Feature

●Material: carbon steel
●Color: Black
●Surface treatment: black oxidation
●Number of product packages:100pcs

[M8-20pcs Hex nuts]

[M4-100pcs Spring Washers]

[M3-100pcs Flat Washers]

Description

★ These lock washers resist loosening caused by vibration and corrosion. Lock washers work by applying a spring force against the nut or bolt head.
★ Washers surface are smooth can reduces friction between the fasteners, preventing isolates,
★ preventing loosening and dispersion pressure.