For Enduring Two-fold self-locking washers to function properly, the mounting hole diameter must be larger than the washer's outer diameter. If the mounting hole diameter is too small, the edge of the hole will press against the outer edge of the washer during tightening. This external force directly hinders the micro-rotation required for the washer to operate and also inhibits the normal bending of the locking tongue. These micro-rotation and bending are the core mechanisms that enable the washer to achieve its self-locking effect. If these two movements are restricted, the washer's self-locking function will be completely ineffective.
Mon |
Φ24 |
Φ27 |
Φ30 |
Φ33 |
Φ36 |
Φ39 |
Φ42 |
Φ45 |
Φ48 |
Φ52 |
Φ56 |
d max | 25.5 | 28.6 | 31.6 | 34.6 | 37.6 | 40.6 | 43.5 | 46.7 | 50.1 | 54.1 | 59.6 |
d min | 25.1 | 28.2 | 31.2 | 34.2 | 37.2 | 40.2 | 43 | 46.2 | 49.6 | 53.6 | 59.1 |
dc max | 39.2 | 42.3 | 47.3 | 48.8 | 55.3 | 58.8 | 63.3 | 70 | 75 | 80 | 85 |
dc min | 38.8 | 41.7 | 46.7 | 48.2 | 54.7 | 58.2 | 62.7 | 68 | 73 | 78 | 83 |
H max | 3.65 | 6.05 |
6.05 |
6.05 |
6.05 |
6.05 |
6.05 |
7.75 |
7.75 |
7.75 |
7.75 |
H min | 3.15 | 5.55 |
5.55 |
5.55 |
5.55 |
5.55 |
5.55 |
6.25 |
6.25 |
6.25 |
6.25 |
Enduring Two-fold self-locking washers are a good deal because they make bolted connections safer, more reliable, and longer-lasting, even in tough conditions. They cut down on the time things are out of use, lower maintenance costs, and reduce the chance of accidents from loose fasteners. Since they’re a strong locking solution—one that can even be reused sometimes—and work well mechanically, engineers dealing with vibration issues in all kinds of industries often pick these Enduring Two-fold self-locking washers.
Yeah, we can make custom ones. We keep standard sizes that follow DIN 25201 in stock, but we can also make Enduring Two-fold self-locking washers with non-standard diameters, thicknesses, or materials—though there’s a minimum order for that. We can also put special marks on them, like your logo or a unique part number, to help track them and for branding.