Washers

Lamons furnishes several standard and special design washers based upon customer requests. By providing low friction, they improve the torque input to the bolt. They also protect the flange surface from damage while torquing the bolts. Washers are also available in many different metal materials.

Washers can be provided in different styles such as flat washers, hardened steel washers or stainless steel per the ASTM F436, compliant washers, SAE flat washers, split lock washers, spherical washers, and conical spring washers (Belleville).

» Download Washers Chart (PDF)

Plain Washers

Lamons provides Type A and Type B plain washers or special sizes. Table 1 (see PDF) provides the plain washer Type A dimensions which includes both standards: the SAE which is designated as “N” and the Standard Plate “W”.

Lock Washers

There are several styles of lock washers such as Helical Spring which it can be supplied in different styles such as regular, heavy, extra duty, and high collar. Table 2 (see PDF) includes the dimensions of the Regular Helical Spring Lock washers.

Also Lamons can provide Tooth Lock Washers which have several styles such as internal tooth, external tooth, countersunk, and other specialty designs.

Hardened Steel Washers

Lamons provides several different metal materials for hardened washers per the ASTM F436 specification. There are several styles Lamons can supply such as circular, beveled, clipped, and other specialty shapes and designed.

Table 3 (see PDF) provides the dimensions of circular and clipped circular washer.

Nord-Lock Original Washers

Nord-Lock washers secure bolted joints with tension instead of friction. It is a high quality product with documented success in many industries worldwide.
Nord-Lock wedge lock washers have been rigorously tested and approved by independent institutes as well as certification authorities. Nord-Lock wedge lock washers are used in numerous industries such as: energy, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military. Our washers are approved by several industry standards and specified by numerous international companies. Over the operational life cycle, Nord-Lock wedge lock washers give increased operational reliability and lower maintenance costs while significantly reducing the risks of production stops, accidents and warranty claims.

Nord-Lock SC Washers

Based on the leading Nord-Lock wedge-locking technology, the Nord-Lock steel construction washers (SC) are specially designed for steel construction applications and to fit HV sets and HR sets (bolts and nuts in accordance to the European standard EN 14399-4 and EN 14399-3).
Nord-Lock SC-washers are designed to directly replace standard plain chamfered washers according to EN 14399-6. The torque requirements have to be adjusted accordingly to our torque guidelines for HV bolts. Nord-Lock SC-washers are CE-marked for use with HV bolts and the safe usage with high-strength bolts has been confirmed by the General Building Supervisory Approval No. Z-14.4-629 and by the European Technical Approval 13/0246 issued by DIBT.

Nord-Lock X Series

The Nord-Lock X-series washer is an exceptional new product, giving customers extreme performance and safety, as well as the extra security of never having to risk making the wrong choice. With Nord-Lock X-series, we bring exciting new ideas to the bolt securing field that expand your design possibilities for excellent results.
New technologies and demands are creating unique design challenges. Designers need to take into account things such as thick surface coatings to fight corrosion, new sandwich composite technologies, and many more. Joints increasingly need to be able to withstand stresses from multiple fronts, including: spontaneous bolt loosening due to vibration and dynamic loads, and slackening due to settlement and relaxation.

Utilizing a unique multifunctional design, Nord-Lock X-series washers offer the highest security against both spontaneous bolt loosening and slackening. Combining Nord-Lock’s unrivaled wedge-effect solution (to prevent spontaneous loosening) with an exceptional spring effect (to compensate for loss of preload due to slackening), Nord-Lock X-series washers give you a total security option for those situations in which there can be no compromise.

If you wish to perform your own real-life testing and evaluation of Nord-Lock X-series washers for your application, please contact Lamons Engineering.