#10" Grade 5 Torque Specification

Torque Values by Surface Condition

Stress area: 0.0175 in² · Proof load: 1,488 lbs · Clamp load (75%): 1,116 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	3.5	4.7	42.0	47.9
Oiled	0.15	2.6	3.5	31.2	35.7
Zinc Plated	0.18	3.2	4.3	38.4	43.8
Waxed	0.1	1.8	2.4	21.6	24.5
MoS₂	0.12	2.1	2.8	25.2	28.6
Galvanized	0.25	4.4	6.0	52.8	61.2

Stress area: 0.02 in² · Proof load: 1,700 lbs · Clamp load (75%): 1,275 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	4.0	5.4	48.0	55.1
Oiled	0.15	3.0	4.1	36.0	41.8
Zinc Plated	0.18	3.6	4.9	43.2	50.0
Waxed	0.1	2.0	2.7	24.0	27.5
MoS₂	0.12	2.4	3.3	28.8	33.7
Galvanized	0.25	5.0	6.8	60.0	69.3

Formula: T = K × D × F

Step 1 — Clamp load: F = 0.75 × 85,000 psi × 0.0175 in² = 1,116 lbs

Step 2 — Torque (dry): T = 0.20 × 0.19 in × 1,116 lbs ÷ 12 = 3.5 ft·lbs

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

Automotive, agricultural equipment, general machinery — the most common high-strength SAE grade. Equivalent to ISO 8.8.

• 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"

Grade5

Diameter0.19" (4.83 mm)

TPI (UNC)24

Tensile120,000 psi

Yield92,000 psi

Proof85,000 psi