DIN 931 HEX BOLT — M14: width across flats 20.16–21 mm, head height 8.35–9.25 mm, pitch 2.00 mm. Material A4-70, surface Stainless Steel, tensile strength 700 MPa. Dimensional tolerances per DIN 931 — product grade C.
BOLTS
| Width Across Flats (s) | 20.16–21 mm |
| Head Height (k) | 8.35–9.25 mm |
| Pitch | 2.00 mm |
| Tensile Strength | 500 MPa (5.6 / 5.8) · 700 MPa (A2-70 / A4-70) · 800 MPa (8.8) · 1000 MPa (10.9) · 1220 MPa (12.9) |
| Material | Carbon steel (5.6 / 5.8 / 8.8 / 10.9 / 12.9) · Stainless steel A2 / A4 (A2-70 / A4-70) |
| Surface | Plain · Zinc plated · Passivated (stainless) |
Dimensional tolerances per DIN 931 — product grade C.
Grade A4-70 · Stainless Steel
Grade A4-70 · Plain
Grade 5.6 · Plain
Grade 8.8 · Plain
Grade 5.8 · Plain
Grade A2-70 · Stainless Steel
Grade A2-70 · Plain
Grade 10.9 · Plain
Grade 12.9 · Plain
Width across flats (s) and head height (k) across the DIN 931 / ISO 4014 hex bolt family, with M14 marked.
| Size | Width Across Flats (s) · Head Height (k) |
| M6 | 10 mm · 4 mm |
| M8 | 13 mm · 5.3 mm |
| M10 | 16 mm · 6.4 mm |
| M12 | 18 mm · 7.5 mm |
| M14 (this page) | 21 mm · 8.8 mm |
| M16 | 24 mm · 10 mm |
| M18 | 27 mm · 11.5 mm |
| M20 | 30 mm · 12.5 mm |
| M22 | 34 mm · 14 mm |
| M24 | 36 mm · 15 mm |
Nominal / maximum width across flats and nominal head height per DIN 931, product grade C. Adjacent sizes shown for selection reference — confirm the governing standard revision for your project.
| Lead time (ex-works) | 2–10 t: typically 15–20 days · over 10 t: typically 30–45 days |
| Minimum order | Stock items: no minimum · Custom production: 2 t per size |
| Inspection documents | EN 10204 2.1 / 2.2 / 3.1 available on request |
Lead time is ex-works from order confirmation and covers production plus inland delivery to port. Ocean freight transit and destination clearance are additional — confirm with us for your destination.
Contact engineering team for verified B2 data reference.
DIN 931 Partial Thread Hexagon Head Bolt per DIN 931 specification, available in A4-70 grade with Stainless Steel finish. Engineered for industrial OEM applications requiring 700.0 MPa tensile strength and reliable long-term fastening performance.
20.16–21 mm (nominal with the tolerance range shown above)
8.35–9.25 mm (nominal with the tolerance range shown above)
2.00 mm
Material: A4-70, surface: Stainless Steel, tensile strength: 700 MPa.
DIN 931 — product grade C.