DIN 933 and ISO 4017 describe the fully threaded hexagon head screw: coarse metric thread, product grade A up to M24 and B above, head across-flats to ISO 272 (13 mm for M8, 16 mm for M10, 18 mm for M12 in the ISO series; 17 and 19 mm on the older DIN heads for M10 and M12). Property class 8.8 zinc-plated is the general-purpose stock item; 10.9 and 12.9 for preloaded joints; stainless A2-70 for indoor and mild outdoor corrosion; A4-70/A4-80 (1.4401 / 1.4404) for marine and chemical exposure; hot-dip galvanised for structural steel outdoors. The table lists the catalogue by thread size and length, one column per material and finish, so the right bolt can be quoted directly from the drawing callout.
ISO 4017 and DIN 933 are dimensionally interchangeable except for the across-flats width of M10, M12, M14 and M22 heads (ISO 272 sizes 16, 18, 21, 34 mm versus DIN 17, 19, 22, 32 mm) — check spanner and socket clearance when swapping. Threaded-to-the-head screws suit tapped holes and short clamp lengths; for long clamp lengths where the shank should carry the shear load, use the part-threaded DIN 931 / ISO 4014 finder. Nuts and washers should match the bolt material: A4 nut on an A4 bolt, class 8 nut on an 8.8 bolt, hot-dip galvanised nuts (tapped oversize) on hot-dip bolts.
Coverage: 8,313 catalogue rows with a readable rating, of 18,458 in these categories. Each cell lists up to 2 part numbers per column; click a part number for the product page and a quotation.
| Thread × length | Steel 8.8 zinc-plated | Steel 8.8 plain / other finish | Steel 10.9 / 12.9 | Steel 4.6–6.8 / other | Hot-dip galvanised | Stainless A2 | Stainless A4 |
|---|---|---|---|---|---|---|---|
| M2 × 4 | — | — | — | — | — | 4017A20200470 | 4017A40200470 4017A40200480 |
| M2 × 5 | — | — | — | — | — | 933A202005 933A202005-S | 4017A40200570 |
| M2 × 6 | — | — | — | — | — | 4017A20200670 | 4017A40200670 |
| M2 × 8 | — | — | — | 933B02008 | — | 4017A20200870 | 933A402008 4017A40200870 |
| M2 × 10 | 9338020101 | — | — | — | — | 4017A20201070 | 4017A40201070 |
| M2 × 12 | — | — | — | — | — | 4017A20201270 | 4017A40201270 |
| M2 × 14 | — | — | — | — | — | — | 4017A40201470 |
| M2 × 16 | — | — | — | — | — | 4017A20201670 | 4017A40201670 |
| M2 × 20 | — | — | — | — | — | 4017A20202070 | 4017A40202070 |
| Thread × length | Steel 8.8 zinc-plated | Steel 8.8 plain / other finish | Steel 10.9 / 12.9 | Steel 4.6–6.8 / other | Hot-dip galvanised | Stainless A2 | Stainless A4 |
|---|---|---|---|---|---|---|---|
| M2.5 × 3 | — | — | — | — | — | 4017A202500370 | 4017A402500370 |
| M2.5 × 4 | — | — | — | — | — | 4017A202500470 | 4017A402500470 |
| M2.5 × 5 | — | — | — | — | — | 4017A202500570 | 4017A402500570 |
| M2.5 × 6 | — | — | — | — | — | 4017A202500670 | 4017A402500670 |
| M2.5 × 8 | — | — | — | — | — | 4017A202500870 | 4017A402500870 |
| M2.5 × 10 | — | — | — | 93350250104 | — | 4017A202501070 | 4017A402501070 |
| M2.5 × 12 | 93380250121 | — | — | — | — | 4017A202501270 | 933A4025012 |
| M2.5 × 14 | — | — | — | — | — | — | 4017A402501470 |
| M2.5 × 16 | 93380250161 | — | — | — | — | 4017A202501670 | 4017A402501670 |
| M2.5 × 18 | 93380250181SST096 | — | — | — | — | — | — |
| M2.5 × 20 | 93380250201 | — | — | — | — | 4017A202502070 | 4017A402502070 |
| M2.5 × 25 | — | — | — | — | — | 4017A202502570 | — |
| M2.5 × 35 | 93380250351SST096 | — | — | — | — | — | — |
| Thread × length | Steel 8.8 zinc-plated | Steel 8.8 plain / other finish | Steel 10.9 / 12.9 | Steel 4.6–6.8 / other | Hot-dip galvanised | Stainless A2 | Stainless A4 |
|---|---|---|---|---|---|---|---|
| M7 × 12 | 9338070121 | 933807012 | — | — | — | — | — |
| M7 × 14 | 9338070141SST200 | 933807014 | — | — | — | — | — |
| M7 × 16 | 9338070161 | 933807016 | — | — | — | — | — |
| M7 × 20 | 9338070201 9338070201SST096 | 4017070201 933807020 | — | — | — | — | — |
| M7 × 25 | 9338070251 | 933807025 | — | — | — | — | — |
| M7 × 30 | 4017070302 9338070301 | 933807030 | — | — | — | — | — |
| M7 × 35 | 9338070351 9338070351SST096 | 933807035 | — | — | — | — | — |
| M7 × 40 | 9338070401 | — | — | — | — | — | — |
| M7 × 45 | 4017070452 9338070451 | 933807045 | — | — | — | — | — |
| M7 × 50 | 9338070501 9338070501SST200 | 933807050 | — | — | — | — | — |
Part numbers and designations are those of the original manufacturers and are given for identification. cBallast is an independent supplier; confirm ratings against the nameplate of the installed equipment before ordering. Table generated from the cBallast catalogue on 2026-09-29.