Dimensions of type B spring washers（medium-width version)

SKB Large Tooth French Washers effectively protect joint surfaces, reusable, independent materials, low torque variation during installation, will not turn on themselves when screws are turned, and fit any standard and metered threads.
Name： SKB Large Face French Washers
Main material: S60C or SUS304316 (A2.A4) and other special customized materials. (Carbon steel hardness 40-47HRC) (Stainless steel 300-500HV)
Surface treatment: stainless steel hardened and polished color or spring steel phosphate black, mechanical zinc plating, nickel plating, and Dacromet coating at the.The effective protection against self-loosening and unscrewing.
The “SK” Serrated Locking Washer and “NSK” (improved design) prevent self-loosening of screwed joints and damage to the bearing surfaces and consequent variations in the tightening torques, as they occur in thread lockers with teeth are avoided with lock washers through the special geometrical shape of the locking edges.The effective protection against self-loosening and unscrewing.
The "SK" Serrated Locking Washer prevents the self-loosening of screwed joints. Damage to the bearing surfaces and consequent variations in the tightening torques, as they occur in thread lockers with teeth are avoided with lock washers through the special geometrical shape of the locking edges.    

"SK" series lock washers with teeth can effectively prevent the loosening of threads, through the special geometry of the locking edge, effectively avoiding damage to the bolted joint surface, to cope with the impact of the torque changes; the washer surface has increased the S-type teeth to improve the anti-loosening coefficient, the "SK" series of French lock washers are available in four different models: SKS - SKM - SKB - SKZ, all have excellent anti-loosening locking performance. SK" series French lock washers have four different models: SKS - SKM - SKB - and SKZ, All have excellent anti-loosening locking performance. The preload locking effect is better than that of disc washers, which are widely used in the European railroad field, and the tooth pattern on the surface increases the anti-loosening coefficient! At present, the total design of the tooth pattern has a variety of, depending on the size of the contact surface of the washer different tooth patterns will also change! Model: S-type (small), M-type (medium), B-type (large), Z-type (cylindrical head bolts)
SKB washer use: B-type lock washers for the widening design, used in the head of the larger contact surface of the bolt, the larger the contact preload and locking effect is better!
Suitable for: slotted holes, connecting components with dynamic loads, sheet metal parts.
Manufacture of SKB washers: SKB lock washers implementation standard. Specifications: M6-m12 models. Can also provide customized on request.
Main steel quality: SUS304.316, A2.A4 super stainless steel etc.
Hardened Grade: HV350 Conforms to Grade 10 strength. Surface treatment: hardened polished and cleaned, effectively tested for more than 800 hours, fully compliant with EU ROHS standards.
After hardening lock washers will be slightly magnetic is normal, material composition and salt spray-related will not change!    

Size Can also be According to the Customer's requirement please check the detailed specification sheet details PDF， CAD, 17-18Page See more product details.    

Packing: The inner packaging consists of polyfoam, while the outer layer is a carton. The carton sizes are 29*19*19.5 cm and 23.5*17.5*8 cm, respectively. The pallet dimensions are 215*100*90 cm, or they can be customized according to your requirements.