Zinc Plated Steel Internal Tooth Lock Washers

When to use zinc plated internal tooth lock washers

Zinc plated internal tooth washers are the standard, economical choice for vibration resistance and grounding in dry and mild conditions. The inward-facing teeth flatten and bite into the surface and the underside of the bolt head as the fastener is torqued, while the smooth outer edge keeps a clean look for smaller-head fasteners and tight spaces. The zinc plating adds corrosion resistance over bare steel. They are common in electronics, panels, and general assembly. For wet or coastal exposure, step up to a stainless option. Tighten to the correct torque so the teeth seat.

Why choose zinc plated steel internal tooth lock washers

• Economical: cost-effective zinc finish for common jobs.
• Vibration locking: teeth bite the surface to resist loosening.
• Clean look: inward teeth hidden under the bolt head.
• Grounding: teeth bite through coatings for metal-to-metal contact.

Common applications for zinc plated internal tooth lock washers

• Electrical grounding and bonding
• Electronics and control panels
• Smaller-head fasteners and tight spaces
• Indoor and dry general assembly

For wet or coastal use, see 316 stainless internal tooth lock washers, and browse every material on the main lock washers category.

Zinc Plated Steel Internal Tooth Lock Washers FAQ

Are zinc plated internal tooth washers good outdoors?

The zinc plating suits indoor and general dry use. For wet, coastal, or saltwater exposure, choose a stainless internal tooth washer.

Why are internal tooth washers used for grounding?

The teeth bite through coatings and oxide to make solid metal-to-metal contact, which is why they are common at electrical ground points.

What fasteners suit internal tooth washers?

They work best with smaller-head fasteners such as fillister head screws, where the head covers the inner teeth.