| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .437 ID, .625 OD, . |
3000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .138 ID, .276 OD, . |
2965 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, 5.30MM ID, M5 / #10 |
9675 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .265 ID, 1.000 OD, |
1000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .156 ID, .250 OD, . |
0 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .434 ID, .688 OD, . |
0 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .630 ID, .812 OD, . |
1960 |
|
 |
Richco, Inc. (Essentra Components) |
RETAINING WASHER, NATURAL, NYLON |
48107 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .312 ID, .875 OD, . |
2990 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .390 ID, 1.000 OD, |
1498 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .290 ID, .560 OD, . |
4970 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .320 ID, .625 OD, . |
4790 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, BLACK, .115 |
2427 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .948 ID, 1.800 OD, |
1499 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .171 ID, .630 OD, . |
4900 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, NATURAL, .19 |
72067 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .942 ID, 1.132 OD, |
0 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, BLACK, .406 |
9990 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .301 ID, .620 OD, . |
1965 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .187 ID, .256 OD, . |
2950 |
|
Washers are thin plate-like mechanical components with a central hole, typically used to distribute the load of threaded fasteners, prevent loosening, or create seals. As critical elements in assembly systems, they enhance structural integrity, reduce wear, and improve vibration resistance. Modern engineering applications rely on washers to optimize performance across diverse environments.
| Type | Functional Characteristics | Application Examples |
|---|---|---|
| Flat Washers | Distribute load, prevent surface damage | Machinery bases, construction equipment |
| Spring Washers | Provide axial tension, absorb vibrations | Automotive engines, railway tracks |
| Lock Washers | Prevent nut/bolt rotation under vibration | Aerospace fasteners, industrial pumps |
| Sealing Washers | Create fluid/gas-tight barriers | Pipe flanges, hydraulic systems |
Typical washers feature a flat annular design with precise inner/outer diameter ratios. Advanced variants incorporate:
| Parameter | Importance |
|---|---|
| Material Hardness (HV/HRC) | Determines wear resistance and load capacity |
| Inner Diameter Tolerance ( m) | Affects fit precision with fasteners |
| Corrosion Resistance (hrs in salt spray) | Dictates service life in harsh environments |
| Spring Rate (N/mm) | Measures elasticity for vibration damping |
| Operating Temperature Range ( C) | Defines thermal stability limits |
| Manufacturer | Representative Product | Key Feature |
|---|---|---|
| Nord-Lock Group | X-series washers | wedge-locking system for vibration resistance |
| ITW Shakeproof | Prevailing torque washers | Deformable split ring design |
| MISUMI | FCMZ series spring washers | Optimized for robotic assembly |
Key considerations include:
Example: Selecting stainless steel Belleville washers for offshore wind turbine bolts ensures corrosion resistance and maintains clamping force under dynamic loads.
Emerging trends include: