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Sems Fasteners
Sems threaded fasteners are assemblies that combine fasteners with washers, collars, specialized stampings, or other components.
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- Single component assembly
- Wide variety of component and fastener styles available
- Sizes from M1 to M12 (#00 to 5/8")
- Components are captivated onto the fastener
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- Eliminates hand assembly of washers
- Increases production; ensures product integrity
- Assures proper fastener and washer match
- Simplifies purchasing and inventory control
- Eliminates lost, dropped, or forgotten washers
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CREST CUPTM Fasteners
CREST CUP fasteners are sems spring-washer assemblies.
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- Burr-free bearing surface
- Pre-assembled fastener and washer combination
- Wide variety of head and thread styles
- Sizes from M2 to M10 (#2 to 5/16")
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- Provides maximum joint integrity
- Retains spring returnability
- Reduces tension loss
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Miniature Fasteners
Screws are made in sizes as small as M0.6 or #000.
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- Miniature sems available
- Lengths down to 3 pitch
- Diameters as small as M0.6 or #000
- Cold formed
- Wide variety of shapes, styles and materials
- Thread-formers for metals and plastics are available
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- Reduces costs over screw machined fasteners
- Allows product downsizing
- Reduces assembly costs and problems
- High-quality manufacturing processes
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Taptite® Fasteners Technical Data
Taptite fasteners roll-form threads as they are driven.
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- Tri-lobular thread form
- Sizes from M1.6 to M16 (000-90 to 5/8"-11")
- SPC provides a controlled process
- Tight dimensional tolerance controls
- Consistent thread profile
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- Eliminates tapping costs
- Resists vibration loosening to IFI-124 and 524 standards
- Lower, more consistent drive torque
- Excellent drive-to-fail ratio
- Generates strong mating threads
- Eliminates cross-threading
- High prevailing torque
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Plastite® Fasteners Technical Data
Plastite thread-forming screws are used for fastening plastics.
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- 45 degree thread profile for engineered and thermoset plastics
- Diameters from M0.82 to M8.51 (#000 to 5/16")
- Steep helix angle
- 48 degree thread profile for thermoplastics
- Tri-lobular thread form
- Twin or single helix
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- Eliminates tapping costs
- Resists vibration loosening
- Minimal radial stress reduces boss failure
- Eliminates inserts
- Generates strong mating threads
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PT® Fasteners
PT Screws are thread-forming screws for assembling thermoplastics.
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- Sizes from M1.5 to M10
- 30 degree profile
- 8 degree helix
- Symmetrical threads
- Core recess at minor diameter
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- Allows thinner bosses to be designed
- Reduces radial stress
- Maximizes clamp load retention
- Resists relaxation and vibration loosening
- Lowers installation torque
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Duro-PT® Fasteners
Duro-PT screws are thread-cutting screws for thermoset plastics.
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- 4 degree angle
- Sizes from M2.2 to M8
- 30 degree flank angle
- Shank slot
- Asymmetrical threads
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- Eliminates the need for supplemental locking devices such as adhesives or inserts
- Maintains clamp load retention
- Offers high strip-out torques
- Resists vibration loosening
- Reduces stress on bosses
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