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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"

M3.0x0.5 Plain Thumb Screws

8mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5465 Steel 8mm 5mm M3.0x0.5 8mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.0x0.5
  • Thread Length: 8mm

9mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5466 Steel 8mm 5mm M3.0x0.5 9mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.0x0.5
  • Thread Length: 9mm

11mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5467 Steel 8mm 5mm M3.0x0.5 11mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.0x0.5
  • Thread Length: 11mm

13mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5468 Steel 8mm 5mm M3.0x0.5 13mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.0x0.5
  • Thread Length: 13mm

M3.5x0.6 Plain Thumb Screws

8mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5469 Steel 8mm 5mm M3.5x0.6 8mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.5x0.6
  • Thread Length: 8mm

9mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5470 Steel 8mm 5mm M3.5x0.6 9mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.5x0.6
  • Thread Length: 9mm

11mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5471 Steel 8mm 5mm M3.5x0.6 11mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.5x0.6
  • Thread Length: 11mm

13mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5472 Steel 8mm 5mm M3.5x0.6 13mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 5mm
  • Male Thread: M3.5x0.6
  • Thread Length: 13mm

M4.0x0.7 Plain Thumb Screws

9mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5473 Steel 10mm 5mm M4.0x0.7 9mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 5mm
  • Male Thread: M4.0x0.7
  • Thread Length: 9mm

11mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5474 Steel 10mm 5mm M4.0x0.7 11mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 5mm
  • Male Thread: M4.0x0.7
  • Thread Length: 11mm

13mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5475 Steel 10mm 5mm M4.0x0.7 13mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 5mm
  • Male Thread: M4.0x0.7
  • Thread Length: 13mm

14.0mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5476 Steel 10mm 5mm M4.0x0.7 14.0mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 5mm
  • Male Thread: M4.0x0.7
  • Thread Length: 14.0mm

16mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5477 Steel 10mm 5mm M4.0x0.7 16mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 5mm
  • Male Thread: M4.0x0.7
  • Thread Length: 16mm

M5.0x0.8 Plain Thumb Screws

9mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5478 Steel 11mm 5mm M5.0x0.8 9mm
  • Material: Steel
  • Head Diameter: 11mm
  • Head Length: 5mm
  • Male Thread: M5.0x0.8
  • Thread Length: 9mm

11mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5479 Steel 11mm 5mm M5.0x0.8 11mm
  • Material: Steel
  • Head Diameter: 11mm
  • Head Length: 5mm
  • Male Thread: M5.0x0.8
  • Thread Length: 11mm

13mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5480 Steel 11mm 5mm M5.0x0.8 13mm
  • Material: Steel
  • Head Diameter: 11mm
  • Head Length: 5mm
  • Male Thread: M5.0x0.8
  • Thread Length: 13mm

14.0mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5481 Steel 11mm 5mm M5.0x0.8 14.0mm
  • Material: Steel
  • Head Diameter: 11mm
  • Head Length: 5mm
  • Male Thread: M5.0x0.8
  • Thread Length: 14.0mm

16mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5482 Steel 11mm 5mm M5.0x0.8 16mm
  • Material: Steel
  • Head Diameter: 11mm
  • Head Length: 5mm
  • Male Thread: M5.0x0.8
  • Thread Length: 16mm

M6.0x1.0 Plain Thumb Screws

13mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5483 Steel 13mm 6mm M6.0x1.0 13mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 6mm
  • Male Thread: M6.0x1.0
  • Thread Length: 13mm

14.0mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5484 Steel 13mm 6mm M6.0x1.0 14.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 6mm
  • Male Thread: M6.0x1.0
  • Thread Length: 14.0mm

16mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5485 Steel 13mm 6mm M6.0x1.0 16mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 6mm
  • Male Thread: M6.0x1.0
  • Thread Length: 16mm

18.0mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5486 Steel 13mm 6mm M6.0x1.0 18.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 6mm
  • Male Thread: M6.0x1.0
  • Thread Length: 18.0mm

19mm

Part Number Material Head Diameter Head Length Male Thread Thread Length Details
ST5487 Steel 13mm 6mm M6.0x1.0 19mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 6mm
  • Male Thread: M6.0x1.0
  • Thread Length: 19mm