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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 Fine

Length

Material

Carbon Steel

Finish

Zinc Plated

Item #

Item Name

Type

Diameter

Pitch

Length

Material

Finish

Package Quantity

Web Price

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N/A #8-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 7000 $165.73 Add To Cart
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N/A #8-32 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 1 N/A Carbon Steel N/A Zinc Plated N/A 5000 $143.75 Add To Cart
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N/A #10-32 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 8000 $181.40 Add To Cart
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N/A #10-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 7000 $163.98 Add To Cart
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N/A #10-24 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 6000 $153.00 Add To Cart
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N/A #10-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 6000 $132.45 Add To Cart
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N/A #10-24 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Coarse N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 6000 $164.40 Add To Cart
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N/A #10-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 6000 $161.25 Add To Cart
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N/A #10-24 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Coarse N/A 5/8 N/A Carbon Steel N/A Zinc Plated N/A 5000 $148.13 Add To Cart
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N/A #10-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 5/8 N/A Carbon Steel N/A Zinc Plated N/A 5000 $153.63 Add To Cart
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N/A #10-24 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Coarse N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 4000 $139.40 Add To Cart
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N/A #10-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #10 N/A Fine N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 4000 $134.10 Add To Cart
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N/A 1/4-20 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A 1/4 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 3000 $135.15 Add To Cart
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N/A 1/4-20 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A 1/4 N/A Coarse N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 3000 $135.45 Add To Cart
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N/A 1/4-20 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A 1/4 N/A Coarse N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 2000 $104.65 Add To Cart
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N/A 1/4-20 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A 1/4 N/A Coarse N/A 1 N/A Carbon Steel N/A Zinc Plated N/A 2000 $128.95 Add To Cart
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N/A 1/4-20 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A 1/4 N/A Coarse N/A 6 N/A Carbon Steel N/A Zinc Plated N/A 2500 $137.81 Add To Cart
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