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 #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 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 5/16 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 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 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $455.18 Add To Cart
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N/A #6-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 15000 QUOTE Add To Cart
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N/A #6-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $481.56 Add To Cart
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N/A #6-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 $382.46 Add To Cart
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N/A #6-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 $416.59 Add To Cart
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N/A #6-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 QUOTE 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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N/A #6-32 X 1 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 8000 $431.34 Add To Cart
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N/A #8-32 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 QUOTE Add To Cart
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N/A #8-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 $449.14 Add To Cart
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N/A #8-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 10000 $483.79 Add To Cart
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N/A #8-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 8000 $468.72 Add To Cart
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N/A #8-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 8000 $504.63 Add To Cart
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N/A #8-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 7000 $437.88 Add To Cart
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N/A #8-32 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 5000 $321.30 Add To Cart
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N/A #8-32 X 1 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCK WASHER ZINC N/A 5000 $485.36 Add To Cart
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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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