| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .578 ID, .756 OD, . |
4945 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .260 ID, .312 OD, . |
2988 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .380 ID, 1.370 OD, |
1000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, 8.40MM ID, M8 / 5/1 |
24975 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .147 ID, .250 OD, . |
5000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, 1.255 ID, 1.695 OD, |
970 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .500 ID, .880 OD, . |
960 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .250 ID, .375 OD, . |
2975 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .203 ID, .565 OD, . |
9990 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .251 ID, .389 OD, . |
4990 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .253 ID, .375 OD, . |
5000 |
|
 |
Richco, Inc. (Essentra Components) |
WASHER FLAT M2.5 NYLON BLACK |
975 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, 17MM ID, M16 / 5/8 |
995 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .120 ID, .187 OD, . |
12895 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .128 ID, .245 OD, . |
2864 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, BLACK, .377 |
2995 |
|
 |
Richco, Inc. (Essentra Components) |
WASHER FLAT M10 PLASTIC |
6985 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, BLACK, .130 |
4925 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .510 ID, 1.312 OD, |
500 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .405 ID, .540 OD, . |
2500 |
|
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: