Green Pin BigMouth G-4243 Bow Shackle (Flat Nut)

The Green Pin BigMouth G-4243 Bow Shackle features an oversized bow opening that accepts wider slings, multiple sling legs, and large-diameter fittings that won't fit through a standard shackle. Secured with a flat nut pin, this shackle is built for heavy-duty rigging where maximum throat clearance is essential.

Key Features

• Oversized bow opening accommodates wide synthetic slings and multiple legs
• Flat nut pin for secure, non-rotating closure
• Forged alloy steel, quenched and tempered
• Hot-dip galvanized for superior corrosion resistance
• Individually proof tested at 2× WLL with certificate
• Meets EN 13889 Type A standard

Common Applications

• Multi-leg sling assemblies requiring wide throat clearance
• Rigging with wide-body synthetic slings and roundslings
• Marine, offshore, and heavy construction lifting
• Any application where standard shackle bow width is insufficient

Why Green Pin?

Green Pin by Van Beest is the world's leading brand of shackles and rigging hardware. Every BigMouth shackle is forged, individually proof tested, and backed by full traceability — giving riggers confidence that the connection point won't be the weak link.

Standards & Compliance

Every product we carry is individually marked with Working Load Limit (WLL), manufacturer traceability code, and country of origin. Inspection and mill certificates are available on request — email sales@slingcenter.com with your order number.

Governing Standards

• ASME B30.9 — slings (web, round, wire rope, chain) inspection and use
• ASME B30.26 — rigging hardware (shackles, eye bolts, links, turnbuckles)
• ASME B30.10 — hooks
• OSHA 1910.184 and 1926.251 — general industry and construction sling safety
• WSTDA WS-2 and RS-1 — web and round sling design
• 49 CFR 393.102 to 393.130 — DOT cargo tie-down
• NACM — welded steel chain grade specs

Inspection & Safety

Before every use: visual check for cracks, corrosion, distortion, wear, and illegible markings. Annually (minimum): documented periodic inspection by a trained inspector. Remove from service at first sign of damage. Never repair rigging hardware by welding, heating, or bending.

WARNING: Improper use of rigging can cause death or serious injury. Never exceed the rated Working Load Limit. Apply derating for side-loading, elevated temperature, or chemical exposure. Final application decisions must be made by a Qualified Person per OSHA 1926.32(m).

Chat with our AI rigging specialist

Fastest: click the Ask SlingCenter chat widget in the bottom-right of any page. Our AI specialist is available 24/7 and trained on ASME B30.9, B30.26, OSHA rigging standards, and our full catalog. It can help you size a sling, pick the right shackle, explain inspection criteria, and look up your order.

Prefer to email?

Send to: sales@slingcenter.com

Include:

• What you are lifting (shape, material, fragility)
• Load weight (lb)
• Length / reach needed
• Pick points — smooth lugs, sharp edges, or a hook?
• Environment — indoor, outdoor, heat, saltwater, chemicals?
• Quantity and timeline
• Your phone number if you want a callback

Response: AI chat instant. Email within 1 business day. Urgent orders same-day on standard configurations.