TEC Series® washers keep joints secure using tension, not friction as with traditional washers. TEC washers consist of a pair of washers with cams on one side and seizing ridges on the other. The cam sides are mated together with a mild adhesive, and installed between the bolt head or nut and the joint material.

As the bolt or nut is tightened, the seizing ridges cause one half of the washer to be seated to the bolt or nut, while the other half is seated to the joint material.

Features and Benefits
  • Heavy-duty, self-locking design
  • For use with bolts up to Class 10.9, Grade 8
  • Available in sizes from #8 (M4) to 1-3/8" (M36)
  • Available in 316L Stainless Steel
  • Provided in preassembled glued pairs
  • Easy to install with standard tools
  • No retightening needed after installation
  • Reusable
  • Vibration proof according to MIL-STD-1312-7
Quality and Traceability
TEC Series® washers are thoroughly tested in several stages of production to ensure a high level of quality Sherex customers have come to expect. Each TEC Series® washer is laser etched with a production lot number, part size, and coating to enable full traceability and easy identification.

TEC Series® washers are manufactured in an ISO-Certified Facility and are fully RoHS compliant.

Installation
  • To install the TEC Series® Washer, place the preassembled pair between the nut or bolt and the joint material.
  • As the nut or bolt is tightened, one half of the washer pair will be seated to the joint material and the other half will be seated to the nut or bolt.
  • Install TEC Series® washers using standard tools according to TEC Series Torque Guidelines. Retightening is not needed.
  • The use of lubricants is highly recommended when installing TEC Series® washers. A high quality lubricant designed to prevent seizing will reduce friction during installation and improve the consistency of clamp load in joints.
Torque Guidelines
When installing TEC Series® Washers in a common application, expect an increase in required torque over recommended installation torque to achieve proper clamp load and maximum joint safety. Due to varying installation conditions and customer specific applications, additional information and torque recommendations are available by contacting Engineering support at Sherex.

Removal and Reuse
Removing TEC Series® washers requires no special tools or procedure. Simply untighten the joint in the normal method and check the washer to ensure cam faces disengage.

While TEC Series® washers are usually reusable, washers should always be inspected for deformation or excessive wear before reuse. If washers appear deformed or heavily worn, discard and use a new pair.

Application Examples
TEC Series® wedge locking washers can be used to protect joint integrity in a wide variety of joint types, including:
Tapped Hole
Counter Bore
Stud Bolt
Large Hole (For large/slotted holes and painted or soft contact surfaces, use Enlarged OD TEC Series Washers)

TEC Series® wedge locking washers are not recommended for mating surfaces that are not locked in place or are harder than the washers. TEC Series washers are not recommended for use in non-preloaded joints.

Proven Applications
TEC Series® Wedge Locking Washers outperform conventional, split-ring, and other style washers in a wide variety of high stress, corrosive, and vibration-sensitive applications including:
  • Agriculture Equipment
  • Automotive
  • Construction Equipment
  • Heavy Rail
  • Aerospace and Defense
  • Mining and Drilling Equipment
  • HVAC
  • Solar and Wind
  • Waste Management
Proven Results
TEC Series® Wedge Locking Washers have been tested on a Junker Vibration Machine. The Junker test, considered the most severe vibration test for bolted joints, is used to determine the point at which a bolted joint loses its preload when subjected to shear loading due to transverse vibration.

When tested against a standard washer using the Junker test, TEC Series® wedge locking washers remained secure under severe vibration conditions, while the standard washer loosened significantly.

Additional Information
When the joint experiences vibration, the bolt or nut attempts to loosen. Since one half of the washer is seated to the bolt or nut, it attempts to rotate as well.

Because of the cam angle (α) of the washers is greater than the thread pitch (ß) of the bolt, a wedge effect is created by the cams, preventing the bolt or nut from rotating loose. Clamp load is maintained and the joint remains secure.

Note
Weight and thickness of pairs will vary slightly with gauge of metal.
Coated in Delta Protekt® KL100 and V H302 GZ.
Custom designs available.

Sold in full cartons only. Less than full carton quantities are available for purchase through TEC Series Distributors.
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Item #

Item Name

Inner Diameter (A)

Outer Diameter (C)

Thickness (EE)

Box Quantity

Carton Quantity

3D CAD

TEC-M4ss N/A TEC Series® 0.173 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.173 in4.4 mm N/A 0.299 in7.6 mm N/A 0.087 in2.2 mm N/A 200 N/A 12800 N/A
TEC-M5ss N/A TEC Series® 0.213 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.213 in5.4 mm N/A 0.354 in9.0 mm N/A 0.087 in2.2 mm N/A 200 N/A 12800 N/A
TEC-M6ss N/A TEC Series® 0.256 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.256 in6.5 mm N/A 0.425 in10.8 mm N/A 0.087 in2.2 mm N/A 200 N/A 12800 N/A
TEC-1/4ss N/A TEC Series® 0.283 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.283 in7.2 mm N/A 0.453 in11.5 mm N/A 0.087 in2.2 mm N/A 200 N/A 6400 N/A
TEC-M8ss N/A TEC Series® 0.343 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.343 in8.7 mm N/A 0.531 in13.5 mm N/A 0.079 in2.0 mm N/A 200 N/A 6400 N/A
TEC-3/8ss N/A TEC Series® 0.406 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.406 in10.3 mm N/A 0.654 in16.6 mm N/A 0.079 in2.0 mm N/A 200 N/A 3200 N/A
TEC-M10ss N/A TEC Series® 0.421 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.421 in10.7 mm N/A 0.654 in16.6 mm N/A 0.079 in2.0 mm N/A 200 N/A 3200 N/A
TEC-7/16ss N/A TEC Series® 0.45 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.45 in N/A 0.73 in N/A 0.09 in N/A 200 N/A 3200 N/A
TEC-M12ss N/A TEC Series® 0.512 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.512 in13.0 mm N/A 0.768 in19.5 mm N/A 0.079 in2.0 mm N/A 200 N/A 3200 N/A
TEC-1/2ss N/A TEC Series® 0.531 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.531 in13.5 mm N/A 0.768 in19.5 mm N/A 0.079 in2.0 mm N/A 200 N/A 3200 N/A
TEC-M14ss N/A TEC Series® 0.598 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.598 in15.2 mm N/A 0.906 in23.0 mm N/A 0.118 in3.0 mm N/A 100 N/A 800 N/A
TEC-M16ss N/A TEC Series® 0.669 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.669 in17.0 mm N/A 1.000 in25.4 mm N/A 0.118 in3.0 mm N/A 100 N/A 800 N/A
TEC-M18ss N/A TEC Series® 0.768 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.768 in19.5 mm N/A 1.142 in29.0 mm N/A 0.126 in3.2 mm N/A 100 N/A 800 N/A
TEC-3/4ss N/A TEC Series® 0.787 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.787 in20.0 mm N/A 1.209 in30.7 mm N/A 0.126 in3.2 mm N/A 100 N/A 800 N/A
TEC-M20ss N/A TEC Series® 0.843 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.843 in21.4 mm N/A 1.209 in30.7 mm N/A 0.118 in3.0 mm N/A 100 N/A 800 N/A
TEC-7/8ss N/A TEC Series® 0.92 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.92 in N/A 1.36 in N/A 0.13 in N/A 100 N/A 400 N/A
TEC-M24ss N/A TEC Series® 0.996 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 0.996 in25.3 mm N/A 1.535 in39.0 mm N/A 0.126 in3.2 mm N/A 100 N/A 400 N/A
TEC-1 ss N/A TEC Series® 1.1 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 1.1 in N/A 1.54 in N/A 0.13 in N/A 100 N/A 400 N/A
TEC-M27ss N/A TEC Series® 1.118 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 1.118 in28.4 mm N/A 1.654 in42.0 mm N/A 0.268 in6.8 mm N/A 50 N/A TBD N/A
TEC-M30ss N/A TEC Series® 1.236 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 1.236 in31.4 mm N/A 1.850 in47.0 mm N/A 0.268 in6.8 mm N/A 50 N/A TBD N/A
TEC-M33ss N/A TEC Series® 1.354 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 1.354 in34.4 mm N/A 1.909 in48.5 mm N/A 0.268 in6.8 mm N/A 25 N/A TBD N/A
TEC-M36ss N/A TEC Series® 1.472 Inch (in) Inner Diameter (A) 316L Stainless Steel Washer N/A 1.472 in37.4 mm N/A 2.165 in55.0 mm N/A 0.268 in6.8 mm N/A 25 N/A TBD N/A
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