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Domed (Acorn) Nuts(Locking Details:U Nut)
Category page for Cap Nuts. For MISUMI, you can select from nominal, type of material and type of surface processing. A range of products are handled, from regular metric thread types through imperial thread types.
In addition to general cap nuts, there are also serrated types, disc spring types, and friction types for preventing screws from loosening.
[Cap Nuts]
Cap nuts are hexagonal nuts closed on one side, so the threaded hole does not extend the whole length. This prevents bolts from sticking out, giving a beautiful appearance and preventing issues caused by snagging on protruding bolts.
These are sometimes called "cosmetic nuts" because they improve appearance and enhance safety. However, since one end of the nut part is blocked, one must consider the length of the thread relative to the bolt length to be used.
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- All
- 1 Day(s) or Less
- 2 Day(s) or Less
- 4 Day(s) or Less
- 5 Day(s) or Less
- 6 Day(s) or Less
- 7 Day(s) or Less
- 8 Day(s) or Less
- 9 Day(s) or Less
- 12 Day(s) or Less
- 13 Day(s) or Less
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U Nut with Cap【1-3,000 Pieces Per Package】
FUJI SEIMITSU
Screw thread
[Type] Metric coarse application / function prevents loosening prevents loosening details U nut
[Nominal designation of screw thread (M)] 5 6 8 10 12 14 16 20 24
[Material] Steel stainless steel
[Sales unit] Individual (can be purchased as a single unit) boxes, packs
[Surface treatment] (details) none trivalent chromate trivalent black trivalent white bright chromate plating chromate plating chromate plating bright chromate
[Pitch (mm)] 0.8 1 1.25 1.5 1.75 2 2.5 3
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U Nut with Cap, Fine
FUJI SEIMITSU
A nut that exhibits a stable locking function.
[Features]
·Prevents early disengagement even when the axial force is reduced.
·All-metal product with excellent heat and cold resistance.
·Easy to tighten and prevents mounting errors.
·Reusable.
[Applications]
·Ideal for steel structures such as railroads and connecting bridges, cars, motorcycles, and industrial machinery.
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Nominal of Thread (M)
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Thread Type
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Applications, Functions
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Nominal of Thread (inch)
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Hex Nut Type
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Locking Details
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| Brand | FUJI SEIMITSU | FUJI SEIMITSU |
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| Product Series | U Nut with Cap【1-3,000 Pieces Per Package】 | U Nut with Cap, Fine |
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| Days to Ship |
5 Day(s) or more
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5 Day(s) or more
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| Nominal of Thread (M) | 5 ~ 24 | 10 |
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| Material | Stainless Steel ~ Steel | Steel |
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| Surface Treatment | - | - |
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| Thread Type | Metric, Coarse | Metric, Coarse |
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| Applications, Functions | Lock | Lock |
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| Sales Unit | Low Quantity (Available beginning with 1 pc.) ~ Box, Pkg. | Low Quantity (Available beginning with 1 pc.) |
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| Nominal of Thread (inch) | - | - |
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| Surface Treatment (Details) | Bright Chrome Plating ~ Trivalent Chromate | Chromate Plating |
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| Hex Nut Type | - | - |
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| Locking Details | U Nut | U Nut |
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Specification/Dimensions
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Nominal of Thread (M)
- 3
- 4
- 5
- 6
- 8
- 10
- 12
- 14
- 16
- 18
- 20
- 22
- 24
- 27
- 30
- 33
- 36
- 42
- 48
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Material
- Brass
- Plastic
- Stainless Steel
- Steel
- Titanium
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Surface Treatment
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Not Provided
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Trivalent Chromate
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Bright Chrome Plating
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Zinc Plating
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Chromate Plating
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Nickel Plating
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Chrome Plating
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Parkerizing
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Painting, Coating
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Silver/Copper/Tin Plating
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Thread Type
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Metric, Coarse
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Metric, Coarse (Left)
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Metric, Fine
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Unified, Coarse (UNC)
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Whit, Coarse
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Applications, Functions
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Standard
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Lock
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For Welding
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Clean Env. Compatible
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For Vacuum Equipment
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Sales Unit
- Low Quantity (Available beginning with 1 pc.)
- Box, Pkg.
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Nominal of Thread (inch)
- 1
- 1/2
- 1/4
- 3/4
- 3/8
- 3/16
- 5/8
- 5/16
- No. 6
- 7/8
- No. 8
- No. 10
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Surface Treatment (Details)
- Black Paint
- Bright Chrome Plating
- Chromate Plating
- Chrome Plating
- Copper Plating
- Hot Zinc Plating
- Nickel Plating
- Not Provided
- Parkerizing
- Trivalent Chromate
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Hex Nut Type
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Locking Details
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U Nut
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Friction Nut
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Wedge nut
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