| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Keystone Electronics Corp. |
WASHER FLAT RETAINING #4 NYLON |
2700 |
|
 |
Keystone Electronics Corp. |
WASHER INT TOOTH PHOSPHOR BRONZE |
1330109700 |
|
 |
Richco, Inc. (Essentra Components) |
WASHER FLAT RETAINING M4 NYLON |
0 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .296 ID, .750 OD, . |
5000 |
|
 |
RAF |
.312OD X .012 THICK X .146ID |
1953 |
|
 |
Richco, Inc. (Essentra Components) |
WASHER FLAT RETAINING M3 NYLON |
0 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, NYLON, BLACK, .090 |
21920 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .505 ID, 1.500 OD, |
2000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .385 ID, .885 OD, . |
2000 |
|
 |
Richco, Inc. (Essentra Components) |
RETAINING WASHER, NATURAL, NYLON |
9975 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .635 ID, 1.120 OD, |
2000 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .644 ID, 1.181 OD, |
0 |
|
 |
Keystone Electronics Corp. |
WASHER FLAT 3/8 FIBRE |
164818000 |
|
 |
Keystone Electronics Corp. |
WASHER FLAT 3/8 FIBRE |
11100 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .500 ID, .775 OD, . |
2000 |
|
 |
Keystone Electronics Corp. |
WASHER FLAT RETAINING #8 NYLON |
0 |
|
 |
Richco, Inc. (Essentra Components) |
WASHER FLAT RETAINING M5 PLASTIC |
3605 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .886 ID, 1.250 OD, |
0 |
|
 |
TubeDepot |
LOCK WASHER INTERNAL TOOTH 1/2 |
160 |
|
 |
Richco, Inc. (Essentra Components) |
FLAT WASHER, .406 ID, 1.005 OD, |
2000 |
|
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: