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Expandable Diameter Fasteners

Expandable diameter fasteners are custom-engineered to expand in a hole to prevent fretting. These unique fasteners can eliminate the need for expensive close tolerance machining or press fits. Typical applications include: aircraft engine mounting, helicopter blade attachment, mounting of anti-friction bearings, and redesigns requiring a tighter joint. The heart of the fastener is the expandable bushing stack of alternating tapered split bushings. When a compressive force is applied to the ends of the bushing stack, the diameter of the fastener increases. When the force is relaxed, the bushings return to their original diameter, and the fastener can easily be removed and reused. The family of expandable diameter fasteners include: bolts, blind bolts, shafts, and cam-operated pins.

SL50XXX NSN1560  
SLT50015 NSN1615  
SL51XXX NSN1680  
SL52XXX NSN1730  
SL531XXX NSN2590  
SL54XXX NSN5306  
SL55XXX NSN5315  
  NSN5340  
SL50101 EXPANDABLE DIAMETER  
SLT50015 INSTALLATION TOOL FOR EXPANDABLE BOLTS AND SHAFTS  
SL51101 - EXPANDABLE DIAMETER -BLIND BOLT  
SL52101 - EXPANDABLE DIAMETER- SHAFT  
SL52101 - EXPANDABLE DIAMETER- SHAFT-CLAMP-UP BOLT  
SL52101 PIN EXPANDABLE DIAMETER-CAM ACTUATED  

Expandable Diameter Fasteners Features and Benefits

Expandable Dia Bolts
Expandable Dia Blind Bolts
Expandable Dia Shafts
Expandable Dia Clamp-Up Bolts
Expandable Dia Pin
Expandable Dia Handleless Cam
Expandable Dia Wrap-Around Cam