摘要 |
<p>A fastening system including a two piece swage type fastener (10) including a pin (12) and a collar (14) in which the pin (12) has relatively wide lock grooves (26) and in which the lock grooves (26) have a generally smooth root contour with the collar (14) having a shank portion (69) with a wall thickness defining an excess volume of material prior to swage greater than the volume of the confronting lock grooves (26) and with the clearance between the inside diameter (ID) of the collar shank portion (69) and the diameter (Du) of crests (71) of the lock grooves (26) being a minimum to reduce the compressive force required to swage the collar shank (69) into the lock grooves (26) and with the excess volume of collar shank (69) material providing only a partial fill of the lock grooves (26) upon swage.</p> |