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When you need to connect two threaded components without a bolt head getting in the way — joining a motor mount to a frame, securing a standoff between two panels, or assembling small furniture with hidden fasteners — a standard bolt just doesn’t work. These double end screws have metric machine threads on both ends with a smooth shank in the middle, letting you thread into two separate parts and lock them together with nuts on each side.
Made from 304 stainless steel, these hanger bolts resist rust and corrosion in humid environments, workshops, and light outdoor applications. Available in M3 × 0.5mm, M4 × 0.7mm, M5 × 0.8mm, and M6 × 1mm thread pitches, with lengths from 20mm to 250mm (approximately 0.8” to 9.8”). Each pack contains 10 pieces.
From small furniture assembly and electronics repair to RC model building, DIY brackets, and mechanical fixtures, these double end screws create clean, headless connections wherever a standard bolt head would interfere with the finished assembly.
| Thread Size | Pitch | Available Lengths | Qty per Pack |
|---|---|---|---|
| M3 | 0.5mm | 20 / 25 / 30 / 35 / 40 / 45 / 50 / 55 / 60 / 70 / 80 / 90 / 100 / 110 / 120 / 130 / 140 / 150 / 160 / 170 / 180 / 190 / 200 mm | 10 pcs |
| M4 | 0.7mm | 20 / 25 / 30 / 35 / 40 / 45 / 50 / 55 / 60 / 70 / 80 / 90 / 100 / 110 / 120 / 130 / 140 / 150 / 160 / 170 / 180 / 190 / 200 / 250 mm | 10 pcs |
| M5 | 0.8mm | 20 / 25 / 30 / 35 / 40 / 45 / 50 / 55 / 60 / 70 / 80 / 90 / 100 / 110 / 120 / 130 / 140 / 150 / 160 / 170 / 180 / 190 / 200 / 250 mm | 10 pcs |
| M6 | 1mm | 25 / 30 / 35 / 40 / 45 / 50 / 55 / 60 / 70 / 80 / 90 / 100 / 110 / 120 / 130 / 140 / 150 / 160 / 170 / 180 / 190 / 200 / 250 mm | 10 pcs |
Use M3 and M4 double end screws to secure internal components in phones, tablets, and small electronics — 304 stainless steel won’t corrode or contaminate sensitive circuits, and the headless design keeps assemblies compact.
Connect airframe panels, motor mounts, and structural members in RC aircraft, cars, and drones using M3–M5 hanger bolts — the stud design allows precise adjustment with nuts on both sides for fine-tuning alignment.
Join furniture components, mount brackets to frames, and create hidden fastener connections in small tables, shelves, and cabinets using M5 or M6 double end screws for a clean, professional finish.
| Fastener Type | Double End Screw / Hanger Bolt / Stud Bolt (Metric Thread Both Ends) |
|---|---|
| Material | 304 Stainless Steel |
| Thread Sizes | M3 × 0.5mm / M4 × 0.7mm / M5 × 0.8mm / M6 × 1mm |
| Length Range | 20 mm – 250 mm (varies by thread size) |
| Thread Type | ISO Metric Coarse Thread, both ends |
| Head Style | Headless — smooth unthreaded shank between thread ends |
| Finish | Raw stainless steel, no coating |
| Quantity | 10 pieces per pack |
| Application | Electronics, RC models, small furniture, mechanical brackets, standoff connections |
A double end screw (also called a stud bolt or hanger bolt) has metric machine threads on both ends with a smooth unthreaded shank in the middle. Unlike a regular bolt, there is no head — you thread one end into a tapped hole or nut, and the other end accepts a second nut or threaded component. This allows two separate parts to be joined without any exposed bolt head interfering with the assembly.
The standard method is the jam nut technique: thread two nuts onto one end of the bolt and lock them together tightly against each other. Use a wrench on the inner nut to drive that end into a tapped hole or threaded insert. Once fully seated, remove the jam nuts. Alternatively, use locking pliers on the smooth shank section carefully to avoid marring the surface.
Yes. 304 stainless steel is non-magnetic (in its annealed state) and does not corrode or oxidize under normal conditions, making it safe for use near electronic components. It will not introduce rust contamination or galvanic corrosion issues in most electronic assembly environments. For high-frequency RF applications, verify compatibility with your specific design requirements.
The number refers to the nominal thread diameter in millimeters. M3 (3mm) is used for small electronics, RC models, and precision assemblies. M4 (4mm) suits slightly heavier electronics and hobby builds. M5 (5mm) is common for light furniture and mechanical brackets. M6 (6mm) handles standard furniture joints and moderate load-bearing connections. Always match the bolt size to the thread size of your existing nuts or tapped holes.
Yes, for most outdoor applications. 304 stainless steel resists rust from rain and humidity well. For direct saltwater exposure or coastal environments, 316 marine-grade stainless is recommended for long-term durability. For covered outdoor use, garden furniture, and general outdoor DIY, these will perform reliably.
Both ends have metric machine threads. This is a double end screw — not a hanger bolt with a wood thread on one end. Both thread ends are standard ISO metric coarse thread, designed to accept nuts or thread into tapped holes. The smooth center shank section is unthreaded.
You will need two nuts of the matching thread size (for the jam nut installation method) and a wrench or socket to drive them. For M3 and M4, a small combination wrench or hex key set works well. For M5 and M6, a standard open-end wrench is sufficient. No special tools are required beyond what is typically found in a basic toolkit.
