7/16" Grade 5 Torque Specification

Torque Values by Surface Condition

Stress area: 0.1063 in² · Proof load: 9,036 lbs · Clamp load (75%): 6,777 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	49.4	67.0	592.8	683.2
Oiled	0.15	37.1	50.3	445.2	512.9
Zinc Plated	0.18	44.5	60.3	534.0	614.9
Waxed	0.1	24.7	33.5	296.4	341.6
MoS₂	0.12	29.6	40.1	355.2	408.9
Galvanized	0.25	61.8	83.8	741.6	854.5

Stress area: 0.1187 in² · Proof load: 10,090 lbs · Clamp load (75%): 7,567 lbs

Surface Condition	K Factor	ft·lbs	N·m	in·lbs	kgf·cm
Plain/Dry	0.2	55.2	74.8	662.4	762.8
Oiled	0.15	41.4	56.1	496.8	572.1
Zinc Plated	0.18	49.7	67.4	596.4	687.3
Waxed	0.1	27.6	37.4	331.2	381.4
MoS₂	0.12	33.1	44.9	397.2	457.9
Galvanized	0.25	69.0	93.6	828.0	954.5

Formula: T = K × D × F

Step 1 — Clamp load: F = 0.75 × 85,000 psi × 0.1063 in² = 6,777 lbs

Step 2 — Torque (dry): T = 0.20 × 0.4375 in × 6,777 lbs ÷ 12 = 49.4 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.

Size7/16"

Grade5

Diameter0.4375" (11.11 mm)

TPI (UNC)14

Tensile120,000 psi

Yield92,000 psi

Proof85,000 psi