Avoid delays, rework, and jobsite frustration by getting these details right the first time.
Custom anchor bolts are critical components in concrete and structural connections — and when they’re fabricated correctly, they perform flawlessly. But a small oversight in your order specs can lead to costly delays, misfits in the field, or compliance issues down the line.
At Threadline, we’ve seen it all. Here are the top mistakes to avoid when ordering custom anchor bolts, and tips to make sure your fasteners are made right the first time.
1. Incorrect or Missing Thread Lengths
One of the most common errors in anchor bolt orders is specifying the wrong thread length — or forgetting to specify it at all.
Why It Matters:
The exposed thread length affects how the bolt connects to base plates, structural steel, or equipment. Too short, and it won’t engage enough threads. Too long, and you risk thread interference or nut misalignment.
Tip:
Always confirm how much thread is required above the concrete and whether threading should extend below the surface for double-ended or through-bolt applications.
2. Unclear or Missing Bend Specifications
When ordering L-bolts, J-bolts, or custom bent anchor bolts, the bend angle and leg length are essential for proper embedment and performance.
Why It Matters:
Without clear bend details, fabrication teams may default to standard angles — which might not match your foundation plan or structural drawings.
Tip:
Include a sketch or reference the specific bend angle, hook radius, or leg length (e.g., 90° bend with 6” leg). Don’t assume a “standard” applies.
3. Specifying the Wrong Finish or Coating
Choosing the wrong finish — or forgetting to request one — can lead to corrosion problems, inspection issues, or project non-compliance.
Why It Matters:
Projects exposed to weather, water, or chemicals may require hot-dip galvanizing (HDG) or zinc plating to resist corrosion. Indoor projects might use plain/oiled steel to save cost. DOT and public works jobs often require HDG or epoxy coatings to meet spec.
Tip:
Always confirm environmental conditions and coating requirements based on project specs or applicable standards (ASTM F2329 for HDG, for example).
4. Omitting the Required Grade or Material Spec
Anchor bolts come in various grades (A36, A307, F1554, etc.) — and the wrong one can mean the difference between passing or failing inspection.
Why It Matters:
If the material strength doesn’t match the engineer’s specs, you may face rejections on-site or risk performance failure under load.
Tip:
Clearly state the desired ASTM grade and yield strength. If unsure, ask your structural engineer or reach out to our team for guidance.
5. Inaccurate Quantity or Missing Hardware
Even if your bolts are perfectly made, the job stalls if you don’t have the right number — or the nuts and washers needed to install them.
Why It Matters:
Custom bolts aren’t off-the-shelf. If you need a few extras after install begins, it could delay work while replacements are fabricated.
Tip:
Order a few spares, especially for custom lengths or coated bolts. Also specify hardware (e.g., heavy hex nuts, flat washers) and coating to match the bolt.
6. Failing to Communicate Lead Times or Jobsite Needs
Even when specs are correct, a communication gap can lead to timing issues — especially if bolts are needed for early concrete pours.
Why It Matters:
Custom fabrication takes time, and job schedules are tight. If your bolt order isn’t aligned with your pour schedule, it can hold up critical path work.
Tip:
Let your supplier know your required delivery date, jobsite constraints, and preferred shipping method. At Threadline, we’re built for speed — often turning around custom orders in just 2–3 days.
Final Thought: Get It Right the First Time
Anchor bolts are one of the first items installed — and one of the hardest to fix after the fact. A few extra minutes spent confirming the details up front can save hours (or days) in the field.
At Threadline, we’re here to help you avoid missteps and deliver exactly what your project requires. From custom L-bends and headed studs to double-ended rods and DOT-compliant hardware, our team delivers fast, accurate, and dependable anchor bolt solutions.Need help with your next order? Reach out to our team for a quote or to walk through your spec sheet together.