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/ INTERNAL TOOTH LOCK WASHER ZINC N/A 30000 QUOTE Add To Cart
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N/A #4-40 X 5/16 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 25000 $792.75 Add To Cart
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N/A #6-32 X 1/4 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 15000 QUOTE Add To Cart
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N/A #6-32 X 5/16 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $620.16 Add To Cart
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N/A #6-32 X 3/8 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 15000 $512.66 Add To Cart
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N/A #8-32 X 3/8 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 10000 $554.93 Add To Cart
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N/A #8-32 X 1/2 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCK WASHER ZINC N/A 8000 QUOTE Add To Cart
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