Crosby McKissick 680 Construction Blocks

Product details

• Wide range of products available:
  • 5 to 100 short Tons capacity
  • 6” to 24” sheave diameter
  • 3/8” to 1-1/4” wire rope diameter
  • Larger capacity blocks available
• Equipped with genuine Crosby® forged steel Quenched & Tempered shackles that contain the patented QUICCHECK® markings.
• Design Factor of 4:1.
• All 680 Series Blocks are furnished standard with bronze bushings.
• All 680 Series Blocks 16” and larger, are furnished with McKissick® roll-forged sheaves with flame-hardened grooves.
• Sheaves are lubricated through center pin with a separate lube channel to each bearing.
• Single sheave blocks have thimble dead end.
• Manufactured by an ISO 9001 and API Q1 Certified facility.
• Marked in short tons unless metric tag requested at time of order.
• Meets or exceeds all requirements of ASME B30.26. Importantly, these blocks meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26.