This booklet explains the causes of bolt loosening and serves as a guide to understanding proper fastening methods.
The publication includes issues related to bolt fastening, factors causing axial force loss, methods for preventing loosening of bolt fastenings, and guidance for selecting anti-loosening measures. It compares and evaluates common methods for preventing loosening of bolt fastenings in the service life of assemblies, allowing you to choose appropriate fastening methods to solve problems related to bolt fastening. [Contents (excerpt)] ■ Why do bolts loosen? ■ Issues with bolt fastening ■ Factors causing axial force loss ■ Guidance for selecting anti-loosening measures ■ Anti-loosening methods for bolt fastening by product ■ Corrosion prevention for metals >>>NEWS<<< Nord-Lock Japan will exhibit at the "Plant Maintenance Show" held from July 24 to 26. If you plan to attend or are interested, please stop by our booth (M4-176).
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basic information
The bolt loosening prevention "Nord-Lock Washer" consists of a pair of washers that provide excellent workability and demonstrate a high loosening prevention effect. 【Features】 ■ High loosening prevention effect that physically extracts the axial force of the bolt ■ Simply tightening the bolt and nut allows for easy fastening work, leading to reduced construction time and cost savings * It is the only NETIS registered product for bolt loosening prevention and has been certified as a technology for promoting utilization (KKK-190002-VE).
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For more details, please refer to the PDF document or feel free to contact us.
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![[Case Study] Nord-Lock Washers in the Construction and Civil Engineering Industry](https://image.mono.ipros.com/public/catalog/image/01/041/662327/IPROS94540007683105244959.jpeg?w=120&h=170)
![[Case Study] Nord-Lock Washer _ Construction and Civil Engineering Industry _ 202406](https://image.mono.ipros.com/public/catalog/image/01/e86/762599/IPROS663555299386515208.jpeg?w=120&h=170)
Company information
Nortlock Japan Co., Ltd. aims to be a partner in solving all bolt fastening challenges, centered around four brands: the "Nortlock Washer," a locking mechanism that does not rely on friction and prevents loosening; the "Superbolt," which allows enormous bolts and nuts that cannot be tightened by hand to be tightened with just one torque wrench; the "Boltight," which can simultaneously tighten multiple large-diameter bolts with uniform pressure; and the "Expander," a pivot pin for construction and heavy machinery that can be used semi-permanently.
![Nortlock Washer with Railway Vehicle Adoption Examples [NETIS Registered]](https://image.mono.ipros.com/public/product/image/098/2000363247/IPROS63548057146633933991.jpeg?w=280&h=280)
![[NETIS Registered Product] 'Nord-Lock Washer'](https://image.mono.ipros.com/public/product/image/4fd/2000472017/IPROS16416069068157097338.png?w=280&h=280)
![[Nortlock Product Adoption Case] Tokai Railway Company (JR Tokai)](https://image.mono.ipros.com/public/product/image/5b9/2000598313/IPROS07786201443829651164.png?w=280&h=280)
![[Nortlock Product Adoption Case] Kawasaki Heavy Industries, Ltd.](https://image.mono.ipros.com/public/product/image/322/2000598321/IPROS89400243526552317103.png?w=280&h=280)
