Keszoox
65Mn Manganese Steel External & Internal Toothed Serrated Lock Washer Gasket M3–M24
65Mn Manganese Steel External & Internal Toothed Serrated Lock Washer Gasket M3–M24
Couldn't load pickup availability
65Mn Manganese Steel External & Internal Toothed Serrated Lock Washer — M3–M24
65Mn spring manganese steel external and internal toothed (serrated) lock washers in metric sizes M3 through M24. The serrated teeth bite into both the fastener bearing surface and the mating surface when the fastener is tightened, creating a mechanical anti-loosening effect that resists vibration-induced loosening. Available in external tooth (DIN 6798A) and internal tooth (DIN 6798J) configurations. 65Mn spring steel provides high hardness and spring-back force for effective locking action.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | 65Mn Spring Manganese Steel |
| Hardness | HRC 38–48 (spring steel) |
| Tooth Type | External toothed (DIN 6798A) / Internal toothed (DIN 6798J) |
| Sizes | M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24 |
| Finish | Zinc-plated (yellow chromate) or black oxide |
| Standard | DIN 6798A (external) / DIN 6798J (internal) |
| Certification | RoHS |
External vs Internal Tooth Selection
| Type | Best For | Notes |
|---|---|---|
| External tooth (DIN 6798A) | Standard bolt/screw heads, large bearing surface | Teeth on outer edge, larger contact area |
| Internal tooth (DIN 6798J) | Small screw heads, countersunk screws, electronics | Teeth on inner edge, compact OD |
Typical Applications
- Electronics Assembly: M3–M5 internal tooth lock washers under PCB mounting screws and panel fasteners in electronics enclosures subject to vibration
- Automotive: M6–M12 external tooth lock washers for automotive body panel, bracket, and accessory mounting fasteners subject to engine and road vibration
- Industrial Machinery: M8–M24 lock washers for industrial machine frame, motor mounting, and conveyor fasteners in high-vibration environments
- Electrical Grounding: External tooth lock washers for electrical grounding connections — the serrated teeth cut through paint and oxide layers to ensure reliable electrical contact
- 3D Printer & CNC: M3–M5 lock washers for 3D printer frame and CNC machine fasteners subject to motor vibration
FAQ
Q: Are serrated lock washers reusable?
A: Serrated lock washers can be reused a limited number of times, but the locking effectiveness decreases with each use as the teeth become flattened. For critical applications, replace with new lock washers each time the fastener is removed and retightened.
Q: Can I use serrated lock washers with stainless steel fasteners?
A: Yes, but note that 65Mn steel lock washers are harder than stainless steel fasteners and may scratch the bearing surface. For stainless steel fasteners, use stainless steel lock washers (A2 or A4 grade) to avoid galvanic corrosion and surface damage.
Package Contents
- 65Mn serrated lock washers (type and size as selected)
- ★Product Description
- ★About us
- ★Custom cable
65Mn Manganese Steel External & Internal Toothed Serrated Lock Washer — M3–M24
65Mn spring manganese steel external and internal toothed (serrated) lock washers in metric sizes M3 through M24. The serrated teeth bite into both the fastener bearing surface and the mating surface when the fastener is tightened, creating a mechanical anti-loosening effect that resists vibration-induced loosening. Available in external tooth (DIN 6798A) and internal tooth (DIN 6798J) configurations. 65Mn spring steel provides high hardness and spring-back force for effective locking action.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | 65Mn Spring Manganese Steel |
| Hardness | HRC 38–48 (spring steel) |
| Tooth Type | External toothed (DIN 6798A) / Internal toothed (DIN 6798J) |
| Sizes | M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24 |
| Finish | Zinc-plated (yellow chromate) or black oxide |
| Standard | DIN 6798A (external) / DIN 6798J (internal) |
| Certification | RoHS |
External vs Internal Tooth Selection
| Type | Best For | Notes |
|---|---|---|
| External tooth (DIN 6798A) | Standard bolt/screw heads, large bearing surface | Teeth on outer edge, larger contact area |
| Internal tooth (DIN 6798J) | Small screw heads, countersunk screws, electronics | Teeth on inner edge, compact OD |
Typical Applications
- Electronics Assembly: M3–M5 internal tooth lock washers under PCB mounting screws and panel fasteners in electronics enclosures subject to vibration
- Automotive: M6–M12 external tooth lock washers for automotive body panel, bracket, and accessory mounting fasteners subject to engine and road vibration
- Industrial Machinery: M8–M24 lock washers for industrial machine frame, motor mounting, and conveyor fasteners in high-vibration environments
- Electrical Grounding: External tooth lock washers for electrical grounding connections — the serrated teeth cut through paint and oxide layers to ensure reliable electrical contact
- 3D Printer & CNC: M3–M5 lock washers for 3D printer frame and CNC machine fasteners subject to motor vibration
FAQ
Q: Are serrated lock washers reusable?
A: Serrated lock washers can be reused a limited number of times, but the locking effectiveness decreases with each use as the teeth become flattened. For critical applications, replace with new lock washers each time the fastener is removed and retightened.
Q: Can I use serrated lock washers with stainless steel fasteners?
A: Yes, but note that 65Mn steel lock washers are harder than stainless steel fasteners and may scratch the bearing surface. For stainless steel fasteners, use stainless steel lock washers (A2 or A4 grade) to avoid galvanic corrosion and surface damage.
Package Contents
- 65Mn serrated lock washers (type and size as selected)
- ♥Hear From Our Happy Customers
- ♥Verified Buyer Reviews
- ♥Trusted by Professionals and Engineers
