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Thumb Nuts

Thumb nuts offer a unique and finished look that allow for a nut to be tightened without tools. Lyn-Tron's thumb nuts are offered in all common female threads and in both the round knurled thumb nuts and hex style thumb nuts. Thumb nuts can be used to secure electrical wiring in electrical components or to temporarily fasten parts that need adjustments, changing, or removing frequently.

Selecting Thumb Nuts

The two types of thumb nuts allow for two different types of tightening of the nut. The round nut is knurled to allow for an easy grip by hand while the hex thumb provides the option for tightening by using a wrench. The material selection for our thumb nuts are:

  • Stainless Steel
  • Steel
  • Brass

In addition to offering thumb nuts in round and hex, Lyn-Tron carries a full line of thread types in both inch and metric. If you don’t see the thread size you need, feel free to contact us directly

Didn’t find what you need? Contact Us for your project specific requirements.

Lyn-Tron has been manufacturing electronic components and hardware items for over 50 years! All Lyn-Tron electronic hardware is made in the USA and held to the highest quality standards. Our custom hardware goes through the same quality standards so customers will always receive a product they can trust.

Contact us today if you have any questions about selecting thumb nuts for your products. We are open to discuss any custom designs or unique needs your project requires.

Contact Lyn-Tron Inc | Electronic Components Suppliers

#2-56 Thumb Nuts

1/4"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7710 Steel 1/4" 1/8" #2-56 3/16" 1/8"
  • Material: Steel
  • Head Diameter: 1/4"
  • Head Length: 1/8"
  • Female Thread: #2-56
  • Washer Diameter: 3/16"
  • Washer Length: 1/8"
ST7719 Steel 1/4" 1/8" #2-56 3/16" 1/8"
  • Material: Steel
  • Head Diameter: 1/4"
  • Head Length: 1/8"
  • Female Thread: #2-56
  • Washer Diameter: 3/16"
  • Washer Length: 1/8"

#4-40 Thumb Nuts

5/16"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7711 Steel 5/16" 1/8" #4-40 1/4" 1/8"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 1/8"
  • Female Thread: #4-40
  • Washer Diameter: 1/4"
  • Washer Length: 1/8"
ST7720 Steel 5/16" 1/8" #4-40 1/4" 1/8"
  • Material: Steel
  • Head Diameter: 5/16"
  • Head Length: 1/8"
  • Female Thread: #4-40
  • Washer Diameter: 1/4"
  • Washer Length: 1/8"

#6-32 Thumb Nuts

3/8"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7712 Steel 3/8" 1/8" #6-32 11/32" 5/32"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 1/8"
  • Female Thread: #6-32
  • Washer Diameter: 11/32"
  • Washer Length: 5/32"
ST7721 Steel 3/8" 1/8" #6-32 11/32" 5/32"
  • Material: Steel
  • Head Diameter: 3/8"
  • Head Length: 1/8"
  • Female Thread: #6-32
  • Washer Diameter: 11/32"
  • Washer Length: 5/32"

#8-32 Thumb Nuts

7/16"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7713 Steel 7/16" 1/8" #8-32 3/8" 5/32"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 1/8"
  • Female Thread: #8-32
  • Washer Diameter: 3/8"
  • Washer Length: 5/32"
ST7722 Steel 7/16" 1/8" #8-32 3/8" 5/32"
  • Material: Steel
  • Head Diameter: 7/16"
  • Head Length: 1/8"
  • Female Thread: #8-32
  • Washer Diameter: 3/8"
  • Washer Length: 5/32"

#10-24 Thumb Nuts

1/2"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7714 Steel 1/2" 5/32" #10-24 13/32" 3/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 5/32"
  • Female Thread: #10-24
  • Washer Diameter: 13/32"
  • Washer Length: 3/16"
ST7723 Steel 1/2" 5/32" #10-24 13/32" 3/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 5/32"
  • Female Thread: #10-24
  • Washer Diameter: 13/32"
  • Washer Length: 3/16"

#10-32 Thumb Nuts

1/2"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7715 Steel 1/2" 5/32" #10-32 13/32" 3/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 5/32"
  • Female Thread: #10-32
  • Washer Diameter: 13/32"
  • Washer Length: 3/16"
ST7724 Steel 1/2" 5/32" #10-32 13/32" 3/16"
  • Material: Steel
  • Head Diameter: 1/2"
  • Head Length: 5/32"
  • Female Thread: #10-32
  • Washer Diameter: 13/32"
  • Washer Length: 3/16"

#1/4-20 Thumb Nuts

9/16"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7716 Steel 9/16" 5/32" #1/4-20 15/32" 7/32"
  • Material: Steel
  • Head Diameter: 9/16"
  • Head Length: 5/32"
  • Female Thread: #1/4-20
  • Washer Diameter: 15/32"
  • Washer Length: 7/32"
ST7725 Steel 9/16" 5/32" #1/4-20 15/32" 7/32"
  • Material: Steel
  • Head Diameter: 9/16"
  • Head Length: 5/32"
  • Female Thread: #1/4-20
  • Washer Diameter: 15/32"
  • Washer Length: 7/32"

#5/16-18 Thumb Nuts

5/8"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7717 Steel 5/8" 3/16" #5/16-18 17/32" 7/32"
  • Material: Steel
  • Head Diameter: 5/8"
  • Head Length: 3/16"
  • Female Thread: #5/16-18
  • Washer Diameter: 17/32"
  • Washer Length: 7/32"

#3/8-16 Thumb Nuts

3/4"

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST7718 Steel 3/4" 7/32" #3/8-16 5/8" 1/4"
  • Material: Steel
  • Head Diameter: 3/4"
  • Head Length: 7/32"
  • Female Thread: #3/8-16
  • Washer Diameter: 5/8"
  • Washer Length: 1/4"

M2.5x0.45 Thumb Nuts

6mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5560 Steel 6mm 3.0mm M2.5x0.45 5.0mm 3.0mm
  • Material: Steel
  • Head Diameter: 6mm
  • Head Length: 3.0mm
  • Female Thread: M2.5x0.45
  • Washer Diameter: 5.0mm
  • Washer Length: 3.0mm
ST5580 Steel 6mm 3.0mm M2.5x0.45 5.0mm 3.0mm
  • Material: Steel
  • Head Diameter: 6mm
  • Head Length: 3.0mm
  • Female Thread: M2.5x0.45
  • Washer Diameter: 5.0mm
  • Washer Length: 3.0mm

M3.0x0.5 Thumb Nuts

8mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5561 Steel 8mm 3.0mm M3.0x0.5 6.0mm 3.0mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 3.0mm
  • Female Thread: M3.0x0.5
  • Washer Diameter: 6.0mm
  • Washer Length: 3.0mm
ST5581 Steel 8mm 3.0mm M3.0x0.5 6.0mm 3.0mm
  • Material: Steel
  • Head Diameter: 8mm
  • Head Length: 3.0mm
  • Female Thread: M3.0x0.5
  • Washer Diameter: 6.0mm
  • Washer Length: 3.0mm

M3.5x0.6 Thumb Nuts

10mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5562 Steel 10mm 3.0mm M3.5x0.6 9.0mm 4.0mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 3.0mm
  • Female Thread: M3.5x0.6
  • Washer Diameter: 9.0mm
  • Washer Length: 4.0mm
ST5582 Steel 10mm 3.0mm M3.5x0.6 9.0mm 4.0mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 3.0mm
  • Female Thread: M3.5x0.6
  • Washer Diameter: 9.0mm
  • Washer Length: 4.0mm

M4.0x0.7 Thumb Nuts

10mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5563 Steel 10mm 3.0mm M4.0x0.7 9.0mm 4.0mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 3.0mm
  • Female Thread: M4.0x0.7
  • Washer Diameter: 9.0mm
  • Washer Length: 4.0mm
ST5583 Steel 10mm 3.0mm M4.0x0.7 9.0mm 4.0mm
  • Material: Steel
  • Head Diameter: 10mm
  • Head Length: 3.0mm
  • Female Thread: M4.0x0.7
  • Washer Diameter: 9.0mm
  • Washer Length: 4.0mm

M5.0x0.8 Thumb Nuts

13mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5564 Steel 13mm 4mm M5.0x0.8 11.0mm 5.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 4mm
  • Female Thread: M5.0x0.8
  • Washer Diameter: 11.0mm
  • Washer Length: 5.0mm
ST5584 Steel 13mm 4mm M5.0x0.8 11.0mm 5.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 4mm
  • Female Thread: M5.0x0.8
  • Washer Diameter: 11.0mm
  • Washer Length: 5.0mm

M6.0x1.0 Thumb Nuts

13mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5565 Steel 13mm 4mm M6.0x1.0 12.0mm 5.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 4mm
  • Female Thread: M6.0x1.0
  • Washer Diameter: 12.0mm
  • Washer Length: 5.0mm
ST5585 Steel 13mm 4mm M6.0x1.0 12.0mm 5.0mm
  • Material: Steel
  • Head Diameter: 13mm
  • Head Length: 4mm
  • Female Thread: M6.0x1.0
  • Washer Diameter: 12.0mm
  • Washer Length: 5.0mm

M8.0x1.25 Thumb Nuts

19.0mm

Part Number Material Head Diameter Head Length Female Thread Washer Diameter Washer Length Details
ST5566 Steel 19.0mm 6mm M8.0x1.25 16.0mm 6.0mm
  • Material: Steel
  • Head Diameter: 19.0mm
  • Head Length: 6mm
  • Female Thread: M8.0x1.25
  • Washer Diameter: 16.0mm
  • Washer Length: 6.0mm
ST5586 Steel 19.0mm 6mm M8.0x1.25 16.0mm 6.0mm
  • Material: Steel
  • Head Diameter: 19.0mm
  • Head Length: 6mm
  • Female Thread: M8.0x1.25
  • Washer Diameter: 16.0mm
  • Washer Length: 6.0mm