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Machine screws are cylindrical fasteners used to join two items, commonly made of steel or stainless steel, and available in multiple sizes and finishes. SEMS screws, a subtype of machine screws, feature a washer-like, serrated head to maintain grip and prevent loosening. Weld-on screws, designed for welding onto surfaces, are marked by a threaded shank with a weld-nut on the end, available in a range of sizes and finishes, and typically constructed from steel or stainless steel.
STANLEYENGINEEREDFAST-STAINLESSSTEELTORXPLUSMACHINESCREWS-100x100
Unit of Measure
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Item #

Item Name

Brand

Measurement

Thread Size

Material

Finish

Length

Head

Drive

BBI Size

Size

Point

580767 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 2 1/4 N/A Flat N/A Slotted N/A 5/16"-18x2 1/4",(FT) FLAT HEAD SLOT N/A 5/16"-18x2 1/4",(Fully Threaded) FLAT HEAD SLOT N/A
580771 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 2 1/2 N/A Flat N/A Slotted N/A 5/16"-18x2 1/2",(FT) FLAT HEAD SLOT N/A 5/16"-18x2 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
580773 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 2 3/4 N/A Flat N/A Slotted N/A 5/16"-18x2 3/4",(FT) FLAT HEAD SLOT N/A 5/16"-18x2 3/4",(Fully Threaded) FLAT HEAD SLOT N/A
580779 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 3 N/A Flat N/A Slotted N/A 5/16"-18x3",(FT) FLAT HEAD SLOT N/A 5/16"-18x3",(Fully Threaded) FLAT HEAD SLOT N/A
580783 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 3 1/2 N/A Flat N/A Slotted N/A 5/16"-18x3 1/2",(FT) FLAT HEAD SLOT N/A 5/16"-18x3 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
580787 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 4 N/A Flat N/A Slotted N/A 5/16"-18x4",(FT) FLAT HEAD SLOT N/A 5/16"-18x4",(Fully Threaded) FLAT HEAD SLOT N/A
580791 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 5 N/A Flat N/A Slotted N/A 5/16"-18x5",(FT) FLAT HEAD SLOT N/A 5/16"-18x5",(Fully Threaded) FLAT HEAD SLOT N/A
580795 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 5/16-18 N/A Steel N/A Zinc N/A 6 N/A Flat N/A Slotted N/A 5/16"-18x6",(FT) FLAT HEAD SLOT N/A 5/16"-18x6",(Fully Threaded) FLAT HEAD SLOT N/A
580821 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 1/2 N/A Flat N/A Slotted N/A 3/8"-16x1/2",(FT) UNDERCUT FLAT HEAD SLOT N/A 3/8"-16x1/2",(Fully Threaded) UNDERCUT FLAT HEAD SLOT N/A
580823 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 3/4 N/A Flat N/A Slotted N/A 3/8"-16x3/4",(FT) FLAT HEAD SLOT N/A 3/8"-16x3/4",(Fully Threaded) FLAT HEAD SLOT N/A
580831 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 1 N/A Flat N/A Slotted N/A 3/8"-16x1",(FT) FLAT HEAD SLOT N/A 3/8"-16x1",(Fully Threaded) FLAT HEAD SLOT N/A
580837 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 1 1/4 N/A Flat N/A Slotted N/A 3/8"-16x1 1/4",(FT) FLAT HEAD SLOT N/A 3/8"-16x1 1/4",(Fully Threaded) FLAT HEAD SLOT N/A
580847 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 1 1/2 N/A Flat N/A Slotted N/A 3/8"-16x1 1/2",(FT) FLAT HEAD SLOT N/A 3/8"-16x1 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
580855 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 1 3/4 N/A Flat N/A Slotted N/A 3/8"-16x1 3/4",(FT) FLAT HEAD SLOT N/A 3/8"-16x1 3/4",(Fully Threaded) FLAT HEAD SLOT N/A
580863 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 2 N/A Flat N/A Slotted N/A 3/8"-16x2",(FT) FLAT HEAD SLOT N/A 3/8"-16x2",(Fully Threaded) FLAT HEAD SLOT N/A
580867 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 2 1/4 N/A Flat N/A Slotted N/A 3/8"-16x2 1/4",(FT) FLAT HEAD SLOT N/A 3/8"-16x2 1/4",(Fully Threaded) FLAT HEAD SLOT N/A
580871 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 2 1/2 N/A Flat N/A Slotted N/A 3/8"-16x2 1/2",(FT) FLAT HEAD SLOT N/A 3/8"-16x2 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
580879 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 3 N/A Flat N/A Slotted N/A 3/8"-16x3",(FT) FLAT HEAD SLOT N/A 3/8"-16x3",(Fully Threaded) FLAT HEAD SLOT N/A
580883 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 3 1/2 N/A Flat N/A Slotted N/A 3/8"-16x3 1/2",(FT) FLAT HEAD SLOT N/A 3/8"-16x3 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
580887 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 4 N/A Flat N/A Slotted N/A 3/8"-16x4",(FT) FLAT HEAD SLOT N/A 3/8"-16x4",(Fully Threaded) FLAT HEAD SLOT N/A
580891 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 5 N/A Flat N/A Slotted N/A 3/8"-16x5",(FT) FLAT HEAD SLOT N/A 3/8"-16x5",(Fully Threaded) FLAT HEAD SLOT N/A
580895 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 3/8-16 N/A Steel N/A Zinc N/A 6 N/A Flat N/A Slotted N/A 3/8"-16x6",(FT) FLAT HEAD SLOT N/A 3/8"-16x6",(Fully Threaded) FLAT HEAD SLOT N/A
580931 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 1/2-13 N/A Steel N/A Zinc N/A 1 N/A Flat N/A Slotted N/A 1/2"-13x1",(FT) FLAT HEAD SLOT N/A 1/2"-13x1",(Fully Threaded) FLAT HEAD SLOT N/A
580937 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 1/2-13 N/A Steel N/A Zinc N/A 1 1/4 N/A Flat N/A Slotted N/A 1/2"-13x1 1/4",(FT) FLAT HEAD SLOT N/A 1/2"-13x1 1/4",(Fully Threaded) FLAT HEAD SLOT N/A
580947 N/A Screws - Machine Screws, Sems , Weld and More N/A ABE Fasteners or Other N/A Unified N/A 1/2-13 N/A Steel N/A Zinc N/A 1 1/2 N/A Flat N/A Slotted N/A 1/2"-13x1 1/2",(FT) FLAT HEAD SLOT N/A 1/2"-13x1 1/2",(Fully Threaded) FLAT HEAD SLOT N/A
Unit of Measure
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