ASME B18.2.1 HEX BOLT — 1/4: width across flats 10.79–11.13 mm, head height 3.81–4.78 mm, pitch 20 TPI. Material Grade 5, surface Plain, tensile strength 119,946 psi. Dimensional tolerances per ASME B18.
BOLTS
| Width Across Flats (F) | 10.79–11.13 mm |
| Head Height (H) | 3.81–4.78 mm |
| Pitch | 20 TPI |
| Tensile Strength | 119,946 psi |
| Material | Grade 5 |
| Surface | Plain |
Dimensional tolerances per ASME B18.2.1-2012 (hex bolts) (inch series; values converted from inches).
Grade Grade 5 · Plain
Grade Grade 5 · Zinc
Grade Grade 5 · HDG
Grade Grade 8 · Plain
Grade Grade 8 · Zinc
Grade Grade 8 · HDG
Contact engineering team for verified B2 data reference.
ASME B18.2.1 Hexagon Head Bolt per ASME B18.2.1 specification, available in Grade 5 grade with Plain finish. Engineered for industrial OEM applications requiring 827.0 MPa tensile strength and reliable long-term fastening performance.
10.79–11.13 mm (nominal with the tolerance range shown above)
3.81–4.78 mm (nominal with the tolerance range shown above)
20 TPI
Material: Grade 5, surface: Plain, tensile strength: 119,946 psi.
ASME B18.