Sems Screw

Washers are often used in combination with screws to improve the structural integrity of an assembly. Typically, they are separate components. However pre-assembled screws and washers – the SEMS screw, have simplified and improved efficiencies in many manufacturing processes.

A SEMS Screw is a generic term used to describe a screw pre-assembled with a free-spinning lock washer. It is a permanent assembly with the washer held in place by the major diameter of the screw thread being larger than the hole of the washer. The SEMS screw is simple, easy to use and available in many different styles making it well suited for many applications.

It is also known as Screw with Washer assemblies, Terminal Screws, Self Lifting Washer Screw, Screw with Integrated Washers, Captive Screw, Self Lifting Washer Assembly Screws, Sems Fasteners, Sems Machine Screw, Sems Bolt etc.

Advantages of the SEMS Screw :

Low cost and widely available
Increases productivity by eliminating hand assembly of individual components
Permanent assembly assures that the washer is not dropped, lost or forgotten
Ease of use with hand drivers and in automated production programs
Available in most screw and washer combinations

Material :

Mild Steel (MS)
Brass
Stainless Steel
Copper
Silicon Bronze
Phosphate Bronze

Thread :

2 MM to 8mm
1/8 to 5/16
8 BA to 2 BA

Length :

4 MM to 150 MM
3/16” to 6”

Threads :

ISO Metric (MM Threads)
BSW Threads (Inches)
BA Threads
BSF Threads
Any threads as per design.

Standards :

Finishing :

Nickel Plating
Trivalent Passivation
Chrome Plating
Tin Plating
Copper Plating
Blue Yellow White Black Zinc Plating
Silver Plating
Gold Plating
Brass Plating
Any other coating as per customer requirements

Any types of Screw can be developed as per customer’s requirement & specifications