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MISUMI Spacers, Washers（Product type：For countersunk bolt）
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Free Washers -Normal・For Countersunk Bolt・Counterbore-
MISUMI
Free washer for general purpose, countersunk bolts, and counterbore. You can choose between no surface treatment or electroless nickel plating.
D (Outer diameter)(mm) d/P/V (Hole diameter)(mm) t (Thickness)(mm) Product type Material Surface treatment 5 ～ 100 - 1 ～ 50 For countersunk bolt S45C None / Electroless nickel plated Days to Ship: 8 Day(s) or more 
8 Day(s) or more
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Free Washers (For Heat Insulation) -Normal・For Countersunk Bolt・Counterbore-
MISUMI
Free washer (for insulation) for general purpose, countersunk bolts, and counterbore. The material is stainless steel.
D (Outer diameter)(mm) d/P/V (Hole diameter)(mm) t (Thickness)(mm) Product type Material Surface treatment 5 ～ 100 - 1 ～ 50 For countersunk bolt SUS416 - Days to Ship: 8 Day(s) or more
8 Day(s) or more
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Washers (For Heat Insulation)/ (Riser Pads)
MISUMI
This is a washer (riser pad) for insulation. Stainless steel SUS416 has low thermal conductivity, making it ideal for insulation.
D (Outer diameter)(mm) d/P/V (Hole diameter)(mm) t (Thickness)(mm) Product type Material Surface treatment 30 ～ 40 - 10 ～ 20 For countersunk bolt SUS416 - Days to Ship: 8 Day(s) or more
8 Day(s) or more
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You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  | |
| Brand | MISUMI | MISUMI | MISUMI |
| Product Series | Free Washers (For Heat Insulation) -Normal・For Countersunk Bolt・Counterbore- | ||
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| From | - | - | - |
| Days to Ship | 8 Day(s) or more | 8 Day(s) or more | 8 Day(s) or more |
| D (Outer diameter)(mm) | 5 ～ 100 | 5 ～ 100 | 30 ～ 40 |
| d/P/V (Hole diameter)(mm) | - | - | - |
| t (Thickness)(mm) | 1 ～ 50 | 1 ～ 50 | 10 ～ 20 |
| Product type | For countersunk bolt | For countersunk bolt | For countersunk bolt |
| Material | S45C | SUS416 | SUS416 |
| Surface treatment | None / Electroless nickel plated | - | - |
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Specification/Dimensions
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D (Outer diameter)(mm)
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d/P/V (Hole diameter)(mm)
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t (Thickness)(mm)
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Product type
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Material
- S45C
- SUS416
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Surface treatment
- None
- Electroless nickel plated
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FAQ Spacers, Washers
- Question: What is the difference between a spacer and a washer?
- Answer: Washers are primarily used to distribute pressure and prevent damage to surfaces when fasteners are tightened. Spacers are used to create a specific distance between two components. They often have more precise dimensions and tolerances than washers.
- Question: What materials are spacers and washers made of?
- Answer: Spacers and washers come in various materials, including: • Metal: Steel, stainless steel, aluminum, brass. • Plastic: Nylon, PTFE (Teflon), PVC. • Rubber: Neoprene, silicone, or other flexible materials for vibration damping or sealing. • Ceramic and composites are used in specific applications that require heat or chemical resistance.
- Question: How do I choose the right size of spacer or washer?
- Answer: • Inner Diameter (ID): The hole size should match the bolt or shaft it’s used with. • Outer Diameter (OD): Choose based on the load distribution required. • Thickness (for washers) or Length (for spacers): Depends on the gap or spacing needed in your assembly. For precision requirements, check the manufacturer’s specifications.
- Question: What factors should I consider when choosing a material for a spacer or washer?
- Answer: Strength and durability: The material should be able to withstand the loads and conditions of the application. • Corrosion resistance: If the spacer or washer will be exposed to corrosive environments, a corrosion-resistant material should be used. • Electrical conductivity: If electrical conductivity is important, a conductive material should be used. • Thermal conductivity: If thermal conductivity is important, a thermally conductive material should be used.
- Question: What are the common finishes for spacers and washers?
- Answer: • Zinc plating: Provides corrosion resistance. • Cadmium plating: Provides excellent corrosion resistance but is often avoided due to environmental concerns. • Nickel plating: Provides good corrosion resistance and a smooth finish. • Black oxide finish: Provides a dark, protective finish.
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