20 Pcs M4×10mm Shoulder Bolt, 304 Stainless Steel Thread Hex Socket Shoulder Bolts for Hydraulic Injection Molding Machinery Industries

Headline: Professional M4 Shoulder Bolt Kit – Precision, Durability, and Convenience Upgrade your mechanical projects with this 20-Piece M4 x 10mm Shoulder Bolt Set, crafted from premium 304 Stainless Steel (18-8). Engineered for superior performance, these bolts offer outstanding resistance to corrosion, moisture, and chemical exposure, ensuring longevity in both industrial and marine environments. Key Features & Specifications: Precision Dimensions: Features an M4 thread (0.7mm pitch) with a smooth 5mm diameter shoulder and 10mm shoulder length. Perfect for use as pivot points, axles, or shafts in moving parts. Complete Kit: Includes 20 silver shoulder bolts and a compatible hex wrench for immediate installation. Versatile Application: Ideal for automation equipment, precision instruments, 3D printer upgrades, furniture mechanisms, and structural framing. Storage Solution: Supplied in a durable transparent storage box to keep your fasteners organized and ready for transport. Whether you are maintaining industrial machinery or building a DIY project, this set delivers the stable, high-stress performance you need. Please verify all dimensions (Shoulder Ø 5mm, Length 10mm) before purchase.

• Package Contents: This set includes 20 PCS M4×10 mm silver stainless steel shoulder bolts, and comes with one hex wrench. Packaged in a transparent storage box, it is convenient for organization, transport, and storage. Please carefully check the dimensions before purchase to ensure compatibility with your equipment or assembly.
• Premium Material & Performance: The shoulder bolts are made of 304 stainless steel (18-8), offering excellent corrosion resistance, chemical resistance, wear resistance and durability. The outstanding tensile strength ensures stable and reliable performance under high stress, minimizing risk of deformation or failure. Choosing 304 stainless steel helps reduce degradation caused by rust, oxidation, chemical exposure or moisture — extending service life significantly.
• Dimensions & Specifications: Thread diameter: M4, thread pitch: 0.7 mm; Thread length: 8 mm (≈ 0.315 in); Smooth shoulder (unthreaded shank) diameter: 5 mm (≈ 0.197 in), length: 10 mm (≈ 0.394 in); Bolt head: thickness 3.5 mm (≈ 0.138 in), head outer diameter 9 mm (≈ 0.354 in); Hex socket across-flats: 3 mm (≈ 0.118 in); Overall length (total height): 21.5 mm (≈ 0.846 in)
• Wide Range of Applications: This shoulder bolt is suitable for a variety of industries and applications, such as mechanical manufacturing, automation equipment, precision instruments, vehicle assembly, furniture mechanisms, structural framing, electronics assembly, industrial machinery, marine & shipbuilding, construction equipment, etc. Whether used as a pivot/pivot-pin, shaft/axle, mounting support, structural fastener, or for other mechanical or structural fastening needs — it delivers stable performance.
• Easy Installation & Versatile Use: Designed with an internal hex socket, installable with a standard hex wrench — installation is quick, secure, and suitable for bulk assembly or maintenance. Since a hex wrench is included and the bolts are supplied in a storage box, they are user-friendly for DIY users, repair work, manufacturing, or assembly. Ideal for both professional industrial use and home / small-scale DIY projects.