#10" Grade 2 Torque Specification

Torque Values by Surface Condition

Stress area: 0.0175 in² · Proof load: 963 lbs · Clamp load (75%): 722 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	2.3	3.1	27.6	31.6
Oiled	0.15	1.7	2.3	20.4	23.5
Zinc Plated	0.18	2.1	2.8	25.2	28.6
Waxed	0.1	1.1	1.5	13.2	15.3
MoS₂	0.12	1.4	1.9	16.8	19.4
Galvanized	0.25	2.9	3.9	34.8	39.8

Stress area: 0.02 in² · Proof load: 1,100 lbs · Clamp load (75%): 825 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	2.6	3.5	31.2	35.7
Oiled	0.15	2.0	2.7	24.0	27.5
Zinc Plated	0.18	2.4	3.3	28.8	33.7
Waxed	0.1	1.3	1.8	15.6	18.4
MoS₂	0.12	1.6	2.2	19.2	22.4
Galvanized	0.25	3.3	4.5	39.6	45.9

Formula: T = K × D × F

Step 1 — Clamp load: F = 0.75 × 55,000 psi × 0.0175 in² = 722 lbs

Step 2 — Torque (dry): T = 0.20 × 0.19 in × 722 lbs ÷ 12 = 2.3 ft·lbs

Proof stress per SAE J429 Table 3. Stress area per ASME B1.1. K-factor per VDI 2230.

General-purpose, non-critical bolting. Most common ungraded hardware-store bolts.

• Torque values are for standard hex bolts with unified threads per ASME B1.1. Socket head cap screws may have different requirements.
• Lubrication reduces required torque significantly — using dry torque values on lubricated bolts risks exceeding yield strength.
• For critical or safety-related applications, always consult the manufacturer's specifications or applicable design standard.
• Re-used bolts may have altered friction characteristics. Inspect threads before reuse.

Size#10"

Grade2

Diameter0.19" (4.83 mm)

TPI (UNC)24

Tensile74,000 psi

Yield57,000 psi

Proof55,000 psi