Crosby 5/8″ x 1-3/4″ S-279 Machinery Eye Bolt – 5200 lbs WLL – #9900226

The Crosby 5/8" x 1-3/4" S-279 Machinery Eye Bolt – 5200 lbs WLL is part of the Crosby eye bolt range (catalogue no. 9900226). Sealinkers supplies it from Mumbai with documentation on request.

Crosby S-279 & M-279 Machinery Eye Bolts – Forged Steel, Fatigue-Rated, In-Line Lifting Points
The Crosby S-279 (UNC) and M-279 (Metric) Machinery Eye Bolts are precision-forged lifting points designed for machinery and equipment where a secure, in-line lifting connection is required. Each bolt is forged from quenched and tempered alloy steel, fatigue rated to 1.5× its Working Load Limit (WLL) at 20,000 cycles, and meets or exceeds ASME B30.26 requirements for material traceability, proof load, ductility, and design factor.
Key Features Forged steel construction – quenched and tempered for strength and durability
Designed and rated for in-line loading only
Fatigue rated to 1.5× WLL at 20,000 cycles
5:1 design factor; maximum proof load = 2× WLL
Meets ASME B30.26 identification, ductility, and temperature requirements
Available in UNC (S-279) or Metric (M-279) thread sizes Pro Tip: Crosby Machinery Eye Bolts are supplied without nuts. These bolts are primarily designed for installation into tapped holes on machinery or equipment. When used through-bolted, nuts and washers must be added so the shoulder seats flush against the load surface. Always follow Crosby’s installation diagrams and ensure the shoulder is tight before lifting.
Specifications Model
Thread Type & Size Range
Working Load Limit (WLL)
Angular Loading Reduction S-279
UNC thread, 3/8" to 2-1/2"
1,550 – 65,000 lbs
15° = 80% WLL30° = 65% WLL45° = 30% WLL90° = 25% WLL M-279
Metric thread, M6 to M64
200 – 29,500 kg Note: Rated capacities apply to in-line loading only. For angular lifts, apply the reduction factors shown. All Crosby eye bolts are based on a 5:1 design factor and proof-tested to 2× WLL. Do not undercut the shoulder to seat flush; instead, countersink or use washers with proper inner diameter.
Thread the eye bolt fully and tighten securely against the load surface.
Inspect before use—never use if bent, elongated, or damaged.
For aluminum or dissimilar metals, avoid leaving the bolt installed long-term to prevent galvanic corrosion. Typical Applications Machinery lifting, rigging, and positioning
OEM equipment mounting points
Industrial fabrication and maintenance lifts Important: Always ensure the load is applied in the plane of the eye. Angular lifts require reduced capacity and proper shimming for alignment. Refer to Crosby’s official application and warning information for complete installation guidance.

Specifications

Prices, stock and lead times are quoted on request. Use the quote form or WhatsApp on this page, and ask for test certificates with your enquiry.