Sems are machine screws and freely-rotating, captive washers manufactured as one assembly. Sems are usually used as locking screws, with the washer providing the locking action. Machine pre-assembly of these two parts may provide cost savings to the end user, especially in high-volume applications for machine screws.
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Diameter

Pitch

Coarse

Length

Material

Carbon Steel

Finish

Zinc Plated

Type of Packages

Item #

Item Name

Package Quantity

Web Price

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N/A #10-24 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 6000 $354.22 Add To Cart
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N/A #10-24 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 6000 $439.27 Add To Cart
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N/A #10-24 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 5000 $330.88 Add To Cart
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N/A #10-24 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 4000 $327.71 Add To Cart
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N/A #10-32 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 8000 $440.79 Add To Cart
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N/A #10-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 7000 QUOTE Add To Cart
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N/A #10-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 100 $14.15 Add To Cart
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N/A #10-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 6000 QUOTE Add To Cart
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N/A #10-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 6000 QUOTE Add To Cart
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N/A #10-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 5000 $402.02 Add To Cart
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N/A #10-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 4000 $350.60 Add To Cart
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N/A 1/4-20 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 2000 $341.04 Add To Cart
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N/A 1/4-20 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 3000 $335.79 Add To Cart
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N/A 1/4-20 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 3000 $340.67 Add To Cart
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N/A 1/4-20 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 2500 $342.38 Add To Cart
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N/A 1/4-20 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 2000 $276.36 Add To Cart
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N/A #6-32 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $455.18 Add To Cart
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N/A #4-40 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 40000 $961.80 Add To Cart
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N/A #4-40 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 25000 QUOTE Add To Cart
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N/A #4-40 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 25000 $720.56 Add To Cart
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N/A #4-40 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 25000 $889.88 Add To Cart
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N/A #4-40 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 20000 $650.48 Add To Cart
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N/A #4-40 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $527.63 Add To Cart
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N/A #4-40 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 75 $5.96 Add To Cart
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N/A #6-32 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 8000 $361.62 Add To Cart
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