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Hanger bolts are double-ended fasteners designed with wood screw threads on one side and machine threads on the other, enabling secure connections between wooden structures and metal assemblies. They are widely used in furniture manufacturing, solar panel mounting systems, HVAC installations, and structural woodworking where reliable load transfer is essential. Manufactured in stainless steel, carbon steel, and alloy steel variants, hanger bolts conform to international standards such as DIN and ISO equivalents depending on application requirements.
These fasteners play a critical role in ensuring vibration-resistant, long-lasting joints in hybrid material assemblies. Their dual-thread design eliminates the need for through-bolting, improving installation efficiency in confined or pre-drilled wood applications. KK Fasteners supplies precision-engineered hanger bolts to OEMs and industrial buyers across global markets, supporting both standard and custom specifications with full material traceability.
| Parameter | Specification |
|---|---|
| Material Options | Stainless Steel (SS 304, SS 316), Carbon Steel, Alloy Steel |
| Grade | A2 / A4 Stainless, 4.6 / 8.8 / 10.9 Carbon Steel |
| Size Range | M4 to M20 / 3/16" to 3/4" |
| Thread Type | Metric ISO, UNC, UNF |
| Standards | DIN Equivalent, ISO 898-1, BS, JIS (application-based) |
| Surface Finish | Plain, Zinc Plated, Hot Dip Galvanized, Nickel Plated |
| Type Variants | Standard hanger bolt, custom double-ended screw |
| Tensile Strength | Up to 1000 MPa (based on grade selection) |
| Hardness | 20–35 HRC (depending on material grade) |
| Length (B) |
Machine Thread Length (C) |
Wood Thread Length (D) |
|---|---|---|
| 1/4-20 (A) | ||
| 2 | 1 | 1 |
| 2-1/2 | 1 | 1-1/2 |
| 3 | 1-1/2 | 1-1/2 |
| 3-1/2 | 1-1/2 | 2 |
| 4 | 2 | 2 |
| 5/16-18 (A) | ||
| 2 | 1 | 1 |
| 2-1/2 | 1 | 1-1/2 |
| 3 | 1-1/2 | 1-1/2 |
| 3-1/2 | 1-1/2 | 2 |
| 4 | 2 | 2 |
| 3/8-16 (A) | ||
| 3 | 1-1/2 | 1-1/2 |
| 3-1/2 | 1-1/2 | 2 |
| 4 | 2 | 2 |
| 5 | 2-1/2 | 2-1/2 |
| 6 | 2-1/2 | 3-1/2 |
| 1/2-13 (A) | ||
| 3 | 1 | 2 |
| 3-1/2 | 1-1/2 | 2 |
| 4 | 2 | 2 |
| 6 | 2-1/2 | 3-1/2 |
| Diameter | Length | Thread | Machine | Lag | #/m |
|---|---|---|---|---|---|
| 6-32 | 5/8 | Full | 1/4 | 3/8 | 2.0 |
| 6-32 | 3/4 | Full | 3/8 | 3/8 | 2.0 |
| 6-32 | 7/8 | Full | 1/4 | 5/8 | 3.0 |
| 6-32 | 1 | Full | 3/8 | 5/8 | 3.0 |
| 6-32 | 1 1/4 | Full | 5/8 | 5/8 | 4.0 |
| 6-32 | 1 1/2 | Full | 7/8 | 5/8 | 5.0 |
| 6-32 | 2 1/2 | Full | 1 1/2 | 1 | 7.0 |
| 8-32 | 5/8 | Full | 1/4 | 3/8 | 3.0 |
| 8-32 | 3/4 | Full | 3/8 | 3/8 | 3.0 |
| 8-32 | 7/8 | Full | 1/4 | 5/8 | 4.0 |
| 8-32 | 1 | Full | 3/8 | 5/8 | 4.0 |
| 8-32 | 1 1/4 | Full | 5/8 | 5/8 | 5.0 |
| 8-32 | 1 1/2 | Full | 5/8 | 7/8 | 6.0 |
| 8-32 | 1 3/4 | Full | 3/4 | 1 | 7.0 |
| 8-32 | 2 | Full | 1 | 1 | 8.0 |
| 8-32 | 2 1/2 | Full | 1 | 1 1/2 | 11.0 |
| 10-24 | 7/8 | Full | 1/4 | 5/8 | 4.0 |
| 10-24 | 1 | Full | 3/8 | 5/8 | 6.0 |
| 10-24 | 1 1/4 | Full | 5/8 | 5/8 | 7.0 |
| 10-24 | 1 1/2 | Full | 5/8 | 7/8 | 8.0 |
| 10-24 | 1 3/4 | Full | 3/4 | 1 | 9.0 |
| 10-24 | 2 | Full | 1 | 1 | 11.0 |
| 10-24 | 2 1/2 | Full | 1 | 1 1/2 | 13.0 |
| 10-24 | 3 | Full | 1 1/2 | 1 1/2 | 16.0 |
| 10-24 | 3 1/2 | Full | 1 1/2 | 2 | 19.0 |
| 10-32 | 3/4 | Full | 3/8 | 3/8 | 6.0 |
| 10-32 | 1 | Full | 3/8 | 5/8 | 6.0 |
| 10-32 | 1 1/4 | Full | 5/8 | 5/8 | 8.0 |
| 10-32 | 1 1/2 | Full | 5/8 | 7/8 | 9.0 |
| 1/4-20 | 1 | Full | 3/8 | 5/8 | 9.0 |
| 1/4-20 | 1 1/4 | Full | 5/8 | 5/8 | 12.0 |
| 1/4-20 | 1 1/2 | Full | 5/8 | 7/8 | 14.0 |
| 1/4-20 | 1 3/4 | Full | 3/4 | 1 | 16.0 |
| 1/4-20 | 2 | Full | 1 | 1 | 19.0 |
| ASME B18.2.1 | 3/8 inch to 3 inch |
| BS 1769 | ½ inch to 2 inch |
| ASME B18.2.3.6M | M12 to M36 |
| ASME B18.2.3.7M | M16 to M36 |
| DIN 6914 | M12 to M36 |
| ISO 7412 | M12 to M36 |
| UNI 5712 | M12 to M36 |
| DIN EN 14399-4 | M12 to M36 |
| Sizes | Size chart | Size guide | Dimensions |
| 3/8-16 x 1 Grade 5 Finish | 1/2-13 x 1-1/2 Grade 5 Finish | 1/4-20 x 1 Grade 5 Finish | |
| 3/8-16 x 1-1/4 Grade 5 Finish | 3/8-16 x 1-1/2 Grade 5 Finish | 1/4-20 x 3/4 Grade 5 Finish | |
| 1/2-13 x 2 Grade 8 Yellow Finish | 1/2-13 x 2 Grade 5 Finish | 1/2-13 x 1-1/2 Grade 8 Yellow Finish | |
| 5/8-11 x 2 Grade 8 Yellow Finish | 1/4-20 x 3/4 Grade 18-8 Stainless Steel | 5/16-18 x 1 Grade 5 Finish | |
| 3/8-16 x 1 Grade 8 Yellow Finish | 3/8-16 x 1 Grade 18-8 Stainless Steel | 3/8-16 x 1-1/2 Grade 8 Yellow Finish | |
| 1/4-20 x 1 Grade 18-8 Stainless Steel | 5/8-11 x 2 Grade 5 Finish | 5/8-11 x 2-1/2 Grade 8 Yellow Finish | |
| 3/8-16 x 2 Grade 5 Finish | 3/8-16 x 1-1/4 Grade 8 Yellow Finish |
Hanger bolts are used wherever a strong wood-to-metal or composite fastening solution is required in structural and semi-industrial assemblies.
Hanger bolts are manufactured using cold forging and precision thread rolling to ensure consistent dimensional accuracy and structural integrity. The wood screw end is shaped for optimal grip in timber substrates, while the machine-thread end is precision-formed for nut engagement.
Each batch undergoes strict quality control including dimensional inspection, thread gauge verification, hardness testing, and surface coating validation. Traceability is maintained through heat number tracking and batch-level documentation. KK Fasteners ensures compliance with ISO 9001 quality systems, with optional RoHS and REACH compliance for export requirements. Every component is inspected before dispatch to ensure mechanical reliability in industrial applications.
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Hanger bolts are double-ended fasteners with wood screw threads on one side and machine threads on the other. They are designed to connect wood components to metal parts without through-bolting, providing a strong and stable joint in furniture, construction, and industrial assemblies.
They are commonly manufactured from stainless steel (SS 304, SS 316), carbon steel, and alloy steel. Stainless steel is preferred for corrosion resistance in outdoor or marine environments, while carbon steel grades are used for high-strength indoor applications.
Hanger bolts are generally produced in compliance with ISO 898-1 for mechanical properties and DIN equivalent specifications depending on application requirements. Some projects may also follow BS or JIS standards based on regional engineering needs.
Selection depends on load requirements, environmental conditions, and base material. Stainless steel is ideal for corrosion-prone environments, while high-strength carbon steel is suitable for structural indoor applications requiring higher tensile performance.
Look for manufacturers with ISO certification, material traceability, consistent quality inspection processes, and proven export capability. KK Fasteners supplies hanger bolts globally with full technical documentation and support for OEM and industrial requirements.
Precision-engineered hanger bolts require strict control over thread geometry and material consistency to ensure structural reliability in hybrid assemblies. KK Fasteners supports industrial buyers with custom specifications, export-grade quality control, and engineering-backed fastening solutions for global applications.
To request technical drawings, pricing, or bulk supply details, contact KK Fasteners for a detailed quotation and application-specific support from the engineering team.
