A plain annular washer distributes bolt preload over a wider area, protects soft and finished surfaces, and bridges oversized or slotted holes; Type A (general) and Type B (tighter tolerance).
Conforms to

Spreads clamp load and protects the bearing surface.
A cross-section of stocked configurations. Not exhaustive — diameters, lengths, grades, and finishes extend across the full range on request.
Representative specifications — not exhaustive · NXB-FLW
Match the line to the load, the environment, and the standard it answers to.
Materials
Finishes
Standards
Typical applications
Served industries
Mating parts and adjacent lines engineers reach for alongside this one.
Oversized outer diameter spans thin or slotted material.
M5–M16 · 3/16"–1/2"
Sprung helical ring digs in to resist vibration loosening.
M3–M30 · #6–1-1/4"
Wave or curved form maintains preload through movement.
M3–M24 · #6–1"
The standard six-sided nut for threaded assemblies.
M3–M48 · #4–2"
Grade, material, finish, and standard — matched to your joint and quoted from stock. Tell us the load case and we’ll confirm the line.