Dimensions of T-head (tee-head) bolt and nut
| Size in. | A ±0,05 | B +0,030 -0,074 | C +0,25 -0,05 | D* +3 -0 | F | H +0,00 –(as spec.) | J +0,15 -0,03 | R max. |
|---|---|---|---|---|---|---|---|---|
| ⅝ x 3 | 1,50 | 0,625 | 3,0 | 2,00 | 0,625±0,04 | 1,062 -0,04 | 0,625 | 0,312 |
| ¾ x 3½ | 1,75 | 0,750 | 3,5 | 2,50 | 0,750±0,06 | 1,250 -0,06 | 0,750 | 0,375 |
| ¾ x 4 | 1,75 | 0,750 | 4,0 | 3,00 | 0,750±0,06 | 1,250 -0,06 | 0,750 | 0,375 |
| ¾ x 4½ | 1,75 | 0,750 | 4,5 | 3,00 | 0,750±0,06 | 1,250 -0,06 | 0,750 | 0,375 |
| ¾ x 5 | 1,75 | 0,750 | 5,0 | 3,00 | 0,750±0,06 | 1,250 -0,06 | 0,750 | 0,375 |
| 1 x 5½ | 2,25 | 1,000 | 5,5 | 3,00 | 1,000±0,08 | 1,625 -0,08 | 1,000 | 0,500 |
| 1 x 6 | 2,25 | 1,000 | 6,0 | 3,00 | 1,000±0,08 | 1,625 -0,08 | 1,000 | 0,500 |
| 1¼ x 6 | 2,50 | 1,250 | 6,0 | 3,50 | 1,250±0,08 | 2,000 -0,08 | 1,250 | 0,625 |
| 1¼ x 6½ | 2,50 | 1,250 | 6,5 | 3,5 | 1,250±0,08 | 2,000 -0,08 | 1,250 | 0,625 |
*) Bolts with dimension C longer than listed above are assumed to use the same thread length requirements as the longest specified.
Chemical Properties
| Component: | C | Mn | S | Ni | Cu | Ni+Cu+Cr |
|---|---|---|---|---|---|---|
| Min. | – | – | – | 0,25 | 0,20 | 1,25 |
| Max. | 0,20 | 1,25 | 0,05 | – | – | – |
Mechanical Properties
| Minimum yield strenght | 45,000 psi (310 MPa) |
| Minimum elongation in 2 in. | 20 % |
Proof Load of bolt and nut
| Bolt Size in. | Load (kN) | Load lbf |
|---|---|---|
| ⅝ | 40,0 | 9 000 |
| ¾ | 60,0 | 13 500 |
| 1 | 111,2 | 25 000 |
| 1¼ | 177,9 | 40 000 |
Torque Loads
| Pipe size nom. in. | Bolt Size in. | Range of Torque (Nm) | Range of Torque lbf/ft | Length of Wrench in. | Length of Wrench* (mm) |
|---|---|---|---|---|---|
| 3 | ⅝ | 61-81 | 45-60 | 8 | 203 |
| 4-24 | ¾ | 102-122 | 75-90 | 10 | 254 |
| 30-36 | 1 | 136-163 | 100-120 | 14 | 256 |
| 42-48 | 1¼ | 163-203 | 120-150 | 16 | 406 |
*) Applied with torque-measuring or torque-indicating wrenches.
See more in our products section for T-Head bolts and nuts assembly
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