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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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3C25SXPZ/LET N/A #3-48 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #3 N/A Coarse N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 15000 $174.75 Add To Cart
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4C25SXPZ/LET N/A #4-40 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 30000 $286.50 Add To Cart
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4C25SXPZ/LIT N/A #4-40 X 1/4 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 30000 $356.25 Add To Cart
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4C31SXPZ/LET N/A #4-40 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 25000 $270.63 Add To Cart
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4C31SXPZ/LIT N/A #4-40 X 5/16 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 25000 $311.88 Add To Cart
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4C37SXPZ/LET N/A #4-40 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 25000 $278.13 Add To Cart
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4C62SXPZ/LET N/A #4-40 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 5/8 N/A Carbon Steel N/A Zinc Plated N/A 20000 $247.50 Add To Cart
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4C75SXPZ/LET N/A #4-40 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #4 N/A Coarse N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 15000 $198.38 Add To Cart
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6C25SXPZ/LIT N/A #6-32 X 1/4 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 15000 $202.50 Add To Cart
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6C31SXPZ/LET N/A #6-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 15000 $196.13 Add To Cart
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6C31SXPZ/LIT N/A #6-32 X 5/16 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 15000 $234.75 Add To Cart
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6C37SXPZ/LET N/A #6-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 15000 $190.13 Add To Cart
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6C37SXPZ/LIT N/A #6-32 X 3/8 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 15000 $220.13 Add To Cart
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6C50SXPZ/LET N/A #6-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 10000 $145.00 Add To Cart
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6C62SXPZ/LET N/A #6-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 5/8 N/A Carbon Steel N/A Zinc Plated N/A 10000 $157.50 Add To Cart
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6C75SXPZ/LET N/A #6-32 X 3/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 3/4 N/A Carbon Steel N/A Zinc Plated N/A 10000 $168.00 Add To Cart
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6C100SXPZ/LET N/A #6-32 X 1 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 1 N/A Carbon Steel N/A Zinc Plated N/A 8000 $162.20 Add To Cart
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6C125SXPZ/LET N/A #6-32 X 1 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #6 N/A Coarse N/A 1 1/4 N/A Carbon Steel N/A Zinc Plated N/A 8000 $193.40 Add To Cart
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8C25SXPZ/LET N/A #8-32 X 1/4 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 1/4 N/A Carbon Steel N/A Zinc Plated N/A 10000 $151.00 Add To Cart
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8C31SXPZ/LET N/A #8-32 X 5/16 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 5/16 N/A Carbon Steel N/A Zinc Plated N/A 10000 $169.25 Add To Cart
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8C37SXPZ/LET N/A #8-32 X 3/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 10000 $166.75 Add To Cart
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8C37SXPZ/LIT N/A #8-32 X 3/8 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 3/8 N/A Carbon Steel N/A Zinc Plated N/A 10000 $203.75 Add To Cart
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8C50SXPZ/LET N/A #8-32 X 1/2 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 8000 $155.80 Add To Cart
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8C50SXPZ/LIT N/A #8-32 X 1/2 SEM PHILLIPS PAN HEAD W/ INTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 1/2 N/A Carbon Steel N/A Zinc Plated N/A 8000 $173.60 Add To Cart
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8C62SXPZ/LET N/A #8-32 X 5/8 SEM PHILLIPS PAN HEAD W/ EXTERNAL TOOTH LOCKWASHER ZINC PLATED N/A Phillips Pan N/A #8 N/A Coarse N/A 5/8 N/A Carbon Steel N/A Zinc Plated N/A 8000 $175.40 Add To Cart
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