Lock washer - Company Ranking(7 companyies in total)

Last Updated：Sep 03, 2025 Aggregation Period:Aug 06, 2025〜Sep 02, 2025
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Company Name	Company information	Featured Products
Company Name	Company information	Product Image, Product Name, Price Range	overview	Application/Performance example
特殊発條興業 (トクハツ)	Address Hyogo/ number of employees 200 Business Activities Product Introduction [Washers, spacers, plates, retaining rings, disc springs, coil waves, eccentric and concentric snap rings, shims, thin plate springs, various sliding components, pressed parts] Processing Technology [Progressive die stamping, multi-forming, fine groove stamping, pressing of sintered, machined, and fine blanking products, austempering] Features and Technology [Fine groove processing, fine hole processing, thickening processing, irregular wire processing, high precision plate thickness, miniaturization proposals, in-house mold manufacturing, heat-resistant steel, handling of JIS products, friction coefficient reduction, independent prototyping, unit performance improvement] Key Partners Aoyama Manufacturing Co., Asakawa Manufacturing Co., Daihatsu Motor Co., Exedy, SUBARU, GKN Driveline Japan, Hilex Corporation, Hino Motors, Hitachi, Iseki Agricultural Machinery, Isuzu Motors, Jatco, JR Companies, JTEKT, Komatsu Manufacturing Co., Mazda, Mitsubishi Fuso Truck and Bus Corporation, Mitsubishi Motors Corporation, Nissan Motor Co., Nitto Seiko, NOK, Osaka Screw Manufacturing Co., Saga Iron Works, Hanamura Industries, Sannohashi, Topura, Toyota Motor Corporation, UD Trucks (in alphabetical order)	Spac, SPAK, waveform spring washer, super lock washer, SLW Other	SPAK Wave Spring Washer Super Lock Washer SLW Boasting one of the world's highest production volumes, it is used to prevent loosening in all types of screw fastenings. Compared to spring washers, it is lightweight and has a strong reactive force, making it less likely to damage the mating surface during tightening and preventing loosening during return due to the cutting edge. 【Features】 - Large spring reaction force: approximately 12 times that of SW2 (compared to our company) and approximately 5 times that of SW3 (compared to our company) - Lighter than spring washers: 64% of SW2 (compared to our company) and 52% of SW3 (compared to our company) when compared in M8 size - Spring reaction force acts evenly (please refer to the catalog diagram) - Less likely to damage the mating surface - Shorter bolts can be used (please refer to the catalog diagram) - One of the world's highest production volumes *For more details, please refer to the catalog or feel free to contact us.	Spac, SPAK, wave spring washer, super lock washer, SLW Bolts for automobiles, agricultural machinery, housing, electrical, and electronics.
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特殊発條興業 (トクハツ)

Address

Hyogo/

number of employees

200

Business Activities

Product Introduction [Washers, spacers, plates, retaining rings, disc springs, coil waves, eccentric and concentric snap rings, shims, thin plate springs, various sliding components, pressed parts] Processing Technology [Progressive die stamping, multi-forming, fine groove stamping, pressing of sintered, machined, and fine blanking products, austempering] Features and Technology [Fine groove processing, fine hole processing, thickening processing, irregular wire processing, high precision plate thickness, miniaturization proposals, in-house mold manufacturing, heat-resistant steel, handling of JIS products, friction coefficient reduction, independent prototyping, unit performance improvement]

Key Partners

Aoyama Manufacturing Co., Asakawa Manufacturing Co., Daihatsu Motor Co., Exedy, SUBARU, GKN Driveline Japan, Hilex Corporation, Hino Motors, Hitachi, Iseki Agricultural Machinery, Isuzu Motors, Jatco, JR Companies, JTEKT, Komatsu Manufacturing Co., Mazda, Mitsubishi Fuso Truck and Bus Corporation, Mitsubishi Motors Corporation, Nissan Motor Co., Nitto Seiko, NOK, Osaka Screw Manufacturing Co., Saga Iron Works, Hanamura Industries, Sannohashi, Topura, Toyota Motor Corporation, UD Trucks (in alphabetical order)

Featured Products

Spac, SPAK, waveform spring washer, super lock washer, SLW

overview

SPAK Wave Spring Washer Super Lock Washer SLW Boasting one of the world's highest production volumes, it is used to prevent loosening in all types of screw fastenings. Compared to spring washers, it is lightweight and has a strong reactive force, making it less likely to damage the mating surface during tightening and preventing loosening during return due to the cutting edge. 【Features】 - Large spring reaction force: approximately 12 times that of SW2 (compared to our company) and approximately 5 times that of SW3 (compared to our company) - Lighter than spring washers: 64% of SW2 (compared to our company) and 52% of SW3 (compared to our company) when compared in M8 size - Spring reaction force acts evenly (please refer to the catalog diagram) - Less likely to damage the mating surface - Shorter bolts can be used (please refer to the catalog diagram) - One of the world's highest production volumes *For more details, please refer to the catalog or feel free to contact us.

Application/Performance example

Spac, SPAK, wave spring washer, super lock washer, SLW Bolts for automobiles, agricultural machinery, housing, electrical, and electronics.
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Business Activities

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Lock washer - Company Ranking(7 companyies in total)

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