Tension control bolts are crucial for keeping structures safe and secure. Knowing their sizes and specifications helps you choose the right bolts for your projects. While selecting the correct size ensures structural stability, ignoring these details can lead to performance issues. Understanding these factors helps you make informed and effective decisions.
Tension Control Bolts Size Chart
Tensile Strength Requirements for Bolts Tested Full-Size
| 120 ksi – A325 (Hex) & F1852 (Twist-Off) | 150 ksi – A490 (Hex) & F2280 (Twist-Off) | |||||||
|---|---|---|---|---|---|---|---|---|
| Diameter | Stress Area in ² | Tensile min lbf | Proof Load min lbf | Proof Load min lbf | Tensile min lbf | Tensile max lbf | Proof Load min lbf | Proof Load min |
| 1/2″ | 0.142 | 17,050 | 12,050 | 13,050 | 21,300 | 24,600 | 17,050 | 18,500 |
| 5/8″ | 0.226 | 27,100 | 19,200 | 20,800 | 33,900 | 39,100 | 27,100 | 29,400 |
| 3/4″ | 0.334 | 40,100 | 28,400 | 30,700 | 50,100 | 57,800 | 40,100 | 43,400 |
| 7/8″ | 0.462 | 55,450 | 39,250 | 42,500 | 69,300 | 79,950 | 55,450 | 60,100 |
| 1″ | 0.606 | 72,700 | 51,500 | 55,700 | 90,900 | 104,850 | 72,700 | 78,800 |
| 1-1/8″ | 0.763 | 91,600 | 64,900 | 70,250 | 114,450 | 132,000 | 91,600 | 99,200 |
| 1-1/4″ | 0.969 | 116,300 | 82,400 | 89,200 | 145,350 | 167,650 | 116,300 | 126,000 |
| 1-3/8″ | 1.155 | 138,600 | 98,200 | 106,300 | 173,250 | 199,850 | 138,600 | 150,200 |
| 1-1/2″ | 1.105 | 168,600 | 119,500 | 129,300 | 210,750 | 243,100 | 168,600 | 182,600 |
| Above values based on | 120,000psi | 85,000psi | 92,000psi | 150,000psi | 173,000psi | 120,000psi | 130,000psi | |
| Source: ASTM F3125-15 | ||||||||
F3125-15 Table 7 Twist-Off Style Assembly Installation Tension Test (Minimum Tension, lbf)
| Diameter | F1852 | F2280 |
|---|---|---|
| 1/2″ | 12,550 | 15,650 |
| 5/8″ | 19,900 | 24,900 |
| 3/4″ | 29,450 | 36,800 |
| 7/8″ | 40,750 | 50,950 |
| 1″ | 53,450 | 66,800 |
| 1-1/8″ | 67,350 | 84,100 |
| 1-1/4″ | 85,500 | 106,850 |
| Source: ASTM F3125-15 | ||
5/8 (11) A325/F1852 – TC BOLTS IN STOCK
| A325/F1852 Part | SIZE | LBS PER 100 | KEG QTY | Min Tensile F1852/F2280 |
|---|---|---|---|---|
| PTU062150 | 5/8(11)X 1-1/2 | 40 | 500 | 120/150 ksi |
| PTU062175 | 5/8(11)X 1-3/4 | 43 | 470 | 120/150 ksi |
| PTU062200 | 5/8(11)X 2″ | 45 | 450 | 120/150 ksi |
| PTU062225 | 5/8(11)X 2-1/4 | 47 | 410 | 120/150 ksi |
| PTU062250 | 5/8(11)X 2-1/2 | 49 | 380 | 120/150 ksi |
| PTU062275 | 5/8(11)X 2-3/4 | 51 | 360 | 120/150 ksi |
| PTU062300 | 5/8(11)X 3″ | 54 | 325 | 120/150 ksi |
3/4 (10) A325/F1852 & A490/F2280 – TC BOLTS IN STOCK
| A325/F1852 Part | A490/F2280 Part | SIZE | LBS PER 100 | KEG QTY | Min Tensile F1852/F2280 |
|---|---|---|---|---|---|
| PTU075175 | PTF075175 | 3/4(10)X 1-3/4 | 66 | 300 | 120/150 ksi |
| PTU075200 | PTF075200 | 3/4(10)X 2″ | 70 | 280 | 120/150 ksi |
| PTU075225 | PTF075225 | 3/4(10)X 2-1/4 | 73 | 270 | 120/150 ksi |
| PTU075250 | PTF075250 | 3/4(10)X 2-1/2 | 76 | 250 | 120/150 ksi |
| PTU075275 | PTF075275 | 3/4(10)X 2-3/4 | 79 | 250 | 120/150 ksi |
| PTU075300 | PTF075300 | 3/4(10)X 3″ | 83 | 240 | 120/150 ksi |
| PTU075325 | PTF075325 | 3/4(10)X 3-1/4 | 86 | 230 | 120/150 ksi |
| PTU075350 | PTF075350 | 3/4(10)X 3-1/2 | 89 | 220 | 120/150 ksi |
| PTU075375 | PTF075375 | 3/4(10)X 3-3/4 | 92 | 200 | 120/150 ksi |
| PTU075400 | PTF075400 | 3/4(10)X 4″ | 95 | 190 | 120/150 ksi |
| PTU075425 | PTF075425 | 3/4(10)X 4-1/4 | 98 | 180 | 120/150 ksi |
| PTU075450 | PTF075450 | 3/4(10)X 4-1/2 | 102 | 170 | 120/150 ksi |
| PTU075475 | PTF075475 | 3/4(10)X 4-3/4 | 105 | 170 | 120/150 ksi |
| PTU075500 | PTF075500 | 3/4(10)X 5″ | 108 | 150 | 120/150 ksi |
| PTU075550 | PTF075550 | 3/4(10)X 5-1/2 | 114 | 150 | 120/150 ksi |
| PTU075600 | PTF075600 | 3/4(10)X 6″ | 118 | 130 | 120/150 ksi |
7/8 (9) A325/F1852 & A490/F2280 – TC BOLTS IN STOCK
| A325 Part # | A490 Part # | SIZE | LBS PER 100 | KEG QTY | Min Tensile F1852/F2280 |
|---|---|---|---|---|---|
| PTU087200 | PTF087200 | 7/8(9)X 2 | 106 | 200 | 120/150 ksi |
| PTU087225 | PTF087225 | 7/8(9)X 2-1/4 | 110 | 190 | 120/150 ksi |
| PTU087250 | PTF087250 | 7/8(9)X 2-1/2 | 114 | 180 | 120/150 ksi |
| PTU087275 | PTF087275 | 7/8(9)X 2-3/4 | 120 | 180 | 120/150 ksi |
| PTU087300 | PTF087300 | 7/8(9)X 3 | 124 | 170 | 120/150 ksi |
| PTU087325 | PTF087325 | 7/8(9)X 3-1/4 | 128 | 160 | 120/150 ksi |
| PTU087350 | PTF087350 | 7/8(9)X 3-1/2 | 129 | 150 | 120/150 ksi |
| PTU087375 | PTF087375 | 7/8(9)X 3-3/4 | 131 | 140 | 120/150 ksi |
| PTU087400 | PTF087400 | 7/8(9)X 4 | 136 | 140 | 120/150 ksi |
| PTU087425 | PTF087425 | 7/8(9)X 4-1/4 | 140 | 130 | 120/150 ksi |
| PTU087450 | PTF087450 | 7/8(9)X 4-1/2 | 143 | 130 | 120/150 ksi |
| PTU087475 | PTF087475 | 7/8(9)X 4-3/4 | 149 | 120 | 120/150 ksi |
| PTU087500 | PTF087500 | 7/8(9)X 5 | 153 | 120 | 120/150 ksi |
| PTU087550 | PTF087550 | 7/8(9)X 5-1/2 | 162 | 100 | 120/150 ksi |
| PTU087600 | PTF087600 | 7/8(9)X 6 | 170 | 100 | 120/150 ksi |
1 (8) A325/F1852 & A490/F2280 – TC BOLTS IN STOCK
| A325/F1852 Part # | A325/F2280 Part # | SIZE | LBS PER 100 | KEG QTY | Min Tensile F1852/F2280 |
|---|---|---|---|---|---|
| PTU100200 | PTF100200 | 1(8)X 2 | 140 | 150 | 120/150 ksi |
| PTU100225 | PTF100225 | 1(8)X 2-1/4 | 143 | 140 | 120/150 ksi |
| PTU100250 | PTF100250 | 1(8)X 2-1/2 | 149 | 130 | 120/150 ksi |
| PTU100275 | PTF100275 | 1(8)X 2-3/4 | 154 | 130 | 120/150 ksi |
| PTU100300 | PTF100300 | 1(8)X 3 | 160 | 120 | 120/150 ksi |
| PTU100325 | PTF100325 | 1(8)X 3-1/4 | 166 | 120 | 120/150 ksi |
| PTU100350 | PTF100350 | 1(8)X 3-1/2 | 171 | 110 | 120/150 ksi |
| PTU100375 | PTF100375 | 1(8)X 3-3/4 | 177 | 110 | 120/150 ksi |
| PTU100400 | PTF100400 | 1(8)X 4 | 183 | 100 | 120/150 ksi |
| PTU100425 | PTF100425 | 1(8)X 4-1/4 | 188 | 90 | 120/150 ksi |
| PTU100450 | PTF100450 | 1(8)X 4-1/2 | 194 | 90 | 120/150 ksi |
| PTU100475 | PTF100475 | 1(8)X 4-3/4 | 199 | 90 | 120/150 ksi |
| PTU100500 | PTF100500 | 1(8)X 5 | 205 | 90 | 120/150 ksi |
| PTU100550 | PTF100550 | 1(8)X 5-1/2 | 217 | 80 | 120/150 ksi |
| PTU100600 | PTF100600 | 1(8)X 6 | 228 | 80 | 120/150 ksi |
| PTU100650 | PTF100650 | 1(8)X 6-1/2 | 251 | 65 | 120/150 ksi |
| PTU100700 | PTF100700 | 1(8)X 7 | 262 | 60 | 120/150 ksi |
| PTU100750 | PTF100750 | 1(8)X 7-1/2 | 273 | 55 | 120/150 ksi |
| PTU100800 | PTF100800 | 1(8)X 8 | 288 | 55 | 120/150 ksi |
| PTU100850 | PTF100850 | 1(8)X 8-1/2 | 299 | 50 | 120/150 ksi |
1-1/8 (7) F1852/A325 TC and F2280/A490 TC BOLTS IN STOCK
| A325/F1852 Part # | A490/F2280 Part # | SIZE | LBS PER 100 | KEG QTY | Min Tensile F1852/F2280 |
|---|---|---|---|---|---|
| PTU113250 | PTF113250 | 1-1/8(7)X 2-1/2 | 218 | 80 | 120/150 ksi |
| PTU113275 | PTF113275 | 1-1/8(7)X 2-3/4 | 225 | 80 | 120/150 ksi |
| PTU113300 | PTF113300 | 1-1/8(7)X 3 | 232 | 80 | 120/150 ksi |
| PTU113325 | PTF113325 | 1-1/8(7)X 3-1/4 | 250 | 70 | 120/150 ksi |
| PTU113350 | PTF113350 | 1-1/8(7)X 3-1/2 | 252 | 70 | 120/150 ksi |
| PTU113375 | PTF113375 | 1-1/8(7)X 3-3/4 | 254 | 70 | 120/150 ksi |
| PTU113400 | PTF113400 | 1-1/8(7)X 4 | 260 | 70 | 120/150 ksi |
| PTU113425 | PTF113425 | 1-1/8(7)X 4-1/4 | 267 | 60 | 120/150 ksi |
| PTU113450 | PTF113450 | 1-1/8(7)X 4-1/2 | 273 | 60 | 120/150 ksi |
| PTU113475 | PTF113475 | 1-1/8(7)X 4-3/4 | 280 | 50 | 120/150 ksi |
| PTU113500 | PTF113500 | 1-1/8(7)X 5 | 288 | 50 | 120/150 ksi |
| PTU113550 | PTF113550 | 1-1/8(7)X 5-1/2 | 302 | 50 | 120/150 ksi |
| PTU113600 | PTF113600 | 1-1/8(7)X 6 | 316 | 50 | 120/150 ksi |
| PTU113650 | PTF113650 | 1-1/8(7)X 6-1/2 | 50 | 120/150 ksi | |
| PTU113700 | PTF113700 | 1-1/8(7) X 7 | 320 | 40 | 120/150 ksi |
| PTU113750 | PTF113750 | 1-1/8(7) X 7-1/2 | 341 | 40 | 120/150 ksi |
| PTU113800 | PTF113800 | 1-1/8(7)X 8 | 40 | 120/150 ksi |
ASTM F1852 & F2280 Dimensions for TC Bolts
| Diameter | Height (H) | Bearing Surface Diameter (D) | Length of Spline (LS) | Width Across Flats (S) | |
|---|---|---|---|---|---|
| Max | Min | Min | REFERENCE ONLY | REFERENCE ONLY | |
| 5/8 | 0.403 | 0.378 | 1.102 | 06 | 0.43 |
| 3/4 | 0.483 | 0.455 | 1.338 | 065 | 0.53 |
| 7/8 | 0.563 | 0.531 | 1.535 | 0.72 | 0.16 |
| 1 | 0.627 | 0.591 | 1.771 | 0.8 | 0.7 |
| 1-1/8 | 0.718 | 0.658 | 1.991 | 0.9 | 0.8 |
To Determine Bolt Length Add to Grip
| Bolt Dia | 0 Washers | 1 Washer | 2 Washers |
|---|---|---|---|
| 1/2″ | 11/16″ | 55/64″ | 1-3/64″ |
| 5/8″ | 7/8″ | 1-1/32″ | 1-3/16″ |
| 3/4″ | 1″ | 1-5/32″ | 1-5/16″ |
| 7/8″ | 1-1/8″ | 1-9/32″ | 1-7/16″ |
| 1″ | 1-1/4″ | 1-13/32″ | 1-9/16″ |
| 1-1/8″ | 1-1/2″ | 1-21/32″ | 1-13/16″ |
| 1-1/4″ | 1-5/8″ | 1-25/32″ | 1-15/16″ |
| 1-3/8″ | 1-3/4″ | 1-29/32″ | 2-1/16″ |
| 1-1/2″ | 1-7/8″ | 2-1/32″ | 2-3/16″ |
Importance of Correct Sizing
Choosing the correct size of tension control bolts is vital for achieving the desired clamping force and ensuring overall safety and performance. Accurate sizing ensures that bolts can handle the required load without failure. However, opting for the wrong size can compromise the joint’s stability, leading to potential safety risks.
Balancing factors like load requirements and environmental conditions is essential. Failing to consider these elements may result in ineffective bolted connections, highlighting the importance of thorough evaluation when selecting bolts from the size chart.
How to Read a Tension Control Bolt Size Chart
Understanding how to interpret a size chart is crucial for selecting the appropriate bolt for your application. Start by grasping the measurements and load ratings listed on the chart. Accurate interpretation ensures you choose a bolt that meets your project’s needs.
Balancing factors like load capacity and bolt dimensions can be challenging, but failing to do so may lead to structural issues. By carefully analyzing the size chart, you make informed decisions that enhance safety and performance. This approach minimizes risks and maximizes the effectiveness of your bolted connections.
Tips for Choosing the Right Tension Control Bolts
To ensure optimal performance and safety, consider these essential tips when selecting tension control bolts for your projects. First, evaluate the load requirements to match the bolt size accordingly. Additionally, account for environmental conditions, as they can affect bolt performance.
Balancing these factors might be challenging, but ignoring them could lead to structural failures. By carefully assessing the size chart and understanding these trade-offs, you make informed choices that enhance the reliability of your bolted connections. This thoughtful approach minimizes risks and ensures that your projects meet safety and performance standards.
FAQs
1. What factors should I consider when choosing the size of a tension control bolt?
Answer: When selecting the size of a tension control bolt, consider the load requirements, environmental conditions, and the specific application. Load requirements determine the clamping force needed, while environmental factors like temperature and exposure to chemicals can affect bolt performance. Accurate sizing ensures the bolt can handle the necessary load and withstand environmental stressors.
2. How do I read a tension control bolt size chart correctly?
Answer: To read a tension control bolt size chart, start by identifying the bolt’s dimensions, such as diameter and length, as well as the load ratings specified. Match these measurements to your project’s requirements. Pay attention to any additional notes or specifications provided on the chart, such as material type or threading details, to ensure the bolt is suitable for your application.
3. What are the common mistakes to avoid when selecting tension control bolts?
Answer: Common mistakes include selecting a bolt size that does not match the load requirements, overlooking environmental factors that affect bolt performance, and failing to verify compatibility with other components. To avoid these issues, carefully review the size chart, consider all factors affecting bolt performance, and consult with experts if needed to ensure you make the right choice for your project.