Lock washers are a very popular locking choice especially with smaller-sized fasteners. Essentially, there are two types: spring action and tooth. Spring action washers include split, conical (Belleville) and wave. These washers, placed under the nut or screw head, compress as the fastener is tightened and the spring-back tension deters loosening.

The Double Coil helical spring split lock washer is used in soft joints, such as wooden pole line assemblies, that are subject to considerable expansion and contraction. The Double Coil provides the travel necessary to maintain effective clamping force in such assemblies.

Aug 30,  · “The typical helical spring washer serves as a spring while the bolt is being tightened. However, the washer is normally flat by the time the bolt is fully torqued. At this time

Sep 22,  · The best bet is to use a very hard washer and a grade 8 bolt and a high torque; about 80% of yield strength. Since the end of the bolt can be accessible (leave the cap off) you may be able to put a micrometer over the length of the bolt to measure its elongation directly. EdStainless (Materials) 22 Sep 17 16:21 No lock nut on the back?

Hardness. Carbon & High-Alloy Steel: Rockwell C38 - 46. Stainless: Thru 5/8": Rockwell C35 - 43; Sizes over 5/8": Rockwell C32 - 43. Twist Test. With the washer in a vice with the split ends free and directly above the vice jaws, a 90 Degree section of the free end is

Washers are normally used to distribute loads of threaded bolts, screws, and nuts evenly as the fastener is tightened. Split washers are not to be used in 

Lock washers, also referred to as split washers, are used to prevent nuts and bolts from slipping or turning in applications. The washer applies a light load to minimize the effects of vibration, keeping the nut and bolt tightly in place. Lock washers are typically manufactured from low-cost materials to take up tolerances.

Split washers or helical spring washers, work in a similar way to a wave washer. Some claim that they provide a locking action by digging into 

They are relatively lightweight, producing quite low preload forces. Split washers or helical spring washers, work in a similar way to a wave washer. Some claim that they provide a locking action by digging into the bearing faces but, in reality, these are typically too hard for this to produce any noticeable effect.

Compared to standard split lock washers, these are thicker and have larger outside diameters. Spring Lock Washers for Slotted Bearing Nuts Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle.

Item Spring Lock Washer; Lock Washer Type Split Lock; Finish Zinc Yellow; Material Alloy Steel; For Screw Size 5/16 in; Inside Diameter 0.314 in; Outside Diameter 0.583 in; Maximum Thickness 0.078 in; Minimum Thickness 0.078 in; Color Yellow; Dimensional Standards ASME B18.22.1; Inside Diameter Tolerance +/-0.005 in; Made in North America No