EN 15048
Non Pre-Load Bolts
Equivalent Standard: ISO 7412
EN 15048 is a European standard that sets technical requirements for non-preloaded structural bolting assemblies made from carbon and alloy steel, intended for use in steel structures and occasionally in other structures requiring similar techniques. The standard details the specifications for non-preloaded structural bolts, nuts, and washers used in steel construction and provides guidelines to ensure their reliability and safety in various structural applications. The standard covers a range of parameters including mechanical properties, dimensions, and material requirements for non-preloaded structural bolting assemblies. Specific criteria for bolt diameters, thread lengths, head dimensions, and performance grades are outlined in Non Pre-Load Bolts EN 15048.
- EN 15048 Non Pre-Load Bolts
- Material Grade: 8.8, 10.9
- Finish: Self, Black, Bright Zinc, Hot Dip Galvanized
- Thread: METRIC
Technical Specification for EN 15048 Non Pre-Load Bolts
| BS EN 15048 Fully Threaded Setscrew Dimensions. Classes 8.8 & 10.9 | |||||||
| Nom. Dia. (d) | M12 | M16 | M20 | M24 | M30 | M36 | |
| Thread Pitch | 1.75 | 2.00 | 2.50 | 3.00 | 3.50 | 4.00 | |
| a | Max. | 5.25 | 6.00 | 7.50 | 9.00 | 10.50 | 12.00 |
| s | Min. | 17.57 | 23.16 | 29.16 | 35.00 | 45.00 | 53.80 |
| Max. | 18.00 | 24.00 | 30.00 | 36.00 | 46.00 | 55.00 | |
| e | Min. | 19.85 | 26.17 | 32.95 | 39.55 | 50.85 | 60.79 |
| df | Min. | 16.47 | 22.00 | 27.70 | 33.25 | 42.75 | 51.11 |
| c | Min. | 0.15 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
| Max. | 0.60 | 0.80 | 0.80 | 0.80 | 0.80 | 0.80 | |
| r | Min. | 0.60 | 0.60 | 0.80 | 0.80 | 1.00 | 1.00 |
| de | Max. | 13.70 | 17.70 | 22.40 | 26.40 | 33.40 | 39.40 |
| k | Min. | 7.32 | 9.71 | 12.15 | 14.65 | 18.28 | 22.08 |
| Max. | 7.68 | 10.29 | 12.85 | 15.35 | 19.12 | 22.92 | |
| Product Characteristic | Standard | |
| Fully Threaded Setscrews | ||
| General Requirements | ISO 4017 | |
| Materials & Manufacture | ISO 898-1 Classes 8.8 & 10.9 | |
| Finish / Coatings | Zinc Electroplated | BS 7371-3 or BS EN ISO 4042 |
| Hot Dip Galvanized | BS 7371-6 or BS EN ISO 10684 | |
| Mechanical Properties | ISO 898-1 Classes 8.8 & 10.9 | |
| Dimensions & Tolerances | ISO 4017 | |
| Threads | ISO 965-2 Class 6G | |
Setscrews
| Bolt Thread Diameter | Tensile Strength | Proof Load | Elongation | Hardness Rockwell HRC | |
| N/mm2 min. | N/mm2 min. | % Min. | Min. | Max. | |
| M12 | 800 | 660 | 12 | 23 | 34 |
| M16 | 830 | 660 | 12 | 23 | 34 |
| M20 | 830 | 660 | 12 | 23 | 34 |
| M22 | 830 | 660 | 12 | 23 | 34 |
| M24 | 830 | 660 | 12 | 23 | 34 |
| M27 | 830 | 660 | 12 | 23 | 34 |
| M30 | 830 | 660 | 12 | 23 | 34 |
| M36 | 830 | 660 | 12 | 23 | 34 |
| EN 15048 Assemblies also require a Charpy Impact Test to EN 10045-1 | |||||
| Nominal size and thread diameter d | Pitch of thread p | Width across flats s | Width across corners e | Thickness of nut m | ||
| Max. | Min. | Min. | Max. | Min. | ||
| M12 | 1.75 | 18.00 | 17.57 | 21.10 | 10.80 | 10.37 |
| M16 | 2.00 | 24.00 | 23.67 | 26.75 | 14.80 | 14.10 |
| M20 | 2.50 | 30.00 | 29.16 | 32.95 | 18.00 | 16.90 |
| M24 | 3.00 | 36.00 | 35.00 | 39.55 | 21.50 | 20.20 |
| M30 | 3.50 | 46.00 | 45.00 | 50.85 | 25.60 | 24.30 |
| M36 | 4.00 | 55.00 | 53.80 | 60.79 | 31.00 | 29.40 |
| Product Characteristic | Standard | |
| Nuts | ||
| General Requirements | ISO 4032 & 4034 | |
| Materials & Manufacture | ISO 4032 & 4034 Class 8, 10 & 12 | |
| Finish / Coatings | Self Colour / Black | ISO 4032 & 4034 |
| Zinc Electroplated | BS 7371-3 or BS EN ISO 4042 | |
| Hot Dip Galvanized | BS 7371-6 or BS EN ISO 10684 | |
| Mechanical Properties | Self Colour / Zinc Electroplated | ISO 4032 & 4034 Class 8 |
| Hot Dip Galvanized | ISO 4032 & 4034 Class 10 & 12 | |
| Dimensions & Tolerances | ISO 4032 & 4034 | |
| Threads | Self Colour / Zinc Electroplated | ISO 965-2 Class 6H |
| Hot Dip Galvanized | ISO 965-2 Class 6AZ | |
| Product Marking | BS EN ISO 898-2 | |
| Nut thread Diameter | Stress Area Test Mandrel | Property Class | |
| 8 | 10 | ||
| Tolerance class 6H (1) | Tolerance class 6AZ (2) | ||
| mm2 | Proof Load kN | Proof Load kN | |
| M12 | 84.3 | 67 | 78.1 |
| M16 | 157 | 125 | 150 |
| M20 | 245 | 196 | 236 |
| M24 | 353 | 282 | 342 |
| M30 | 561 | 448 | 551 |
| M36 | 817 | 653 | 808 |
| 6H (1) is the tolerance class for self colour & Zinc plated nuts. | |||
| 6AZ (2) is the tolerance class for hot dip galvanized nuts | |||
| Nominal size of bolt or screw | EN ISO 7089 – 2000 | |||||
| Inside Diameter d1 | Outside Diameter d2 | Thickness s | ||||
| Max. | Min. | Max. | Min. | Max. | Min. | |
| M12 | 13.93 | 13.50 | 24.00 | 22.70 | 2.80 | 2.20 |
| M16 | 17.93 | 17.50 | 30.00 | 28.70 | 3.60 | 2.40 |
| M20 | 22.52 | 22.00 | 37.00 | 35.40 | 3.60 | 2.40 |
| M24 | 26.52 | 26.00 | 44.00 | 42.40 | 4.60 | 3.40 |
| M30 | 33.62 | 33.00 | 56.00 | 54.10 | 4.60 | 3.40 |
| M36 | 40.00 | 39.00 | 66.00 | 64.10 | 6.00 | 4.00 |
| Product Characteristic | Standard | |
| Washers | ||
| General Requirements | EN ISO 7089 – 2000 | |
| Materials & Manufacture | EN ISO 7089 – 2000 | |
| Finish / Coatings | Self Colour / Black | EN ISO 7089 – 2000 |
| Zinc Electroplated | BS 7371-3 or BS EN ISO 4042 | |
| Hot Dip Galvanized | BS 7371-6 or BS EN ISO 10684 | |
| Dimensions & Tolerances | EN ISO 7089 – 2000 | |
