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Metal Washers For Flat Head Bolt
Part Number
Configured Part Number is shown.
- Download
Product Details - CAD Data unavailable
Product Overview
It is generally used as a component that is cushioned at the workpiece connector and plays a role of precise adjustment of the clearance on the cushioned part.
It can also be used to protect the surface of the connected part from being scratched by the nut and disperse the pressure generated by the nut on the connected part.
It can also be used to protect the surface of the connected part from being scratched by the nut and disperse the pressure generated by the nut on the connected part.
Dimensional Drawing
Specifications Overview
・Material Table
If there are requirements for product hardness, refer to
Metal Washer Hardened Products.
| Standard | Configurable Counterbored |  Material |  Surface Treatment | D (mm) | V (mm) | E(mm) | T(mm) |
| - | E-FWSRC | General structural steel or carbon steel | - | 10~60 | 2~30 | 2~10 | 2~10 |
| E-WSRB | E-FWSRB | Ferroferric Oxide Protective Film | |||||
| E-WSRM | E-FWSRM | Electroless Nickel Plating | |||||
| - | E-FWSRA | Aluminum Alloy | Clear Anodized | ||||
| E-WSRS | E-FWSRS | Austenitic stainless steel | - |
If there are requirements for product hardness, refer to
Metal Washer Hardened Products.Specification Table
■Standard Type for Flat Head Bolt
| Part Number |  TSelection | E | V | |
 Type |  D | |||
| E-WSRB E-WSRM | 25 | 5 | 5 | 9 |
| 6 | ||||
| 30 | 6 | 6 | 11 | |
| 8 | ||||
■Custom Dimensions Type for Flat Head Bolt
| Part Number | D | V 0.5mm increments (V3 or more) |  E0.5mm increments |  Ｔ0.5mm increments |
| E-FWSRC E-FWSRB E-FWSRM E-FWSRA E-FWSRS | 10.0～20.0 (0.5mm increments) | 2.0 2.6 3～30 | 2.0～10.0 E≤T | 2.0~5.0 |
| 5.5~10.0 | ||||
| 21～30 (1mm increments) | 2.0~5.0 | |||
| 5.5~10.0 | ||||
| 31～40 (1mm increments) | 2.0~5.0 | |||
| 5.5~10.0 | ||||
| 41～50 (1mm increments) | 2.0~5.0 | |||
| 5.5~10.0 | ||||
| 51～60 (1mm increments) | 2.0~5.0 | |||
| 5.5~10.0 | ||||
| (D-V)/2-E≥1->Minimum wall thickness must be more than 1mm. | ||||
| When E=T, V thickness is 0, so the roundness cannot be guaranteed. | ||||
Product Features
Feature 1: There is a wide range of options for inner and outer diameters and thickness, and for the T dimension configurable type, the thickness can be specified in 0.5mm increments.
Feature 2: High-precision products made by cutting and machining can realize high-precision spatial adjustment.
Feature 3: Compared with standard washers, metal washers will not be dented after the connected part is screwed in due to the locking, and cause the bolts to loosen.
Feature 4: Compared with standard stamped washers, metal washers increase the friction with the mounting part, which can prevent loosening.
Feature 2: High-precision products made by cutting and machining can realize high-precision spatial adjustment.
Feature 3: Compared with standard washers, metal washers will not be dented after the connected part is screwed in due to the locking, and cause the bolts to loosen.
Feature 4: Compared with standard stamped washers, metal washers increase the friction with the mounting part, which can prevent loosening.
Usage Method
Precautions
①When D=16 or less, chamfer C is 0.2 or less.
When D=20 or more, chamfer C is 0.5 or less.
②Metal washer is a turned product, not a stamped part.
③When the relative humidity of the operating environment is high and certain anti-rust ability is required, please choose products with electroless nickel plating surface treatment or stainless steel SUS3 series materials.
④When the operating environment requires certain abrasion resistance and hardness for metal washers, please give priority to metal washer quenched products.
When D=20 or more, chamfer C is 0.5 or less.
②Metal washer is a turned product, not a stamped part.
③When the relative humidity of the operating environment is high and certain anti-rust ability is required, please choose products with electroless nickel plating surface treatment or stainless steel SUS3 series materials.
④When the operating environment requires certain abrasion resistance and hardness for metal washers, please give priority to metal washer quenched products.
Example of Use
Application Industries
| Smart Phones | Electronic & Electrical | Lithium battery | ||
 |  |  | ||
| Automotive | Robotics | Medical | ||
 |  |  |
Related Products
| Ultra short head hex socket bolt | Adjustment Screw Components Hex Head Stud | Axle Pin Bolt | ||
 |  |  | ||
| Representative model: CBSA6-12 | Representative model: ANH4-20 | Representative model: DBTS6-3-10 | ||
| Advantages: space saving, sufficient stock | Advantages: Front end hardened, optional length | Advantages: Accurate positioning, high shaft precision |
Related Documents
| Part Number |
|---|
| E-FWSRA-D[10-20/0.5]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRA-D[10-20/0.5]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRA-D[21-60/1]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRA-D[21-60/1]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRB-D[10-20/0.5]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRB-D[10-20/0.5]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRB-D[21-60/1]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRB-D[21-60/1]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRC-D[10-20/0.5]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRC-D[10-20/0.5]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRC-D[21-60/1]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRC-D[21-60/1]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRM-D[10-20/0.5]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRM-D[10-20/0.5]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRM-D[21-60/1]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRM-D[21-60/1]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRS-D[10-20/0.5]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRS-D[10-20/0.5]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRS-D[21-60/1]-V[2,2.6]-E[2-10/0.5]-T[2-10/0.5] |
| E-FWSRS-D[21-60/1]-V[3-30/0.5]-E[2-10/0.5]-T[2-10/0.5] |
| E-WSRB25-[5,6] |
| E-WSRB30-[6,7,8] |
| E-WSRB40-10 |
| E-WSRB50-10 |
| E-WSRM25-[5,6] |
| E-WSRM30-[6,7,8] |
| E-WSRM40-10 |
| E-WSRM50-10 |
| E-WSRS30-[6,7,8] |
| E-WSRS40-10 |
| E-WSRS50-10 |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | O.D. (mm) | I.D. (mm) | Material | Surface Treatment | Countersunk Hole Depth E (Ø) | Size Specified Method | Thickness T (mm) | I.D. V (φ) | O.D. D (φ) | Tapered Hole Depth E (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
- | 1 Piece(s) | 9 Day(s) | - | - | [Aluminum] Aluminum Alloy | Anodize (Clear) | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 9 Day(s) | - | - | [Aluminum] Aluminum Alloy | Anodize (Clear) | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 9 Day(s) | - | - | [Aluminum] Aluminum Alloy | Anodize (Clear) | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 9 Day(s) | - | - | [Aluminum] Aluminum Alloy | Anodize (Clear) | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Black Oxide | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Black Oxide | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Black Oxide | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Black Oxide | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Stainless Steel] Austenitic stainless steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Stainless Steel] Austenitic stainless steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 10 ～ 20 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Stainless Steel] Austenitic stainless steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 2 ～ 2.6 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | - | - | [Stainless Steel] Austenitic stainless steel | Not Provided | - | Custom dimensions | 2 ～ 10 | 3 ～ 30 | 21 ～ 60 | 2 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) | 25 | 9 | [Steel] General Structural Steel or Carbon Steel | Black Oxide | 5 | Dimension selectable | 5 ～ 6 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 30 | 11 | [Steel] General Structural Steel or Carbon Steel | Black Oxide | 6 | Dimension selectable | 6 ～ 8 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 40 | 11 | [Steel] General Structural Steel or Carbon Steel | Black Oxide | 6 | Dimension selectable | 10 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 50 | 11 | [Steel] General Structural Steel or Carbon Steel | Black Oxide | 6 | Dimension selectable | 10 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 25 | 9 | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | 5 | Dimension selectable | 5 ～ 6 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 30 | 11 | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | 6 | Dimension selectable | 6 ～ 8 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 40 | 11 | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | 6 | Dimension selectable | 10 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 50 | 11 | [Steel] General Structural Steel or Carbon Steel | Electroless Nickel Plating | 6 | Dimension selectable | 10 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 30 | 11 | [Stainless Steel] Austenitic stainless steel | Not Provided | 6 | Dimension selectable | 6 ～ 8 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 40 | 11 | [Stainless Steel] Austenitic stainless steel | Not Provided | 6 | Dimension selectable | 10 | - | - | - | ||
- | 1 Piece(s) | 7 Day(s) | 50 | 11 | [Stainless Steel] Austenitic stainless steel | Not Provided | 6 | Dimension selectable | 10 | - | - | - |
Loading...
Basic Information
| I.D. Shape | Flat Head Screw | I.D. Tolerance | +0.3~+0.1 | Thickness / Length Tolerance | ±0.1 |
|---|---|---|---|---|---|
| O.D. Tolerance | 0~-0.2 | Sale Type | Single Item | Hardness(HRC) | Without Quenching |
| Accuracy | Normal |
Specification/Dimensions
-
O.D.(mm)
-
I.D.(mm)
-
Material
- Steel
- Stainless Steel
- Aluminum
- Steel
-
Surface Treatment
- Not Provided
- Black Oxide
- Electroless Nickel Plating
- Anodize (Clear)
-
Countersunk Hole Depth E(Ø)
- 5
- 6
-
Size Specified Method
- Custom dimensions
- Dimension selectable
-
Thickness T(mm)
-
I.D. V(φ)
-
O.D. D(φ)
-
Tapered Hole Depth E(mm)
-
type
- E-FWSRA
- E-FWSRB
- E-FWSRC
- E-FWSRM
- E-FWSRS
- E-WSRB
- E-WSRM
- E-WSRS
Days to Ship
-
- All
- 7 Day(s) or Less
- 9 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
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