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1/4"-20 (6.35mm 20TPI)

A silicon bronze flat head slot drive machine screw. Usually alloy 651. American size 1/4"-20. That is 6.35mm dia and 20 threads per inch.



Product Image Weight- Item Name Price
1/4" x1" (6.35mm x 25mm) Flat Head Silicon Bronze Machine Screw 0.0064

1/4" x1" (6.35mm x 25mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$1.29

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1/4" x2" (6.35mm x 50mm) Flat Head Silicon Bronze Machine Screw 0.012

1/4" x2" (6.35mm x 50mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$1.72

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1/4" x2 1/2" (6.35mm x 63mm) Flat Head Silicon Bronze Machine Screw 0.014

1/4" x2 1/2" (6.35mm x 63mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$2.15

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1/4" x3" (6.35mm x 75mm) Flat Head Silicon Bronze Machine Screw 0.017

1/4" x3" (6.35mm x 75mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$2.79

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1/4" x4" (6.35mm x 100mm) Flat Head Silicon Bronze Machine Screw 0.022

1/4" x4" (6.35mm x 100mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$3.86

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1/4" x5" (6.35mm x 125mm) Flat Head Silicon Bronze Machine Screw 0.022

1/4" x5" (6.35mm x 125mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$12.66

Add:

1/4" x6" (6.35mm x 150mm) Flat Head Silicon Bronze Machine Screw 0.032

1/4" x6" (6.35mm x 150mm) Flat Head Silicon Bronze Machine Screw

A silicon bronze machine screw. They have a flat, counter sunk head with a slot drive. The thread form is UNC. The 6.35mm ones have 20 threads per...
$20.38

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