TURNBUCKLES

Hardware

are high-capacity, precision-threaded tensioning devices manufactured with hot drop-forged bodies and end fittings, engineered to deliver controlled linear tension adjustment, load stabilization, and secure length calibration in guy-wire stays, marine rigging, structural bracing, and heavy tie-down applications.

Forged carbon steel or 316 stainless steel bodies and end fittings undergo heat treatment to ensure high tensile strength and fatigue resistance under continuous strain.

Available in Jaw & Jaw (JJ), Jaw & Eye (JE), Eye & Eye (EE), and Hook & Eye (HE) end-style combinations to match shackles, pad eyes, and wire rope thimbles.

Features CNC-machined UNC right/left-hand threads providing smooth, precise take-up adjustment across standard 4-inch to 24-inch body lengths.

Manufactured, proof-tested, and certified in full accordance with ASME B30.26, ASTM F1145 (formerly Federal Specification FF-T-791b), and OSHA standards.

Class	End Fitting Combination	Material Grade & Finish	Typical Applications	Primary Advantage
Jaw & Jaw Turnbuckle (JJ)	Dual Clevis Jaw & Pin Ends	Forged Carbon Steel / Hot-Dip Galvanized	Direct Structural Rigging, In-Line Tensioning	Maximum Structural Security & Locked Clevis Pins
Jaw & Eye (JE) / Eye & Eye (EE)	Closed Eye & Clevis Jaw Options	Forged Carbon Steel / Hot-Dip Galvanized	Tower Guy Wires, Structural Bracing, Stays	Versatile Connection to Shackles & Wire Rope Eyes
Hook & Eye (HE) / Hook & Hook (HH)	Open Hook End(s) with Eye/Hook	Forged Carbon / 316 Stainless Steel	Temporary Lashing, Utility Tie-Downs (Non-Lifting)	Rapid Attachment & Quick-Release Positioning

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Model Naming & Series Documentation

Example Designation: SWR-TBK-0075-06IN-JE-HDG-EA
SWR: Brand / Supplier Identifier (Southwest Wire Rope)
TBK: Product Category (Industrial Turnbuckle)
0075: Nominal Thread Diameter (0.750 in / 3/4 in / 19 mm)
06IN: Take-Up Length (06IN = 6 in / 150 mm)
JE: End Fitting Combination (Jaw & Jaw JJ / Jaw & Eye JE / Eye & Eye EE / Hook & Eye HE / Stub End SE)
HDG: Surface Finish (Hot-Dip Galvanized HDG / 316 Stainless Steel SS / Self-Colored SC)
EA: Packaging Unit (Each EA)

Jaw & Jaw Turnbuckles (G-228 Equivalent / ASTM F1145 Type 1 Form 1 Grade 1)
- Thread Size Range: 1/4 in – 2-3/4 in (6.4 mm – 70 mm)
- Take-Up Range: 4 in – 24 in (100 mm – 610 mm)
- Capacity Range: 500 lbs – 75,000 lbs Working Load Limit (WLL)
- Primary Feature: Fitted with clevis bolts/pins and cotter pins on both ends; engineered for in-line structural tensioning where non-disengaging mechanical connections are required for overhead and critical loads
- Compliance: ASME B30.26 / ASTM F1145 / OSHA
Jaw & Eye / Eye & Eye Turnbuckles (G-227 & G-226 Equivalents)
- Thread Size Range: 1/4 in – 2-3/4 in (6.4 mm – 70 mm)
- Take-Up Range: 4 in – 24 in (100 mm – 610 mm)
- Primary Feature: Elongated eye ends easily accept shackles and wire rope thimbles, making this combination the industry standard for communications tower guy-wire tensioning, pipe rack bracing, and marine stay rigging
- Compliance: ASME B30.26 / ASTM F1145 / OSHA
Hook & Eye / Hook & Hook Turnbuckles (G-225 Equivalent)
- Thread Size Range: 1/4 in – 1-1/2 in (6.4 mm – 38 mm)
- Take-Up Range: 4 in – 18 in (100 mm – 450 mm)
- Primary Feature: Designed for temporary tie-down operations, cargo securing, and light utility tensioning where rapid attachment is required (Note: Lower WLL compared to jaw/eye models; not recommended for overhead lifting)
- Compliance: ASTM F1145 Type 1 Form 1 Grade 2

Example Designation: SWR-WSS-0300-SPA-HDG-EA
SWR: Brand / Supplier Identifier (Southwest Wire Rope)
WSS: Product Category (Web Sling Shackle WSS / Wide-Body Sling Saver WBS)
0300: Nominal Jaw Opening / Sling Web Width (0300 = 3.00 in / 75 mm)
SPA: Pin Style (Screw Pin Anchor SPA / Bolt Type Anchor BTA)
HDG: Surface Finish (Hot-Dip Galvanized HDG / Epoxy Painted Alloy EPC)
EA: Packaging Unit (Each EA)

Web Sling Shackles (Flat Spool Design)
- Sling Width Fit: 2 in – 6 in (50 mm – 150 mm web slings)
- Capacity Range: 3.25 tons – 12.5 tons Working Load Limit (WLL)
- Body Geometry: Features a wide, flat bearing spool that supports the full width of Type 3 (EE), Type 4 (EE), and Type 5 (EN) synthetic web slings
- Primary Feature: Distributes the lifting load evenly across the full width of the webbing, preventing edge bunching, severe stress concentrations, and premature webbing wear
- Compliance: ASME B30.26 / WSTDA
Wide-Body Synthetic Sling Saver Shackles (Bolt Type)
- Capacity Range: 7.5 tons – 300+ tons Working Load Limit (WLL)
- Body Geometry: Extra-wide radiused crown designed specifically for synthetic roundslings and high-capacity grommets
- Primary Feature: Increases the contact surface area between the shackle and round sling by up to 58%, eliminating the need for WLL capacity reductions and protecting internal load-bearing core fibers from pinching
- Compliance: ASME B30.26 / WSTDA / OSHA
Heavy-Duty Alloy Offshore Sling Shackles
- Capacity Range: Up to 500+ tons WLL
- Pin Termination: Heavy hex bolt, nut, and stainless steel cotter pin locking system
- Primary Feature: Engineered for heavy offshore module lifts using high-modulus HMPE or polyester rope grommets; equipped with smooth, extra-large radii to maximize rope strand longevity during heavy lifts
- Compliance: ASME B30.26 / DNV / OCIMF Approved Options