Fasten these screws inside a high-vacuum system without bringing in contaminants. They are cleaned and double-bagged in an ISO Class 5 (Fed. Std. Class 100) clean room to eliminate impurities. A vent through the center allows fluids and gases to escape, which reduces the time it takes to reach vacuum conditions. These screws are 18-8 stainless steel, which emits less gas than most metals and stands up to corrosive chemicals. Length is measured from under the head.

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

Head

Lg. Threading Thread

Spacing Dia. Ht. Drive Size Vent

Dia. Tensile

Strength, psi Environmental Rating Specifications Met Each

18-8 Stainless Steel

4-40

1/2" Fully Threaded Coarse 0.183" 0.112" 3/32" 0.036" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A110 $15.44

3/4" Fully Threaded Coarse 0.183" 0.112" 3/32" 0.036" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A160 19.86

1" Fully Threaded Coarse 0.183" 0.112" 3/32" 0.036" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A210 25.27

6-32

1/2" Fully Threaded Coarse 0.226" 0.138" 7/64" 0.04" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A120 14.69

3/4" Fully Threaded Coarse 0.226" 0.138" 7/64" 0.04" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A170 16.49

1" Fully Threaded Coarse 0.226" 0.138" 7/64" 0.04" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A220 19.81

8-32

1/2" Fully Threaded Coarse 0.27" 0.164" 9/64" 0.042" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A130 14.63

3/4" Fully Threaded Coarse 0.27" 0.164" 9/64" 0.042" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A180 16.26

1" Fully Threaded Coarse 0.27" 0.164" 9/64" 0.042" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A230 18.99

10-32

1/2" Fully Threaded Fine 5/16" 0.19" 5/32" 0.052" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A140 14.38

3/4" Fully Threaded Fine 5/16" 0.19" 5/32" 0.052" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A190 15.07

1" Fully Threaded Fine 5/16" 0.19" 5/32" 0.052" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A240 17.38

1/4"-20

1/2" Fully Threaded Coarse 3/8" 1/4" 3/16" 0.063" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A150 14.22

3/4" Fully Threaded Coarse 3/8" 1/4" 3/16" 0.063" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A200 14.96

1" Fully Threaded Coarse 3/8" 1/4" 3/16" 0.063" 70,000 Fed. Std. Class 100, ISO Class 5 ASME B18.3 90841A250 17.05

M3 × 0.5 mm

8mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A260 14.31

10mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A300 14.80

12mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A340 15.27

M4 × 0.7 mm

8mm Fully Threaded Coarse 7mm 4mm 3 mm 1.1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A270 14.69

10mm Fully Threaded Coarse 7mm 4mm 3 mm 1.1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A310 15.00

12mm Fully Threaded Coarse 7mm 4mm 3 mm 1.1mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A350 15.29

M5 × 0.8 mm

8mm Fully Threaded Coarse 8.5mm 5mm 4 mm 1.3mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A280 14.22

10mm Fully Threaded Coarse 8.5mm 5mm 4 mm 1.3mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A320 14.15

12mm Fully Threaded Coarse 8.5mm 5mm 4 mm 1.3mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A360 14.52

M6 × 1 mm

8mm Fully Threaded Coarse 10mm 6mm 5 mm 1.6mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A290 14.61

10mm Fully Threaded Coarse 10mm 6mm 5 mm 1.6mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A330 14.29

12mm Fully Threaded Coarse 10mm 6mm 5 mm 1.6mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90841A370 14.61