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Star Lock Washer

Star shaped locking washer is a fastener used to prevent loosening of bolts or nuts, providing self-locking function through its serrated teeth (internal or external design), enhancing connection reliability.
  • Star Lock Washer

  • PDM

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Features of Star Lock Washer


Internal-externaltooth Star Washers Title:

China Factory starlock washer stainless & 65 Mn Steel lock washer for shaft


The serrations of the Internal Tooth lock washer face towards the center hole, suitable for applications with low torque; The serrations of the External Tooth lock washer face outward, providing higher anti vibration performance; The user term 'Internal external tooth' may refer to such composite designs or double self-locking washers (such as double tooth structures) used for diverse installation scenarios.


Comparison of Material Characteristics

65Mn steel: a high-strength spring steel known for its excellent wear resistance and elasticity, suitable for heavy-duty industrial environments such as heavy machinery or automotive components, but requires surface treatment to prevent corrosion.


Stainless steel: such as 304 or 316 grade, providing excellent corrosion resistance, suitable for humid or chemically exposed environments (such as outdoor equipment or food processing), while maintaining good mechanical strength;


star lock washer stainless


Dimensions(mm)
d(mm) d1(mm) D±0.3mm H±0.2mm S±0.03mm Numbers of Ribs Tensile Strength (N)
1.6mm 1.23-1.46 9.7mm 1.3mm 0.2mm 4 200
2.0mm 1.61-1.84 9.7mm 1.3mm 0.2mm 4 200
2.4mm 2.02-2.25 9.7mm 1.3mm 0.2mm 4 200
3.0mm 2.58-2.81 9.7mm 1.3mm 0.2mm 4 200
3.2mm 2.78-3.01 9.7mm 1.3mm 0.2mm 4 200
4.0mm 3.57-3.80 11.5mm 1.3mm 0.2mm 5 400
4.8mm 4.31-4.53 11.5mm 1.3mm 0.2mm 6 400
5.0mm 4.51-4.74 11.5mm 1.3mm 0.2mm 6 400
6.0mm 5.45-5.70 15.3mm 1.3mm 0.25mm 6 800
6.35mm 5.83-6.08 15.3mm 1.3mm 0.25mm 6 800
7.0mm 6.46-6.72 15.3mm 1.3mm 0.25mm 6 800
8.0mm 7.40-7.66 15.3mm 1.3mm 0.25mm 6 800
9.0mm 8.50-8.75 18.4mm 1.9mm 0.30mm 6 1000
9.5mm 9.00-9.26 18.4mm 1.9mm 0.30mm 6 1000
10.0mm 9.49-9.74 18.4mm 1.9mm 0.30mm 6 1000
11.0mm 10.50-10.76 18.4mm 1.9mm 0.30mm 6 1000
12mm 11.37-11.62 25mm 2.3mm 0.4mm 6 2500
12.7mm 12.10-12.36 25mm 2.3mm 0.4mm 6 2500
13mm 12.38-12.64 25mm 2.3mm 0.4mm 6 2500
14mm 13.40-13.66 28.2mm 2.3mm 0.4mm 6 2500
15mm 14.43-14.68 28.2mm 2.3mm 0.4mm 6 2500
16mm 15.28-15.53 28.2mm 2.3mm 0.4mm 6 2500
17mm 16.42-16.68 28.2mm 2.3mm 0.4mm 6 2500
18mm 17.34-17.62 36.5mm 3.0mm 0.4mm 9 3500
19mm 18.40-18.69 36.5mm 3.0mm 0.4mm 9 3500
20mm 19.30-19.63 36.5mm 3.0mm 0.4mm 9 3500
21mm 20.33-20.61 36.5mm 3.0mm 0.4mm 9 3500
22mm 21.37-21.65 36.5mm 3.0mm 0.4mm 9 3500
23mm 22.34-22.62 38.1mm 3.0mm 0.45mm 9 3500
24mm 23.33-23.66 41.3mm 3.2mm 0.50mm 9 3850
25mm 24.30-24.63 41.3mm 3.2mm 0.50mm 9 3850


Core features of the product

The internal toothed washer (as described in the search results) is embedded in the bolt head through the teeth to reduce the risk of loosening;

Double Self Lock "design combines internal and external teeth to provide a dual locking effect, especially suitable for high vibration scenarios such as mechanical installation.

Compliant with international standards such as ANSI/ASME B 18.21.1, ensuring dimensional tolerances and load capacity, compatible with industrial applications.


Customization and procurement options:

Support low minimum order quantity (MOQ) customization, including size, tooth profile, and surface treatment (such as galvanizing or passivation), with flexible price range for bulk purchase.


65Mn Steel Starlock washer


Applicable scenarios: 

heavy industrial equipment, oil and gas pipelines, automotive assembly, and building structures, prioritizing 65Mn steel to improve fatigue resistance; Stainless steel is used in corrosion sensitive fields such as medical or marine environments.


Selection guide: 

Consider load requirements (65Mn steel for high torque), environmental factors (stainless steel preferred), and refer to supplier certifications (such as ISO) to ensure quality; ‌

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