## What are the torque specs for bolts?

Recommended bolt torques.

Size (in) Torque (lbf ft)
5/16 8 11.8
3/8 15 22
7/16 24 33

### What is the torque for a 12mm bolt?

Metric Recommended Bolt Torque

Bolt Diameter (mm) Recommended Torque (Nm)
Class 8.8 Class 10.9
10 55 75
12 100 135
14 160 215

#### What is the torque spec for 1/4 20 bolt?

Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws

1/4-20 (.250) 2025 76 in lbs.
5/16-18 (.3125) 3338 13 ft lbs.
3/8-16 (.375) 4950 23 ft lbs.

How do you calculate torque of a screw?

The basic formula T = K x D x P stated earlier takes these factors into account and provides users with a starting point for establishing an initial target tightening torque.

What is the torque on a 10 mm bolt?

For bolts with a 10mm Thread Diameter: 25Nm.

## What should a 1/2 bolt be torqued to?

US Recommended Bolt Torque

Size Recommended Torque
1/2″ 37 90
9/16″ 53 129
5/8″ 73 180

### What is the torque for 1/4 bolt?

ASTM A449 / SAE Grade 5*

Bolt Size TPI Tightening Torque (ft lbs)
Plain
1⁄4 20 8
5⁄16 18 17
3⁄8 16 31

#### How much torque can a 1/2 inch bolt take?

ASTM A449 / SAE Grade 5*

Bolt Size TPI Tightening Torque (ft lbs)
Galv+Waxed
1⁄2 13 38
9⁄16 12 54
5⁄8 11 75

What are the recommended torques for metric bolts?

Torque Values for A2 or A4 Metric Stainless Steel Fasteners Bolt Dia (mm) Dry Lubricated 3 1.0 0.9 8.9 in-lbs. 8.0 in-lbs. 4 2.6 2.3 23.0 20.7 5 5.1 4.6 45.1 40.6 6 8.7 7.8 77.0 69.3 8 21.2 19.1 188 169 10 42 38 372 335 12 73 66 54 ft-lbs. 48 ft-lbs. 14 118 106 87 78 16 180 162 133 119 18 258 232 190 171 20 370 333 273 246 22 485 437 358 322 24

What are the torque specifications for a metric bolt?

– Capturing bearing races in housings – Setting preload on certain types of bearings – Smaller size bolts which can be easily over torqued. – Bolts in soft materials such as aluminum Example-hydraulic manifolds – Any housing or thin wall material that has a chance to be distorted if over tightened or an uneven torque is applied.

## What is the maximum bolt torque?

Bolt Size TPI Tension (lbs) Tightening Torque Range (ft lbs) (Min – Max) Min Max Plain Lubricated; 1 ⁄ 2: 13: 15,000: 18,000: 125 – 150: 63 – 75: 5 ⁄ 8: 11: 24,000: 29,000: 250 – 302: 125 – 151: 3 ⁄ 4: 10: 35,000: 42,000: 438 – 525: 219 – 263: 7 ⁄ 8: 9: 49,000: 59,000: 715 – 860: 357 – 430: 1: 8: 64,000: 77,000: 1,067 – 1,283: 533 – 642: 1 1 ⁄ 8: 7: 80,000: 96,000: 1,500 – 1,800: 750 – 900: 1 1 ⁄ 4: 7: 102,000: 122,000: 2,125 – 2,542

### How to calculate torque to tighten bolts?

– T Target tighten torque (the result of this formula is in inch pounds, dividing by 12 yields foot pounds – K Coefficient of friction (nut factor), always an estimation in this formula – D Bolts nominal diameter in inches – P