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Lock Nuts（Surface Treatment：Parkerizing）
Selection is also possible based on loosening prevention method (friction ring/spring/nylon, etc.).
[Lock Nuts/Non-Loosening Nuts]
These products prevent bolts from loosening by adding a locking mechanism to the nut body. Mechanism and characteristics of the loosening prevention mechanism differ depending on the brand.
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Hard Lock Nut【1-200 Pieces Per Package】
SUNCO
[Shape] Upper nut (convex type) and lower nut (concave type) are available.
· The top nut is perfectly circular with respect to the bolt, but the bottom nut has been eccentrically machined off-center with respect to the bolt.
[Features] Since the lower nut is eccentric, tightening the upper nut will apply a lateral force due to the wedging action. Friction to this male thread prevents loosening.
· Can be manually tightened to your desired position.
· Can be used repeatedly.
[Material] Steel/S45C/SCM435 (H)
[Surface Processing] Parkerizing (Phosphate Coating) / Trivalent White
[Nominal of Thread (M)] 8/10/12/14/16/18/22/24/30/33/36/39/45/48/52/56/64
[Application/Function] Loosening prevention
[Thread Ridge Type] Metric Coarse
[Loosening Prevention Details] Hard Lock NutFrom: ₹ 300.80 Days to Ship: 6 Day(s) or more 
6 Day(s) or more
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SUNCO
[Material] Stainless steel/S45C
[Surface Processing] None / Trivalent White / Parkerizing (Phosphate Coating)
[Nominal of Thread (M)] 10/14/16/18/20/24/30
[Application/Function] Loosening prevention
[Thread Ridge Type] Metric Fine
[Loosening Prevention Details] Hard Lock NutFrom: ₹ 188.80 Days to Ship: 5 Day(s) or more
5 Day(s) or more
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You can add up to 6 items per a category to the compare list.
Hard Locking Bearing Nuts (Thin)
SUNCO
[Material] Steel/S45C/Stainless Steel
[Surface Processing] Trivalent White / Molten Zinc Plating / Parkerizing (Phosphate Coating) / None
[Nominal of Thread (M)] 16/20/22/24/27/36
[Application/Function] Loosening prevention
[Thread Ridge Type] Metric Coarse / Metric Fine
[Loosening Prevention Details] Hard Lock NutFrom: ₹ 379.20 Days to Ship: 6 Day(s) or more
6 Day(s) or more
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You can add up to 6 items per a category to the compare list.
HARDLOCK INDUSTRY
A new standard in hard lock nuts. Mountability greatly improved by stopping concave nuts using the rim shape (flange).
From: ₹ 406.18 Days to Ship: 5 Day(s) or more
5 Day(s) or more
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You can add up to 6 items per a category to the compare list.
Hardlock Nut (Thread-Lock Nut)
HARDLOCK INDUSTRY
Some sizes are no longer available as they have been redesigned as a rimmed type. Please see the rimmed type if the size you are looking for is not available.
[Features]
・ Anti-loosening effect recognized by the world.
・ Torque and axial force control is possible.
・ Can be used repeatedly.
・ Workability is simple and good.
・ Contributes to significant cost reduction.From: ₹ 585.13 Days to Ship: 5 Day(s) or more
5 Day(s) or more
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You can add up to 6 items per a category to the compare list.
HARDLOCK Nut (Whitworth)【40-100 Pieces Per Package】
SUNCO
[Material] S45C
[Surface Processing] Trivalent White / Parkerizing (Phosphate Coating)
[Nominal of Thread (inch)] 3/8, 1/2, 5/8, 3/4, 7/8, 1
[Application/Function] Loosening prevention
[Thread Ridge Type] Whitworth Coarse
[Loosening Prevention Details] Hard Lock NutFrom: ₹ 512.00 Days to Ship: 6 Day(s) or more
6 Day(s) or more
| Brand |
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| From |
| Days to Ship |
| Nominal of Thread (M) |
| Material |
| Applications, Functions |
| Thread Type |
| Surface Treatment |
| Sales Unit |
| Locking Details |
| Nominal of Thread (inch) |
| Surface Treatment (Details) |
| Hex Nut Type |
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.  | 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 | SUNCO | SUNCO | SUNCO | HARDLOCK INDUSTRY | HARDLOCK INDUSTRY | SUNCO |
| Product Series | ||||||
| From | ₹ 300.80 | ₹ 188.80 | ₹ 379.20 | ₹ 406.18 | ₹ 585.13 | ₹ 28,179.20 |
| Days to Ship | 6 Day(s) or more | 5 Day(s) or more | 6 Day(s) or more | 5 Day(s) or more | 5 Day(s) or more | 6 Day(s) or more |
| Nominal of Thread (M) | 14 ～ 18 | 10 ～ 30 | 16 ～ 36 | 16 | 12 ～ 20 | - |
| Material | Steel | Steel | Steel | Steel | Steel | Steel |
| Applications, Functions | Lock | Lock | Lock | Lock | Lock | Lock |
| Thread Type | Metric, Coarse | Metric, Fine | Metric, Coarse | Metric, Coarse | Metric, Coarse | Whit, Coarse |
| Surface Treatment | Parkerizing | Parkerizing | Parkerizing | Parkerizing | Parkerizing | Parkerizing |
| Sales Unit | Low Quantity (Available beginning with 1 pc.) ～ Box, Pkg. | Low Quantity (Available beginning with 1 pc.) | Low Quantity (Available beginning with 1 pc.) | Low Quantity (Available beginning with 1 pc.) | Low Quantity (Available beginning with 1 pc.) | Box, Pkg. |
| Locking Details | Hard Lock Nut | Hard Lock Nut | Hard Lock Nut | Hard Lock Nut | Hard Lock Nut | Hard Lock Nut |
| Nominal of Thread (inch) | - | - | - | - | - | 1 ～ 7/8 |
| Surface Treatment (Details) | Other Special Treatment | Other Special Treatment | Other Special Treatment | Parkerizing | Parkerizing | Other Special Treatment |
| Hex Nut Type | - | - | - | - | - | - |
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Specification/Dimensions
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Nominal of Thread (M)
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Material
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Applications, Functions
- Standard
- Lock
- For Welding
- Fall-off Prevention
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Thread Type
- Metric, Coarse
- Metric, Coarse (Left)
- Metric, Fine
- Unified, Coarse (UNC)
- Unified, Fine (UNF)
- Whit, Coarse
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Surface Treatment
- Not Provided
- Electroless Nickel Plating
- Trivalent Chromate
- Bright Chrome Plating
- Zinc Plating
- Chromate Plating
- Nickel Plating
- Parkerizing
- Polishing
- Painting, Coating
- Passivated
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Sales Unit
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Locking Details
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Nominal of Thread (inch)
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Surface Treatment (Details)
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Hex Nut Type
Payment Method
- Credit Card
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- Debit Cart
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- Net Banking
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- UPI
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- Cheque on delivery
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- Online payment
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