BUMAX®: leading specialist in high-quality stainless steel fasteners
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BUMAX® is the world's leading brand of stainless steel fasteners .
BUMAX® meets the requirements of professional customers in the most demanding industrial applications.
The BUMAX® 88 andBUMAX® 109rangesare complemented by the high-performance Bumax 129 grades. TDI has been systematically stocking, distributing and recommending BUMAX® for many years, and acts as a technical and logistical relay for users. |
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Watch the video presentation : |
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BUMAX® properties:
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| A range of products to ensure a reliable, long-lasting fastening solution for every application and corrosive environment. Molybdenum content over 2.5%. | Critical size reduction, clamping force and tensile strength: BUMAX® offers strength classes ranging from steel grade 8.8 to 16.9! | All BUMAX® bolts are work-hardened and thread-rolled to increase their resistance to fatigue and seizure. | The extreme-temperature resistance of BUMAX® fasteners is distinguished by a wide temperature range: operating temperatures from -269°C (4K) to 800°C. |
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Select the material best suited to your applications:
Different grades of BUMAX® stainless steel are available for the optimum solution to your needs:
BUMAX® grades:
Bumax® 88 and Bumax® 109, are superior to standard A4 fasteners.
BUMAX® 109 uses the same material as BUMAX® 88, only the manufacturing process differs .
BUMAX® 109 thus offers superior strength and mechanical resistance to BUMAX® 88.
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Designation |
Grade |
Dimensions mm |
Limit limit MPa |
Tensile strength tensile strength MPa |
Elongation min mm |
% Mo |
Permeability magnetic |
PREN (PITTING EFFICIENT) |
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A2 -70 Standard |
302, 303, 304 ... | - | 450 | 700 | 0.4 d | - | 1.8 | 19 |
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A4-70 Standard |
316 | - | 450 | 700 | 0.4 d | 2-3 | 1.01 | 25 |
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A4-80 Standard |
316 | - | 600 | 800 | 0.3 d | 2-3 | 1.015 | 25 |
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Bumax 88 |
316L HiMo | M3-M36 | 640 | 800 | 0.3 d | 2.5 - 3 | 1.006 | 27 |
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Bumax 88 (PED) |
316L HiMo | M6-M30 | 640 | 800 | 0.4 d | 2.5 - 3 | 1.006 | 27 |
| Bumax 109 | 316L HiMo | M6-M24 | 900 | 1000 | 0.2 d | 2.5 - 3 | 1.007 | 27 |
| Bumax SDX 109 | EN 1.4410 | M6-M24 | 900 | 1000 | 0.3 d | 4 | 100 | 42 |
| Bumax DX 129 | EN 1.4462 | M6-M24 | 1080 | 1200 | 0.3 d | 3.2 | 100 | 36 |
| Steel 8.8 | - | 640 | 800 | 0,12 | - | - | - | |
| Steel 10.9 | - | 900 | 1000 | 0,09 | - | - | - |
Find out more: see our data sheet: "BUMAX OR STAINLESS STEEL, WHICH TO CHOOSE".
