Products with Captivated Washers, Sleeves, or other Components
Lowers cost by eliminating hand assembly of washers
Assures proper washer and fastener compatibility
Parts consolidation opportunities
Diameter: M2.2 - M16 (2" - 5/8")
Length: 5mm - 127mm (3/16" - 5")
Thread Length: 101mm (4") Maximum
Longer lengths upon request
Flat
Conical
Split Lock
Internal Tooth
External Tooth
Semblex Square Dome®
Crest Cup™
Square
Fairing
Finishing
Wave
Sealing
Non-Metallic
Multi-Washer
Specials
Staked Stampings
Retained Specialized Components
Thread Protection Sleeves
Rubber Molded Heads
O-Ring Assembly
The word Sems signifies the concept of washers that are pre-assembled onto a screw or bolt. The washer is held captive but free-spins, allowing for its intended functional design. Sems are not limited to a single washer assembly but can also consist of multiple washers in dissimilar configurations. They can range in diameters, lengths, head styles, and materials.
Sems can use different washer types, allowing for a wide variety of application needs, ranging from preventing vibrational loosening in the joint to developing a proper clamping surface and even improving the cosmetic appearance of the product.
They can help save direct labor costs by increasing assembly speed efficiencies. The assembly/reassembly conditions support their intended functional performance because no dropped or lost washers are present. Simplifying combined part numbers within a database can help engineering and buying goals.
Sems are intended to lower total assembly costs.
