When choosing an M14 x 2 bolt, look for high-strength carbon steel, durable finishes, and precise threading that ensures a secure fit. This guide highlights five reliable options suited for automotive, construction, and DIY projects. Each product targets different needs—whether you want full-thread bolts for maximum grip or flange bolts for easier load distribution. Read on to identify which bolt is best for your application, garage to workshop. A quick buyer’s table follows to compare core specs at a glance.
| Product | Thread | Length | Grade | Finish | |
|---|---|---|---|---|---|
| Yinpecly M14 Hex Bolts | M14 x 2.0 | 150 mm | Grade 8.8 | Black oxide | Full thread |
| uxcell M14 Flange Bolts | M14 x 2.0 | 40 mm | Grade 10.9 | Black oxide | Partial thread with flange |
| Tayffency M14 Hex Bolts | M14 x 2.0 | 150 mm | Grade 8.8 | Black oxide | Full thread |
| Glvaner M14 Flange Bolt | M14 x 2.0 | 80 mm | Grade 10.9 | Black oxide | Partial thread with flange |
| Additional M14 2.0 Hardware | M14 x 2.0 | Varies | Grade 8.8 | Black oxide | Mixed |
Yinpecly M14 Hex Bolts, 2-Pack
The Yinpecly bolts are full-thread M14 x 150 mm with a hex head, made from carbon steel Grade 8.8 and finished in black oxide. They offer high hardness, corrosion resistance, and wear resistance suitable for harsh settings. These are best for projects needing strong, continuous thread engagement and a compact head profile. The precise thread and dimensions reduce slippage and improve reliability. Best for heavy machinery assembly, outdoor framing, or automotive repairs where full-thread grip is crucial. Caution: the longer length requires deeper clearance; ensure your nut and hole depth accommodate 150 mm.
uxcell M14-2x40mm Hex Serrated Flange Bolts
uxcell offers M14 x 40 mm flange bolts with a 2 mm pitch and 10.9 grade carbon steel, finished in black oxide. The flange provides washers-like load distribution, reducing the risk of head pull or loosening in vibration-heavy applications. These are better for projects requiring a larger bearing surface, such as railings, home appliances, or machinery assemblies. Best for rapid, stable fastening in environments where flange seating is advantageous. Limitation: shorter length means less thread engagement for thick materials.
Tayffency M14x2.0 Hex Bolts, 150mm
The Tayffency bolts are full-thread M14 x 150 mm, made from Grade 8.8 carbon steel with a black oxide finish. They feature clean threading and robust hex sockets for easier driving and secure engagement. Suitable for automotive or industrial assemblies requiring strong, continuous-thread fasteners. Choose this option if you need long reach with consistent thread engagement and a smooth installation. Caution: ensure the knob or tool fits the hex size comfortably to avoid rounding the head during driving.
Glvaner M14-2.0 x 80mm Flange Bolt
This Glvaner bolt features a partial thread and a 21 mm hex drive, using 10.9 grade alloy steel with a black oxide finish. It combines higher strength with a flange to spread load in automotive, machinery, and construction applications. Best for projects needing reliable flange support and a shorter, manageable length. A limitation is that partial thread may reduce grip on very soft materials; verify material thickness before use.
Buying Guide
Key considerations for choosing M14 x 2 bolts
Purpose and environment matter. For heavy-duty, high-stress connections, opt for Grade 8.8 or 10.9 bolts with full thread and longer length. If load distribution is critical, flange bolts offer a larger bearing surface. Finish choices like black oxide provide corrosion resistance but do not replace protective coatings in highly aggressive environments.
Thread length vs. material thickness
Full-thread bolts deliver uniform engagement along the shaft, ideal for materials with consistent thickness. Partial-thread bolts concentrate gripping strength near the head and are useful when thinner sections require a snug fit.
Head style and drive compatibility
Hex heads are standard for power tools and manual wrenches. Ensure the hex size matches your driver to avoid stripping. Flange bolts can reduce the need for washers, aiding in alignment and vibration resistance.
Corrosion and temperature considerations
Black oxide finishes offer moderate corrosion resistance and are cost-effective. In harsh or outdoor settings, consider additional protective coatings or stainless alternatives if compatibility allows.
Practical selection checklist
- Confirm thread pitch and diameter match your nut and tapped hole.
- Match bolt length to material thickness plus clearance for nuts and washers.
- Choose Grade 8.8 or 10.9 for higher tensile strength.
- Decide between full-thread and partial-thread based on engagement needs.
- Consider flange bolts when load distribution matters.
Common use cases
- Automotive assemblies with heavy vibration
- Machine tool construction and repair
- Racking, frames, and structural DIY projects
- Guardrails, enclosures, and equipment mounting
FAQ
- What does M14 x 2 mean?
It refers to a bolt with a 14 mm diameter and a 2.0 mm thread pitch. - When should I use full-thread vs partial-thread bolts?
Full-thread is best for uniform grip; partial-thread is better when the engagement is critical at the head and easier to tighten into thicker materials. - Are flange bolts better for vibration resistance?
Yes, flanges distribute load and can reduce loosening under vibration. - Is black oxide finish sufficient for outdoor use?
Black oxide offers basic corrosion resistance; for severe exposure, consider additional coatings or stainless alternatives. - What grade bolt should I choose for high strength?
Grade 10.9 offers higher strength than Grade 8.8; choose based on load requirements and safety factors.