Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- API 6A ; API 20E; API 20F
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASME B18.2.3.3M Heavy Hex Structural Bolts (Metric) Dimensions
Metric Dimensions for Heavy Hex Structural Bolts
For 316 stainless heavy-hex structural bolt material, see ASTM A193 B8M Class 1, Class 2, or Class 1D for heavier sections.
ASME B18.2.3.3M Standard specifies the dimensions and requirements for metric heavy hex structural bolts, commonly used in structural steel connections and high-strength applications. It includes details on bolt geometry, thread specifications, and tolerance limits to ensure structural integrity and reliability. This page provides comprehensive ASME B18.2.3.3M Dimensions, including metric size charts and engineering data.
Metric Heavy Hex Structural Bolt Dimensions, Lengths, and Thread Specifications
| Nominal Dia., D , and Thread Pitch | Body Diameter.,D s | Width Across Flats,S | Width Across Corners, E | Head Height, K | Wrenching Height, K 1 | Washer Face Thickness,C | Washer FaceDia.,D w | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Max | Min | Max | Min | Max | Min | Min | Max | Min | Min | |
| M12 × 1.75 | 12 | 11.73 | 21 | 20.67 | 24.25 | 23.35 | 7.76 | 7.24 | 5.2 | 0.6 | 0.3 | 19.6 |
| M14 × 2 | 14 | 13.73 | 24 | 23.67 | 27.71 | 26.75 | 9.09 | 8.51 | 6.2 | 0.6 | 0.3 | 22.5 |
| M16 × 2 | 16 | 15.73 | 27 | 26.67 | 31.18 | 30.14 | 10.32 | 9.68 | 7 | 0.8 | 0.4 | 25.3 |
| M20 × 2.5 | 20 | 19.67 | 34 | 33 | 39.26 | 37.29 | 12.88 | 12.12 | 8.8 | 0.8 | 0.4 | 31.4 |
| M24 × 3 | 24 | 23.67 | 41 | 40 | 47.34 | 45.2 | 15.44 | 14.56 | 10.5 | 0.8 | 0.4 | 38 |
| M30 × 3.5 | 30 | 29.67 | 50 | 49 | 57.74 | 55.37 | 19.48 | 17.92 | 13.1 | 0.8 | 0.4 | 46.6 |
| M36 × 4 | 36 | 35.61 | 60 | 58.8 | 69.28 | 66.44 | 23.38 | 21.72 | 15.8 | 0.8 | 0.4 | 55.9 |
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