Alloy Steel Black Oxide Extended Shoulder Screw ISO 7379

Available in a wide range of sizes and shoulder lengths, extended shoulder screws are commonly manufactured from alloy steel, carbon steel, stainless steel 304, and stainless steel 316 to meet varying strength and environmental requirements. Surface treatments such as **black oxide, zinc plating, nickel plating, passivation, Dacromet, and Geomet can be applied to improve corrosion resistance and service life. Products may be supplied according to ISO 7379 dimensions or produced to custom specifications based on customer drawings.

The extended shoulder design helps maintain precise spacing, reduces wear on mating parts, and ensures smooth, consistent operation under repeated motion. These fasteners are widely used in industrial machinery, automation systems, packaging equipment, textile machinery, conveyor systems, molds, and custom mechanical devices. Combining accurate positioning with excellent load-carrying capability, extended shoulder screws provide an efficient solution for applications requiring both secure fastening and extended guidance or support along the shoulder section.