PDF, DXF, STEP, or samples
Feasibility, material, surface finish
qualified partner companies
Certified quality and environmentalmanagement
We manufacture hot-formed custom bolts and custom components to customer drawing up to M100. Modern friction and eccentric presses, an in-house tool and die making department, and continuous temperature monitoring during forging ensure the highest quality and process reliability.
We manufacture custom bolts and custom components to customer drawing up to M100. Hot forming allows large volumes of material to be displaced, making a wide variety of geometries possible.
This process offers cost-effective, competitive production, particularly from medium-sized batch quantities upward. Our in-house tool and die making ensures maximum flexibility in meeting customer-specific requirements.
After forging, the components are precision-machined and quenched and tempered as specified. Threads are preferably thread-rolled, resulting in higher strength and fatigue endurance.
M100
M300 possible
4.6 · 4.8 · 5.6 · 5.8 · 6.8 · 8.8 · 10.9 · 12.9 · 14.9
A2, A4, Duplex, Inconel, Hastelloy..
We support technical procurement projects in Germany and on the international market.
Our custom bolts have been installed in, among others:
– Panama Canal
– Offshore wind power plants
– Burj Khalifa (UAE)
Special-purpose machinery
Automotive industry
Conveying technology
Structural steelwork
Plant engineering
Commercial vehicle industry
PATTBERG has been continuously certified to DIN EN ISO 9001 since 2008 (TÜV NORD, Reg. No. 44 100 121704) and, since 2024, additionally to DIN EN ISO 14001. Both certificates cover the development, design and sale of custom components manufactured to customer drawing.
DIN EN ISO 9001:2015
TÜV NORD CERT · valid until 29.06.2027 · PDF
DIN EN ISO 14001:2015
FRQM Certificate · valid until 17.06.2027 · PDF
For a reliable quote, we need the technical drawing, the desired material, the quantity, the surface finish or coating, the strength class, the target date and – if applicable – any inspection requirements. Preferred file formats are STEP/STP for 3D geometries, DXF for 2D drawings and PDF for overview and dimensional drawings.
A sample part, a hand sketch or the designation of a standard to be modified are also sufficient as a starting point – we will work out the final specification together with your design team.
Don’t have a drawing or sketch yet? Get in touch anyway – we’re happy to get involved as early as the design phase and support you with material selection, geometry and specification. If any information is missing, we will proactively reach out to you upon receipt rather than delay the quote.
For steel bolts, we cover strength classes 4.6 to 12.9 in accordance with DIN EN ISO 898-1.
For high temperatures or aggressive media, we manufacture from Duplex, Inconel and Hastelloy. Additional special alloys as well as materials to customer specification can be supplied on request – including the required material certificates.
Yes. We manufacture metric standard and fine-pitch threads, trapezoidal and round threads, inch and Whitworth threads, as well as custom threads to customer drawing. Available head forms include hexagon, hexagon socket, multi-spline socket, square, cylindrical with bore, cross-hole head, and customer-specific special geometries.
We select the manufacturing process based on size and material: hot forming up to M100 for solid forgings, headless bolts up to M500 as turned parts, and smaller sizes cold- or hot-formed or machined depending on quantity. We also cover combinations of several processing steps – e.g. forging plus subsequent machining.
Send us your drawing, material and inspection requirements – we will get back to you with technical feedback.
Request directly by email:
sales@pattberg-mbt.de
Upload your drawing, sample or specification – Ahmet Möhür will get back to you with technical feedback and a suitable solution. Response within 24 hours on business days.
Certified quality: PATTBERG has been certified to DIN EN ISO 9001 since 2008, and additionally to DIN EN ISO 14001 since 2024.
