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Plain Thumb Screws

Thumb Screws come in all common threads with a variety of thread lengths. The high quality knurl allows for an easy grip to hand tighten these screws into place, but have also been used for their decorative and unique appearance.

#4-40 Plain Thumb Screws

5/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7620 Steel 5/16" 3/16" #4-40 5/16"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #4-40
  • Thread Length: 5/16"

3/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7621 Steel 5/16" 3/16" #4-40 3/8"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #4-40
  • Thread Length: 3/8"

7/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7622 Steel 5/16" 3/16" #4-40 7/16"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #4-40
  • Thread Length: 7/16"

1/2"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7623 Steel 5/16" 3/16" #4-40 1/2"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #4-40
  • Thread Length: 1/2"

#6-32 Plain Thumb Screws

5/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7624 Steel 5/16" 3/16" #6-32 5/16"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #6-32
  • Thread Length: 5/16"

3/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7625 Steel 5/16" 3/16" #6-32 3/8"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #6-32
  • Thread Length: 3/8"

7/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7626 Steel 5/16" 3/16" #6-32 7/16"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #6-32
  • Thread Length: 7/16"

1/2"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7627 Steel 5/16" 3/16" #6-32 1/2"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 3/16"
  • Male Thread: #6-32
  • Thread Length: 1/2"

#8-32 Plain Thumb Screws

3/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7628 Steel 3/8" 3/16" #8-32 3/8"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 3/16"
  • Male Thread: #8-32
  • Thread Length: 3/8"

7/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7629 Steel 3/8" 3/16" #8-32 7/16"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 3/16"
  • Male Thread: #8-32
  • Thread Length: 7/16"

1/2"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7630 Steel 3/8" 3/16" #8-32 1/2"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 3/16"
  • Male Thread: #8-32
  • Thread Length: 1/2"

9/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7631 Steel 3/8" 3/16" #8-32 9/16"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 3/16"
  • Male Thread: #8-32
  • Thread Length: 9/16"

5/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7632 Steel 3/8" 3/16" #8-32 5/8"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 3/16"
  • Male Thread: #8-32
  • Thread Length: 5/8"

#10-32 Plain Thumb Screws

3/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7633 Steel 7/16" 3/16" #10-32 3/8"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 3/16"
  • Male Thread: #10-32
  • Thread Length: 3/8"

7/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7634 Steel 7/16" 3/16" #10-32 7/16"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 3/16"
  • Male Thread: #10-32
  • Thread Length: 7/16"

1/2"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7635 Steel 7/16" 3/16" #10-32 1/2"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 3/16"
  • Male Thread: #10-32
  • Thread Length: 1/2"

9/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7636 Steel 7/16" 3/16" #10-32 9/16"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 3/16"
  • Male Thread: #10-32
  • Thread Length: 9/16"

5/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7637 Steel 7/16" 3/16" #10-32 5/8"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 3/16"
  • Male Thread: #10-32
  • Thread Length: 5/8"

#1/4-20 Plain Thumb Screws

1/2"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7638 Steel 1/2" 1/4" #1/4-20 1/2"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 1/4"
  • Male Thread: #1/4-20
  • Thread Length: 1/2"

9/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7639 Steel 1/2" 1/4" #1/4-20 9/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 1/4"
  • Male Thread: #1/4-20
  • Thread Length: 9/16"

5/8"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7640 Steel 1/2" 1/4" #1/4-20 5/8"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 1/4"
  • Male Thread: #1/4-20
  • Thread Length: 5/8"

11/16"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7641 Steel 1/2" 1/4" #1/4-20 11/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 1/4"
  • Male Thread: #1/4-20
  • Thread Length: 11/16"

3/4"

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST7642 Steel 1/2" 1/4" #1/4-20 3/4"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 1/4"
  • Male Thread: #1/4-20
  • Thread Length: 3/4"