Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Screws that meet ASTM A574 comply with specifications and testing requirements for material quality. Screws that meet ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Head

Lg. Threading Thread

Spacing Dia. Ht. Drive

Size Tensile

Strength, psi Specifications

Met Each

Black-Oxide Alloy Steel

6-32

3/8" Fully Threaded Coarse 0.226" 0.138" 7/64" 170,000 ASTM A574 91670A146 $13.55

1/2" Fully Threaded Coarse 0.226" 0.138" 7/64" 170,000 ASTM A574 91670A148 15.17

8-32

1/2" Fully Threaded Coarse 0.27" 0.164" 9/64" 170,000 ASTM A574 91670A194 8.59

1" Fully Threaded Coarse 0.27" 0.164" 9/64" 170,000 ASTM A574 91670A199 10.45

10-32

1/2" Fully Threaded Fine 5/16" 0.19" 5/32" 170,000 ASTM A574 91670A310 8.34

3/4" Fully Threaded Fine 5/16" 0.19" 5/32" 170,000 ASTM A574 91670A313 9.38

1" Fully Threaded Fine 5/16" 0.19" 5/32" 170,000 ASTM A574 91670A316 11.83

1 1/2" Fully Threaded Fine 5/16" 0.19" 5/32" 170,000 ASTM A574 91670A319 14.00

1/4"-20

1/2" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A537 8.38

5/8" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A539 9.28

3/4" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A540 9.79

1" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A542 11.41

1 1/4" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A544 11.62

1 1/2" Fully Threaded Coarse 3/8" 1/4" 3/16" 170,000 ASTM A574 91670A546 13.00

5/16"-18

3/4" Fully Threaded Coarse 15/32" 5/16" 1/4" 170,000 ASTM A574 91670A581 11.62

1" Fully Threaded Coarse 15/32" 5/16" 1/4" 170,000 ASTM A574 91670A583 12.00

1 1/4" Fully Threaded Coarse 15/32" 5/16" 1/4" 170,000 ASTM A574 91670A585 12.34

1 1/2" Fully Threaded Coarse 15/32" 5/16" 1/4" 170,000 ASTM A574 91670A587 14.00

2" Fully Threaded Coarse 15/32" 5/16" 1/4" 170,000 ASTM A574 91670A589 16.00

3/8"-16

3/4" Fully Threaded Coarse 9/16" 3/8" 5/16" 170,000 ASTM A574 91670A622 14.34

1" Fully Threaded Coarse 9/16" 3/8" 5/16" 170,000 ASTM A574 91670A624 16.38

1 1/4" Fully Threaded Coarse 9/16" 3/8" 5/16" 170,000 ASTM A574 91670A626 16.79

1/2"-13

1" Fully Threaded Coarse 3/4" 1/2" 3/8" 170,000 ASTM A574 91670A713 15.21

1 1/2" Fully Threaded Coarse 3/4" 1/2" 3/8" 170,000 ASTM A574 91670A716 18.79

2" Fully Threaded Coarse 3/4" 1/2" 3/8" 170,000 ASTM A574 91670A720 19.59

Head

Lg.,

mm Threading Min. Thread

Lg., mm Thread

Spacing Dia.,

mm Ht.,

mm Drive

Size, mm Tensile

Strength, psi Specifications Met Each

Black-Oxide Class 12.9 Alloy Steel

M4 × 0.7 mm

6 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A002 $16.60

8 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A003 18.18

10 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A004 16.33

12 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A005 18.56

16 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A007 18.00

20 Fully Threaded __ Coarse 7 4 3 170,000 DIN 912, ISO 4762 90605A009 18.85

M5 × 0.8 mm

12 Fully Threaded __ Coarse 8.5 5 4 170,000 DIN 912, ISO 4762 90605A125 13.33

16 Fully Threaded __ Coarse 8.5 5 4 170,000 DIN 912, ISO 4762 90605A127 14.44

20 Fully Threaded __ Coarse 8.5 5 4 170,000 DIN 912, ISO 4762 90605A129 14.61

25 Partially Threaded 22 Coarse 8.5 5 4 170,000 DIN 912, ISO 4762 90605A131 11.82

M6 × 1 mm

12 Fully Threaded __ Coarse 10 6 5 170,000 DIN 912, ISO 4762 90605A163 14.45

16 Fully Threaded __ Coarse 10 6 5 170,000 DIN 912, ISO 4762 90605A164 13.33

20 Fully Threaded __ Coarse 10 6 5 170,000 DIN 912, ISO 4762 90605A165 13.48

25 Partially Threaded 24 Coarse 10 6 5 170,000 DIN 912, ISO 4762 90605A167 14.67

30 Partially Threaded 24 Coarse 10 6 5 170,000 DIN 912, ISO 4762 90605A169 11.24

M8 × 1.25 mm

16 Fully Threaded __ Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A251 14.44

20 Fully Threaded __ Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A252 13.49

25 Fully Threaded __ Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A254 15.11

30 Partially Threaded 28 Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A256 15.28

35 Partially Threaded 28 Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A257 13.89

40 Partially Threaded 28 Coarse 13 8 6 170,000 DIN 912, ISO 4762 90605A258 15.73

M10 × 1.5 mm

20 Fully Threaded __ Coarse 16 10 8 170,000 DIN 912, ISO 4762 90605A302 13.78

25 Fully Threaded __ Coarse 16 10 8 170,000 DIN 912, ISO 4762 90605A303 15.56

30 Fully Threaded __ Coarse 16 10 8 170,000 DIN 912, ISO 4762 90605A305 15.73

35 Partially Threaded 32 Coarse 16 10 8 170,000 DIN 912, ISO 4762 90605A307 15.78

40 Partially Threaded 32 Coarse 16 10 8 170,000 DIN 912, ISO 4762 90605A309 13.33

M12 × 1.75 mm

25 Fully Threaded __ Coarse 18 12 10 170,000 DIN 912, ISO 4762 90605A336 16.25

30 Fully Threaded __ Coarse 18 12 10 170,000 DIN 912, ISO 4762 90605A338 16.42

40 Partially Threaded 36 Coarse 18 12 10 170,000 DIN 912, ISO 4762 90605A341 16.60

50 Partially Threaded 36 Coarse 18 12 10 170,000 DIN 912, ISO 4762 90605A342 16.81