What is the TC BOLTS ?
TC Bolts (Tension Control Bolts / Twist-off Bolts) are high-strength, self-indicating structural fasteners designed for precise, consistent preloading in critical steel connections. They are the industry standard for modern steel construction.Gmetalparts is one of the leading hexagon head tc bolts manufacturers, especially heavy hex bolts A325, bolts A490 together with heavy hex nuts A563.
Main parameterss Of TC Bolts:
- Material: Alloy Steel
- Size: 1/2” to 1-1/2”
- Grade: ASTM A325, A490
- Surface Finish: Plain, Black, Zinc, Hot dip galvanizing
- Thread: Full thread or half thread
- Application: Steel to steel structure connections
- Package: Small box, or 25kgs/carton, 36cartons/pallet
- Delivery: 30 days
- For tc bolts dimensions, please send request at sales@gmetalparts.com
Bolts Production
Gmetal is a bolts and screws manufacturer and supplier located in Hangzhou, China. Hexagon head bolts, heavy hex bolts, structural bolts A325, A490 are our main products in production line.
More about tension control bolt
What does TC bolt stand for?
TC is Tension Control when refer to a TC bolt, i.e Tension Control Bolt, which is a high strength and heavy duty bolt used in steel frame construction. The head is usually hexagon or domed and is not designed to be driven, which usually works with hexagon nuts and washers. Gmetal as a leading tc bolts manufacturer and supplier, we produce, stock and deliver different sizes A325 tc bolts, A563 hex nuts and washers for regular and potential customer in construction industry.
What does a complete TC bolt assembly include?
It includes Bolt (with spline)+ Heavy hex nut + Hardened washer as a matched set.
How Does A Tension Control Bolt Work?
Insert the TC bolt into the connection.Fit the washer and nut.
Use a special TC shear wrench that grips both the spline and the nut.
As tension increases, the calibrated spline neck snaps off at the designed preload.Installation is complete — no torque calculation or adjustment needed.
What’s the main advantage of TC bolt ?
TC bolts provide accurate and consistent tension for every bolt, feature fast installation with higher efficiency than conventional bolts, allow easy inspection without requiring special tools, deliver reliable structural performance for critical steel connections, and help reduce labor cost and minimize rework.
Where to use Tension control bolt ?
This bolt is usually used the following area : Steel buildings, high‑rises, factories, stadiums
Bridges, highway and railway structures
Power plants, industrial steel structures
Wind turbine towers
Any structural joint requiring high strength & guaranteed tension
Is A325 A High Strength Bolt?
Yes, ASTM A325 bolts are high strength hex structural bolts used in steel structure connections. Gmetal produce and export both heavy hex bolts A325 alone or A325 tc bolts with hex nuts and washers.
To check the best prices and delivery, please reach us at sales@gmetalparts.com , we would be happy to hear from you and to provide the reliable products and services.
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FAQ of Hexagon Head Bolts
1. Are you a hex bolts manufacturer?
Yes, Gmetal is a bolt factory, hex bolts manufacturers and suppliers, as well as leading fasteners manufacturers in china.
We mainly porduce black oxide hex bolts,Hot dipped galvanized hex bolts , Socket head cap screw, metric hex head bolts, stainless steel hex head bolts etc.
2. How long is your delivery time for black hex head bolts?
It takes 7-10 days for stock products. For bulk order, it will be in 30-60 days according to the order quantity.
3. Can we have samples for metric hex head bolts?
Yes, free samples are available, if you have a courier acount like DHL/FEDEX/UPS to collect the samples.
4. Can we use our own head mark or customize package for hex head bolts?
Yes, Gmtal as a hex bolts manufacturers, we can customize headmark and package, please send the requirements when place order.
5. How can we make an order for metric hex head bolts?
Just inquiry on our page or send a email to jenny@gmetalparts.com
For hex head bolt dimensions or weight chart for din 931, din933, iso 4014, iso 4017 ,astm a325 ,as1252 pdf, please feel free to contact us.
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