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Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Twice as strong as low-strength steel screws, these metric Class 8.8 steel screws can be used to fasten most machinery and equipment. Dimensions meet ISO (formerly DIN) or DIN specifications. Length is measured from under the head.
Zinc-plated steel screws are a good choice for most applications. They resist corrosion in wet environments.
Steel screws are best for dry environments, since moisture will cause them to rust. They require little surface prep before applying a finish, so you can apply your own paint or coating.
Match the thread spacing of mating components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Head | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Wd., mm | Ht., mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Class 8.8 Steel | ||||||||||
M8 × 1 mm | ||||||||||
40 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 25 | 000000000 | 000000 |
45 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 0000 |
50 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 25 | 000000000 | 00000 |
55 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 0000 |
60 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 0000 |
65 | Partially Threaded | 20 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, DIN 960 | 10 | 000000000 | 0000 |
70 | Partially Threaded | 22 | Fine | 13 | 5.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 0000 |
80 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
100 | Partially Threaded | 22 | Fine | 13 | 5.3 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
M10 × 1.25 mm | ||||||||||
35 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
40 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
45 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
50 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
55 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
60 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
65 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
70 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
75 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
80 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
90 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 0000 |
100 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
110 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
120 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
130 | Partially Threaded | 32 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, DIN 960 | 5 | 000000000 | 00000 |
M10 × 1 mm | ||||||||||
40 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 0000 |
45 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
50 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
60 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 0000 |
80 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
100 | Partially Threaded | 26 | Extra Fine | 17 | 6.4 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
M12 × 1.5 mm | ||||||||||
40 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
45 | Partially Threaded | 30 | Fine | 19 | 7.7 | 110,000 | ISO 898-1, DIN 960 | 5 | 000000000 | 0000 |
50 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
55 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
60 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
65 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
70 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
75 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
80 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
90 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
100 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
120 | Partially Threaded | 30 | Fine | 19 | 7.5 | 110,000 | ISO 898-1, DIN 960 | 1 | 000000000 | 0000 |
M12 × 1.25 mm | ||||||||||
40 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
45 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
50 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
55 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 0000 |
60 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 10 | 000000000 | 00000 |
65 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
70 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
75 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
80 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
90 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
100 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
110 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
120 | Partially Threaded | 30 | Extra Fine | 19 | 7.5 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
M14 × 1.5 mm | ||||||||||
45 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
50 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
60 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
65 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
70 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
75 | Partially Threaded | 34 | Fine | 22 | 9 | 110,000 | ISO 898-1, DIN 960 | 1 | 000000000 | 0000 |
80 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
90 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
120 | Partially Threaded | 34 | Fine | 22 | 8.8 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
M16 × 1.5 mm | ||||||||||
50 | Partially Threaded | 38 | Fine | 24 | 10 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
55 | Partially Threaded | 38 | Fine | 24 | 10.2 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 5 | 000000000 | 00000 |
60 | Partially Threaded | 38 | Fine | 24 | 10 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
70 | Partially Threaded | 38 | Fine | 24 | 10 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
80 | Partially Threaded | 38 | Fine | 24 | 10 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
90 | Partially Threaded | 38 | Fine | 24 | 10.2 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 38 | Fine | 24 | 10 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
120 | Partially Threaded | 38 | Fine | 24 | 10.2 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
M18 × 1.5 mm | ||||||||||
65 | Partially Threaded | 42 | Fine | 27 | 11.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
70 | Partially Threaded | 42 | Fine | 27 | 11.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
80 | Partially Threaded | 42 | Fine | 27 | 11.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
90 | Partially Threaded | 42 | Fine | 27 | 11.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 42 | Fine | 27 | 11.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
M20 × 1.5 mm | ||||||||||
80 | Partially Threaded | 46 | Extra Fine | 30 | 12.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 46 | Extra Fine | 30 | 12.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
120 | Partially Threaded | 46 | Extra Fine | 30 | 12.7 | 110,000 | ISO 898-1, ISO 8765, DIN 960 | 1 | 000000000 | 0000 |
Class 8.8 Steel | ||||||||||
M10 × 1.25 mm | ||||||||||
50 | Partially Threaded | 26 | Fine | 17 | 6.6 | 110,000 | ISO 898-1, DIN 960 | 10 | 000000000 | 0000 |
80 | Partially Threaded | 26 | Fine | 17 | 6.6 | 110,000 | ISO 898-1, DIN 960 | 10 | 000000000 | 00000 |
90 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, DIN 960 | 5 | 000000000 | 0000 |
100 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, DIN 960 | 5 | 000000000 | 0000 |
120 | Partially Threaded | 26 | Fine | 17 | 6.4 | 110,000 | ISO 898-1, DIN 960 | 5 | 000000000 | 0000 |
High-Strength Metric Class 10.9 Steel Hex Head Screws

Choose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Dimensions meet ISO (formerly DIN) or DIN specifications. Length is measured from under the head.
Zinc yellow-chromate plated steel and zinc-plated steel screws are a good choice for most applications and resist corrosion in wet environments. Those that are blue dyed are easy to distinguish.
Match the thread spacing of mating components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Head | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Wd., mm | Ht., mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Class 10.9 Steel | ||||||||||
M8 × 1 mm | ||||||||||
35 | Partially Threaded | 22 | Fine | 13 | 5.5 | 150,000 | DIN 960 | 10 | 000000000 | 000000 |
M10 × 1.25 mm | ||||||||||
45 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 0000 |
70 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
75 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
80 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
90 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
100 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
110 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
120 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
M12 × 1.5 mm | ||||||||||
60 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
70 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
75 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
80 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
90 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
Blue-Dyed Zinc-Plated Class 10.9 Steel | ||||||||||
M10 × 1.25 mm | ||||||||||
45 | Partially Threaded | 26 | Fine | 17 | 6.6 | 150,000 | DIN 960 | 5 | 000000000 | 00000 |
M12 × 1.5 mm | ||||||||||
60 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
70 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
80 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
90 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |
100 | Partially Threaded | 30 | Fine | 19 | 7.7 | 150,000 | DIN 960 | 1 | 000000000 | 0000 |