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| Crosby Rigging Screws (Straining Screws)Online Catalogue | Lifting Gear, Ropes, Pulleys, Shackles & Nicopress | Rigging Screws | Crosby Rigging Screws (Straining Screws) Crosby Rigging Screws (Straining Screws)Made from hot dip galvanised steel, the end fittings are quenched and tempered. Eyes are elongated to facilitate fitting. The length specified for straining screws is the maximum take up of the item shown as BB, in the illustration below. The proof load is twice the working load limit and the ultimate load is five times the WLL.
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To USA Federal specification FF-T-791b Type 1 Form 1 Class 4. Ensure that the straining screws are used for a straight in line pull only. | | To USA Federal specification FF-T-791b Type 1 Form 1 Class 8. Ensure that the straining screws are used for a straight in line pull only. | | To USA Federal specification FF-T-791b Type 1 Form 1 Class 8. Ensure that the straining screws are used for a straight in line pull only. | | | | |
Online Catalogue | Lifting Gear, Ropes, Pulleys, Shackles & Nicopress | Rigging Screws | Crosby Rigging Screws (Straining Screws) | 
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