The guy hook attachment is a cast hook-shaped fitting that provides the connection point between a guy wire assembly and the pole in an overhead line guying system. Its defining feature is the open hook profile: the guy strand, thimble, or connecting clevis drops into the hook, which supports the load while allowing quick positioning during installation. This makes the guy hook attachment a favorite among line crews for down guys and span guys on wood and concrete distribution poles, where speed of assembly matters as much as holding strength.
Cast in ductile iron per ASTM A536 (typically Grade 65-45-12), the fitting delivers the combination of tensile strength and ductility required for permanent outdoor service. The hook profile is designed with a generous radius at the root to avoid stress concentration, and the closed portion of the hook retains the guy under load while the open mouth permits insertion. Hot-dip galvanizing per ASTM A153 protects the casting against corrosion for decades of exposure. Because the part is produced by sand casting, the hook opening, bolt hole size, and overall length can be adjusted to match a particular strand diameter or a utility's standard pattern—meaning replacements for legacy hardware can be reproduced exactly, and new designs can be developed from a sketch at low tooling cost.
| Parameter | Typical Value |
|---|---|
| Material | Ductile iron ASTM A536 (65-45-12) / EN-GJS-400-15 or EN-GJS-450-10 |
| Rated Load | 6,000–12,000 lbs (27–53 kN), rated to match guy strand class |
| Hook Opening | Sized for 3/8"–1/2" strand, thimble or clevis pin per drawing |
| Hole Diameter & Spacing | 11/16" or 13/16" (17.5 / 20.6 mm) bolt hole; single-hole pole mounting |
| Bolt Size | 5/8" (16 mm) machine bolt typical |
| Finish | Hot-dip galvanized per ASTM A153 |
| Suitable Guy Wire Size | 3/8", 7/16" or 1/2" EHS guy strand |
| Weight Range | 0.6–2.5 kg per piece |
| Casting Process | Green sand casting, hook profile machined or as-cast per drawing |
The guy hook attachment bolts to the pole below the communication space or at the guy lead position, usually with a 5/8" lag or machine bolt on wood poles. On concrete poles, a suitable through-bolt and anchoring arrangement is used. Field best practice is to point the hook mouth upward or along the guy lead so the strand seats fully into the hook root under tension; crews should confirm the strand or thimble cannot slide out of the mouth at the working angle before final tensioning. When a pole carries two or three guy leads at different angles, multiple hooks can be staggered vertically to avoid bolt conflicts—our combination guy hook/pole eye fittings consolidate this arrangement into a single casting where space is tight.
Sidewalk guy and head guy installations on narrow streets often pair the hook with a sidewalk strut guy fitting to keep the guy clear of pedestrian traffic. For coastal projects we can apply a heavier zinc coating; state the environment at RFQ stage.
As the casting factory, we work directly from your drawing, sketch, or sample. Hook opening diameter, hook depth, bolt hole position, and casting weight can all be modified; we regularly produce hooks matched to non-standard strand sizes or to specific thimble dimensions. Reverse-engineering service includes material verification and a first-article inspection report. Sample lead time is typically 2–4 weeks after drawing confirmation, and sample charges are credited against the first production order in most cases.
Each lot undergoes: dimensional inspection against the approved drawing; mechanical testing of companion test bars (tensile, yield, elongation per ASTM A536); hot-dip galvanizing thickness measurement; and visual inspection for surface and internal casting defects, with magnetic particle inspection available for the hook root on request. Parts are packed in export cartons on pallets, 25–50 kg per carton, with moisture-proof liners and customer-specified labeling.
1. What strand sizes does the hook accommodate?
Standard hooks are sized for 3/8" to 1/2" EHS strand or the matching thimble; custom openings can be cast to your dimension.
2. Can the hook be supplied with a closed (dead-end) eye instead?
Yes—the same body can be cast with a closed eye or with an integral eye plate; see our pole eye plate guy attachment for that variant.
3. How is the hook protected against corrosion?
All parts are hot-dip galvanized to ASTM A153; heavier coating weights are available for coastal and industrial environments.
Send your drawing or sample for a fast quotation — technical response within 24 hours. Contact our casting engineers on WhatsApp: +86 185 6156 7088 or through the inquiry form.
Need a formal quotation? Send your Guy Hook Attachment Casting drawing, quantity and target price through our quotation request form — it goes straight to the foundry inbox, and we reply with a priced offer, material certificate draft and production lead time within one business day.
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Jimo District, Qingdao City, Shandong Province, China
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