3 and REACH regulations, making it suitable for use in environmentally conscious and global markets.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to solve critical alignment and strength challenges in precision industrial applications. The alloy steel core, hardened to Rockwell C32, provides the structural integrity needed to withstand vibrational loosening and high dynamic loads. The integral 5mm shoulder serves as a precise pivot or axle, eliminating the need for separate spacers and bushings, which streamlines assembly and reduces component count. The black oxide finish offers a layer of corrosion resistance without significantly altering the part dimensions, which is crucial for maintaining tight tolerances. Its socket head with a 2.5mm hex drive is ideal for automated assembly and applications where a low-profile, tamper-resistant fastener is required. This combination of a robust metric thread (M4 x 0.7mm) and a precisely machined shoulder makes it an indispensable component in machinery, automation systems, and precision instruments where reliability is non-negotiable.

Specification Summary & Compliance

This shoulder screw features an M4 x 0.7mm coarse metric thread with a Class 5g6g thread fit for standard clearance. The shoulder diameter is 5 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 10 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. The product is manufactured in compliance with the ISO 7379 specification and is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.