Special Fastener Series: Brass Nuts and Lock Nuts

Beyond regular carbon and stainless bolts and nuts, many applications need special materials or functions—brass nuts for conductivity and corrosion, nylon insert lock nuts for loosening resistance, flange nuts for even load distribution. We supply a special nut series across common sizes, matched to real applications.

Special nuts differ by function and material; selection follows environment, loading and assembly to realize their specific value.

Brass Nut Series

Brass nuts, mainly yellow brass and bronze, offer good conductivity, corrosion resistance and non-magnetic properties for electrical connections, grounding and magnetic-sensitive spots. Surfaces come nickel-plated or natural per conductivity and appearance.

Brass is mechanically weaker than steel—check actual loading and avoid over-torque. Common sizes cover M3-M12 and popular imperial, with custom options per drawing.

Nylon Insert Lock Nuts

Nylon insert nuts carry a nylon collar that grips the threads, creating prevailing-torque locking—reliable under vibration and removable repeatedly for maintenance. The collar keeps stable locking torque across multiple cycles.

Temperature limits follow the nylon material; confirm range for high-heat sites. Assembly torque runs slightly higher than plain nuts—tighten per spec.

Flange Nuts and Anti-Rotation

Flange nuts integrate a bearing face that spreads load over more area—good for slotted holes and thin sheets, often replacing washers. Serrated flanges add locking for vibration.

Anti-rotation also includes all-metal lock nuts (collared) with deformed threads—suited to high temperature or where nylon does not fit. Choose by temperature and service frequency.

Materials and Finishes

Special nuts use carbon steel (zinc, nickel, dacromet), stainless and brass alloys. High corrosion calls for stainless or dacromet, conductivity for brass, general indoor for zinc carbon steel.

High-strength applications match nut class to bolt class to avoid premature nut failure; finishes match bolts to reduce galvanic corrosion.

Supply and Selection Support

We offer spec lists and samples for special nuts, full sets with bolts and washers, and selection advice per application. Common sizes in stock, special specs to drawing.

Support covers locking comparison, material and corrosion choice, and torque references—helping design and assembly settle on the right special nut.

Applications and Selection Advice

Brass nuts serve electrical connections, grounding terminals and non-magnetic sites—check conductivity needs and assembly torque; nylon insert lock nuts suit vibration and serviceable spots like motors, fans and covers; flange nuts fit slotted holes and thin sheets, spreading load with fewer washers; all-metal lock nuts serve high temperatures.

Define service temperature, vibration level, service frequency and corrosion needs first, then choose structure and material by function. We provide samples and torque references to validate locking and assembly during sampling.

Special nuts differ in function and material; selecting by application with proper validation realizes their specific value in locking, conductivity and corrosion.