Cleaned and double bagged in an ISO Class 5 (Fed. Std. Class 100) clean room, these screws are ready to use on chambers and components in high-vacuum systems. 18-8 stainless steel releases gas at a slower rate than other metals, allowing your system to achieve higher levels of vacuum. Screws are silver plated for lubricity, reducing wear over time. 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 Tensile

Strength, psi Environmental Rating Specifications Met Each

Silver-Plated 18-8 Stainless Steel

4-40

1/2" Fully Threaded Coarse 0.183" 0.112" 3/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A110 $14.07

3/4" Fully Threaded Coarse 0.183" 0.112" 3/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A160 14.22

1" Fully Threaded Coarse 0.183" 0.112" 3/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A210 14.46

6-32

1/2" Fully Threaded Coarse 0.226" 0.138" 7/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A120 14.61

3/4" Fully Threaded Coarse 0.226" 0.138" 7/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A170 14.80

1" Fully Threaded Coarse 0.226" 0.138" 7/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A220 14.98

8-32

1/2" Fully Threaded Coarse 0.27" 0.164" 9/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A130 15.31

3/4" Fully Threaded Coarse 0.27" 0.164" 9/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A180 15.44

1" Fully Threaded Coarse 0.27" 0.164" 9/64" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A230 15.48

10-32

1/2" Fully Threaded Fine 5/16" 0.19" 5/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A140 15.39

3/4" Fully Threaded Fine 5/16" 0.19" 5/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A190 15.60

1" Fully Threaded Fine 5/16" 0.19" 5/32" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A240 15.76

1/4"-20

1/2" Fully Threaded Coarse 3/8" 1/4" 3/16" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A150 18.64

3/4" Fully Threaded Coarse 3/8" 1/4" 3/16" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A200 18.48

1" Fully Threaded Coarse 3/8" 1/4" 3/16" 70,000 Fed. Std. Class 100, ISO Class 5 __ 90843A250 19.14

M3 × 0.5 mm

8mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A260 14.40

10mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A300 14.40

12mm Fully Threaded Coarse 5.5mm 3mm 2.5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A340 14.35

M4 × 0.7 mm

8mm Fully Threaded Coarse 7mm 4mm 3 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A270 15.46

10mm Fully Threaded Coarse 7mm 4mm 3 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A310 15.31

12mm Fully Threaded Coarse 7mm 4mm 3 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A350 15.55

M5 × 0.8 mm

8mm Fully Threaded Coarse 8.5mm 5mm 4 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A280 15.60

10mm Fully Threaded Coarse 8.5mm 5mm 4 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A320 15.39

12mm Fully Threaded Coarse 8.5mm 5mm 4 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A360 15.51

M6 × 1 mm

8mm Fully Threaded Coarse 10mm 6mm 5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A290 18.60

10mm Fully Threaded Coarse 10mm 6mm 5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A330 18.49

12mm Fully Threaded Coarse 10mm 6mm 5 mm 70,000 Fed. Std. Class 100, ISO Class 5 DIN 912, ISO 4762 90843A370 18.48