Screws are 18-8 stainless steel for good chemical resistance. They may be mildly magnetic. Also known as Sems screws, they have a permanently attached but freely rotating split lock washer that adds tension to resist loosening from vibration. All screws meet ASTM F837 specifications and testing requirements for material quality. Length is measured from under the head.

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

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

Head

Lg. Threading Thread

Spacing Dia. Ht. Washer

Thick. Drive

Size Tensile

Strength, psi Specifications

Met Each

18-8 Stainless Steel

6-32

1/4" Fully Threaded Coarse 0.226" 0.138" 0.04" 7/64" 70,000 ASTM F837 94912A100 $2.40

3/8" Fully Threaded Coarse 0.226" 0.138" 0.04" 7/64" 70,000 ASTM F837 94912A105 2.40

1/2" Fully Threaded Coarse 0.226" 0.138" 0.04" 7/64" 70,000 ASTM F837 94912A110 2.42

3/4" Fully Threaded Coarse 0.226" 0.138" 0.04" 7/64" 70,000 ASTM F837 94912A115 2.42

8-32

3/8" Fully Threaded Coarse 0.27" 0.164" 3/64" 9/64" 70,000 ASTM F837 94912A220 2.45

1/2" Fully Threaded Coarse 0.27" 0.164" 3/64" 9/64" 70,000 ASTM F837 94912A225 2.46

5/8" Fully Threaded Coarse 0.27" 0.164" 3/64" 9/64" 70,000 ASTM F837 94912A230 2.48

3/4" Fully Threaded Coarse 0.27" 0.164" 3/64" 9/64" 70,000 ASTM F837 94912A235 2.50

1" Fully Threaded Coarse 0.27" 0.164" 3/64" 9/64" 70,000 ASTM F837 94912A240 2.53

10-32

1/2" Fully Threaded Fine 5/16" 0.19" 3/64" 5/32" 70,000 ASTM F837 94912A330 2.52

5/8" Fully Threaded Fine 5/16" 0.19" 3/64" 5/32" 70,000 ASTM F837 94912A335 2.54

3/4" Fully Threaded Fine 5/16" 0.19" 3/64" 5/32" 70,000 ASTM F837 94912A340 2.56

1" Fully Threaded Fine 5/16" 0.19" 3/64" 5/32" 70,000 ASTM F837 94912A345 2.62

1/4"-20

1/2" Fully Threaded Coarse 3/8" 1/4" 1/16" 3/16" 70,000 ASTM F837 94912A450 2.67

5/8" Fully Threaded Coarse 3/8" 1/4" 1/16" 3/16" 70,000 ASTM F837 94912A455 2.71

3/4" Fully Threaded Coarse 3/8" 1/4" 1/16" 3/16" 70,000 ASTM F837 94912A460 2.75

1" Fully Threaded Coarse 3/8" 1/4" 1/16" 3/16" 70,000 ASTM F837 94912A465 2.82

1 1/4" Fully Threaded Coarse 3/8" 1/4" 1/16" 3/16" 70,000 ASTM F837 94912A470 3.00