Lock Nuts（Applications, Functions：Lock）

• • On Sale Till 31/03/2025

  

  U-Nuts (Pack)【1-100 Pieces Per Package】

  MISUMI

  [Features]
  · Capable of stable anti-loosening effect. Prevents screws from falling off even when declines in axial tension.
  · Being a solid metal product, the nuts are highly resistant to heat and cold.
  · Simplified fastening task makes work management easier.
  · Easy parts management prevents inappropriate installation.
  · Reusable.
  [Materials] SS400, SUS304, Equivalent, SUS301.
  [Surfacetreatment] Trivalent bright chromate plating, Trivalent chromate.
  [Nominal of Thread (M)] 4, 5, 6, 8, 10, 12, 16.
  [Pitch] 0.7, 0.8, 1, 1.25, 1.5, 1.75, 2

  • Volume Discount

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day or more

• • On Sale Till 31/03/2025

  

  Double Locking Nuts

  MISUMI

  [Features]
  [Materials] SS400 equivalent, SUS304 equivalent, S45C equivalent, SCM435 equivalent.
  [Surface treatment] Trivalent chromate.
  [Height (mm)] 8, 10.6, 13.2, 16, 18.5, 20.

  • Volume Discount

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day

• • On Sale Till 31/03/2025

  

  Self-Locking Nut

  KST

  The friction ring swaged on the top of the nut engages with the thread of the bolt, providing a high-performance loosening prevention function. Since no special tool is required for linking, workability is excellent.

  	Special Price
  Days to Ship:	Same day or more

• 

  HARDLOCK Nut (Fine Thread)

  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 Nut

  Days to Ship:	8 Day(s) or more

• 

  Nylon Nut (Type 1)【1-12 Pieces Per Package】

  LOCKFASTENER

  The included nylon ring is fitted with a male screw to prevent loosening due to rotation applied from various directions, direct vibration, and shock.

  Days to Ship:	Same day or more

• 

  Lead Lock Nut【80-7,000 Pieces Per Package】

  SUNCO

  If necessary, it can be removed when required, and it does not become loose even it is shaken intensely during use, the lead lock nut is a product that resolves this contradictory duality well.

  CAD ：

  2D / 3D

  Days to Ship:	18 Day(s) or more

• • On Sale Till 31/03/2025

  

  U Nut Class 1 and 2 (Steel/SUS304)【1-2,500 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  	Special Price
  Days to Ship:	Same day or more

• 

  Type 1 U-Nut (SUS316L)

  FUJI SEIMITSU

  Prevailing torque type lock nut with "metal ring anti-loosening function".
  [Features]
  ·A locking nut that can be reused and exhibits a stable locking function.
  ·Prevents early disengagement even when the axial force is reduced. An all-metal product with excellent heat and cold resistance.
  ·Tightening is easy, and neither skilled techniques nor special tools are required.
  ·Since it exerts a self-locking effect by itself, parts management becomes easier and installation errors are prevented.
  [Applications]
  ·It is used in a wide range of industries, from steel structures such as railways and bridges to automobiles, motorcycles, and industrial machinery.
  ·In addition to its anti-loosening performance, it continues to evolve in terms of durability and vibration resistance, and works reliably in any operating environment.

  Days to Ship:	14 Day(s) or more

• 

  Stable Nut, Thin Type (Friction Nut)【1-1,800 Pieces Per Package】

  SOHWA SEISAKUSHO

  [Materials] SWCH equivalent, SUS304 equivalent.
  [Surface treatment] None, Trivalent chromate, bright chromate plating chromate plating.

  CAD ：

  2D / 3D

  Days to Ship:	14 Day(s) or more

• 

  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 Nut

  Days to Ship:	14 Day(s) or more

• • On Sale Till 31/03/2025

  

  Hardlock Nut (Thread-Lock Nut)【1-150 Pieces Per Package】

  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.

  	Special Price
  Days to Ship:	Same day or more

• 

  U Nut, Unified (UNF)【1-4,000 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	14 Day(s) or more

• 

  U Nut Type 3【1-4,000 Pieces Per Package】

  FUJI SEIMITSU

  Thread
  [Type]Metric coarse, Application/Function, Locking, Locking for detail, U-nut
  [Nominal Thread (M)] 4 5 6 8 10 12 14 16 20
  [Materials] Steel, Stainless steel
  [Sales unit] Minimum Quantity (Available for Purchase from 1 pc) Box and Pkg.
  [Surface treatment](Details) non-trivalent chromate, trivalent black, trivalent white, bright chromate plating, chromate plating, black chromate
  [Pitch (mm)] 0.7 0.8 1 1.25 1.5 1.75 2 2.5

  Days to Ship:	14 Day(s) or more

• 

  U Nut【1-20 Pieces Per Package】

  TRUSCO NAKAYAMA

  [Features]
  - The metallic friction ring makes contact with the thread on the bolt, increasing torque on the thread and preventing loosening. - Heat resistant, usable in locations with vibration, and reusable.
  
  [Use]
  - For locations where bolts can easily loosen.
  
  

  Days to Ship:	16 Day(s) or more

• 

  H-1 Rimmed Hard Locking Nut【1-300 Pieces Per Package】

  HARDLOCK INDUSTRY

  A new standard in hard lock nuts. Mountability greatly improved by stopping concave nuts using the rim shape (flange).

  Days to Ship:	Same day or more

• 

  Fine Hard Locking Nut

  HARDLOCK INDUSTRY

  Nut that uses the principle of the wedge. Bolts and nuts are integrated, and any kinds of vibration and shock are kept away.

  Days to Ship:	14 Day(s) or more

• 

  U Nut Type 1 (Fine Details)【1-65 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	14 Day(s) or more

• 

  U Nut (Fine)【1-65 Pieces Per Package】

  SUNCO

  [Material] Steel
  [Surface Processing] Trivalent White / Trivalent Black
  [Nominal of Thread (M)] 12/20/22/24/30/36/39/42
  [Application/Function] Loosening prevention
  [Thread Ridge Type] Metric Fine
  [Loosening Prevention Details] U Nut

  Days to Ship:	14 Day(s) or more

• • On Sale Till 31/03/2025

  

  Lock Nut - SWUS【1-50 Pieces Per Package】

  NABEYA BI-TECH

  A nut with a high performance locking (loosening prevention) mechanism. This mechanism prevents loosening caused by vibration.

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day or more

• 

  Semi-Flat Hard Locking Nut

  HARDLOCK INDUSTRY

  Nut that uses the principle of the wedge. Bolts and nuts are integrated, and any kinds of vibration and shock are kept away.

  Days to Ship:	14 Day(s) or more

• 

  Hyper Load Nut

  KHI

  The nut and spring are integrated to completely prevent loosening and falling of nuts. This effect to prevent loosening is maintained even if it is repeatedly used.

  Days to Ship:	14 Day(s) or more

• 

  U Nut (Fine P=1.5)

  SUNCO

  [Material] Steel
  [Surface Processing] None / Bright Chromate Plating / Trivalent White / Trivalent Black
  [Nominal of Thread (M)] 12/30
  [Application/Function] Loosening prevention
  [Thread Ridge Type] Metric Fine
  [Loosening Prevention Details] U Nut

  Days to Ship:	14 Day(s) or more

• 

  Thin Hard Locking Nut

  HARDLOCK INDUSTRY

  Nut that uses the principle of the wedge. Bolts and nuts are integrated, and any kinds of vibration and shock are kept away.

  Days to Ship:	14 Day(s) or more

• • On Sale Till 31/03/2025

  

  Nylon Nut Type 1【1-3,000 Pieces Per Package】

  SUNCO

  [Materials] S45C, Equivalent to steel SWCH, SUS303, Titanium, Brass
  [Surface treatment] None, trivalent chromate, bright chromate plating, chromate plating, nickel plating

  • Volume Discount

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day or more

• • On Sale Till 31/03/2025

  

  Nylon Nut Type 2

  SUNCO

  [Materials] Equivalent to SWCH, Equivalent to SUS304
  [Surface treatment] None, trivalent chromate, bright chromate plating, chromate plating, nickel plating

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day or more

• 

  Nylon Nut (Unified UNF)

  LOCKFASTENER

  The included nylon ring is fitted with a male screw to prevent loosening due to rotation applied from various directions, direct vibration, and shock.

  Days to Ship:	16 Day(s) or more

• 

  Nut, Whitworth【1-1,000 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	14 Day(s) or more

• 

  U-Nut Unified (UNC)【1-4,000 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	14 Day(s) or more

• 

  U Nut

  SUNCO

  [Material] Steel / Stainless Steel / S45C / Titanium / SCM435(H)
  [Surface Processing] Trivalent White / Trivalent Black / None
  [Nominal of Thread (M)] 5/10/12/14/16/18/24/30/36/42
  [Application/Function] Loosening prevention
  [Thread Ridge Type] Metric Coarse / Metric Fine
  [Loosening Prevention Details] Friction Nut

  Days to Ship:	8 Day(s) or more

• 

  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 Nut

  Days to Ship:	14 Day(s) or more

• • On Sale Till 31/03/2025

  

  Titanium Locking Nut - SWUT

  NABEYA BI-TECH

  Made of titanium. The specific gravity is about 60% that of stainless steel.
  · For applications where weight reduction is necessary, such as with automobiles, aircraft, space equipment, medical equipment, and robots.

  CAD ：

  2D / 3D

  	Special Price
  Days to Ship:	Same day or more

• 

  Flanged Lead Lock Nut【400-1,500 Pieces Per Package】

  SUNCO

  Lead lock nut which is easy to remove while remaining secure even when subjected to strong shaking force.

  CAD ：

  2D / 3D

  Days to Ship:	18 Day(s) or more

• 

  Tough Lock【400 Pieces Per Package】

  SUNCO

  Since three of the six surfaces of the nut are sloped conically, the tightening torque increases and nut loosening can be prevented.

  CAD ：

  2D / 3D

  Days to Ship:	18 Day(s) or more

• 

  Iron and Stainless Steel Stable Nut【1-2,000 Pieces Per Package】

  SOHWA SEISAKUSHO

  Suitable for the fastening of soft or fragile materials. Capable of performing an intermediate lock. Does not require a spring lock washer, either.

  Days to Ship:	14 Day(s) or more

• 

  Stable Nut, Thin Shape【1-1,800 Pieces Per Package】

  SOHWA SEISAKUSHO

  Suitable for the fastening of soft or fragile materials. Capable of performing an intermediate lock. Does not require a spring lock washer, either.

  Days to Ship:	14 Day(s) or more

• 

  Nylon Nut (Type 1) (Iron / Brass)【1-3,000 Pieces Per Package】

  TOMOE KOGYO

  Frictional force generated between the nylon ring and the screw part of the bolt reduces shock and vibration, and prevents the screw from loosening.

  Days to Ship:	8 Day(s) or more

• 

  Nylon Nut (Type 1 / Small / Fine)【1-150 Pieces Per Package】

  TOMOE KOGYO

  Nut comprises a metal main body together with a nylon ring (Nylon 66) that functions as a locking mechanism. (Fine)
  [Features]
  · Nylon 66 provides high rigidity, heat resistance and wear resistance, and also possesses excellent elasticity.
  · Nylon 66 maintains performance even under conditions that would be extreme for metals, and will not corrode like metals.
  · The internal diameter of the nylon ring is designed to standard to be the same dimension as the effective diameter of the nut's screw thread.
  · An external thread is formed to adhere closely to the nylon ring by fitting together with the external thread of the bolt, generating fitting friction in that portion.
  · This friction generates torque that prevents loosening of the nut caused by rotational vibration, linear vibration and impact, etc. applied from all directions.
  [Applications]
  · Aircraft, highway sound insulation walls, boats, etc.

  Days to Ship:	14 Day(s) or more

• • On Sale Till 31/03/2025

  

  E-Lock Nut【1-600 Pieces Per Package】

  SUNCO

  [Materials] Steel, Stainless steel
  [Surface treatment] None, trivalent chromate

  • Volume Discount

  	Special Price
  Days to Ship:	Same day or more

• 

  Fine, Small E-Lock Nut

  SUNCO

  [Materials]Steel "Surface Treatment" trivalent chromate "Thread type" metric fine

  Days to Ship:	18 Day(s) or more

• 

  U Nut Type 2【1-600 Pieces Per Package】

  FUJI SEIMITSU

  [Materials] SCM435 Threaded
  [Type]Metric coarse, Application/Function: Loosening prevention, Detailed loosening prevention, U nuts
  [Nominal Thread (M)] 6 8 10 12 14 16 18 20 22 24 27 30 33 36
  [Sales unit] Individual (Available for Purchase as 1pc) Box and Packaging.
  [Surface treatment](Detailed) trivalent white, uni-chromate plating, chrome plating - Hex nut standard: Type 2
  [Pitch (mm)] 1 1.25 1.5 1.75 2 2.5 3 3.5 4

  Days to Ship:	14 Day(s) or more

• 

  U Nut Type 2 (Fine Details)【1-120 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	Same day or more

• 

  U Nut Thin Special Pitch P=1.5

  FUJI SEIMITSU

  [Nominal Thread (M)] 12
  [Materials] Steel Thread
  [Type]Metric fine, Application/Function, Locking
  [Sales unit] Minimum Quantity (Available for Purchase from 1 pc), Locking for Detail, U-nut
  [Pitch (mm)] 1.5
  [Surface treatment](Details) Bright Chromate Plating

  Days to Ship:	14 Day(s) or more

• 

  Thin, Fine U-Nut【1-800 Pieces Per Package】

  FUJI SEIMITSU

  Definitive edition of Locking Nuts

  Days to Ship:	14 Day(s) or more

• 

  Locking K Nut【25-1,000 Pieces Per Package】

  KFC

  [Features]
  - Friction rings firmly press screw threads when tightening nuts, preventing them from coming loose.
  - Handled like a standard nut; no special tools required.
  - Compliant with NASA-standard NAS3350 and NAS3354 testing.
  
  
  [Use]
  - Locations with constant vibration, such as roads and railroads
  - Ceiling-hung bolts and racks
  - Mounting support brackets for cables
  

  Days to Ship:	14 Day(s) or more

• 

  HARDLOCK Nut (H-1/with Rim)

  SUNCO

  [Material] Steel/Stainless Steel
  [Surface Processing] Bright Chromate Plating / Trivalent White / None
  [Nominal of Thread (M)] 5/6/22/30
  [Application/Function] Loosening prevention
  [Thread Ridge Type] Metric Coarse
  [Loosening Prevention Details] Hard Lock Nut

  Days to Ship:	14 Day(s) or more

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