Flush countersunk profile with anti-vibration locking teeth; materials: 304/316/65Mn.
Countersunk Lock Washers are designed for flush-mounted bolted connections where the screw head needs to sit below or level with the work surface. The countersunk profile matches flat or oval-head screws, while the locking teeth provide mechanical resistance to loosening caused by vibration and dynamic loads.
Stamping parts manufacturer
Owned factory
Stamping capacity · 120 presses up to 450 T
Quotation response
No dimensions are published until the company chart is confirmed; custom ID/OD and thickness are available (up to 80 mm OD, per confirmed drawing).
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Countersunk lock washers use a countersunk profile so flat or oval-head screws sit flush with the work surface, while the locking teeth keep the joint tight and prevent loosening under vibration.
The washers are produced by progressive die stamping and machining under an IATF 16949 quality system, with the countersink angle matched to the screw head type.
As a China countersunk lock washer manufacturer, Ningbo Yinzhou Zhenhua supplies 65Mn spring steel and AISI 304/316 stainless steel, for automotive chassis, industrial motors and pumps, steel structures, railway and renewable-energy applications where a flush finish and vibration-proof locking matter.
Countersunk lock washers are used where a flush screw installation and additional resistance to loosening are required.
A This washer combines a flush countersunk profile with locking teeth that bite mechanically; a spring washer relies on elastic deformation that can relax over time. Confirm interchangeability per application and countersink angle.
A Face the countersunk side toward the screw head and let the locking teeth bite into the bearing surface; tighten to the specified torque. For soft substrates, add a flat washer underneath to protect the surface.
A Reuse is acceptable for non-critical static joints; replace the washer when the teeth are visibly flattened, deformed or corroded.
A Materials are AISI 304/316 stainless and 65Mn spring steel; stainless plain / polished / passivated, 65Mn with blue-white zinc, black oxide / phosphating, or eco-friendly Dacromet on request. Selection depends on the service environment and is confirmed at inquiry.
A AISI 304 standard sizes are generally kept in stock and can be prioritized; other materials or non-standard sizes are produced within approx. 15–30 days, confirmed at inquiry.
send your size, quantity and drawing for countersunk lock washers, and we will reply after confirming specifications and lead time.
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