M3 Screws - McMaster-Carr
T-Slotted Framing and Fittings. The most versatile system, attach fittings along the continuous slots to build virtually anything. 1 product. Choose from our selection of M3 screws, including socket head screws, rounded head screws, and more. In stock and ready to ship.
M3 Socket Head Cap Screws - McMaster-Carr
Metric Left-Hand Threaded Flat Head Screws. Tighten these metric screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Choose from our selection of M3 socket head cap screws, including alloy steel socket head screws, 18-8 stainless steel socket head screws, and more. In stock and ready to ship.
What do the numbers in screw sizes M3, M4 etc. mean?
Jan 29, 2021 · You asked about M3, M4, etc - that describes (only) the outside diameter of the screw - or the size of an unthreaded hole the screw would slip through. A full description is like M 6 - 1 X 25 Which describes the outer diameter (6) , the distance from one thread to the next (1) (pitch) and the length (25) (all in millimeters.)
M3 Bolts - McMaster-Carr
T-Slotted Framing and Fittings. The most versatile system, attach fittings along the continuous slots to build virtually anything. 1 product. Choose from our selection of M3 bolts, including hex head screws, socket head screws, and more. In stock and ready to ship.
M3 Set Screws - McMaster-Carr
Metric Super-Corrosion-Resistant 316Stainless Steel Flat-Tip Set Screws. These metric 316 stainless steel set screws have excellent chemical resistance and can be used in saltwater environments. The tip makes good contact on flat surfaces and allows you to make frequent adjustments with minimal surface damage.
Metric Screws - McMaster-Carr
Transfer Punches. Mark the center of an existing hole onto a separate workpiece. 14 products. Choose from our selection of metric screws, including socket head screws, rounded head screws, and more. In stock and ready to ship.
Metric Fine Pitch Screws - McMaster-Carr
Weld Nuts. Weld to metal surfaces to add permanent threads. Choose from our selection of metric fine pitch screws, including socket head screws, rounded head screws, and more. In stock and ready to ship.
Grub Screws - McMaster-Carr
Metric Super-Corrosion-Resistant 316Stainless Steel Flat-Tip Set Screws. These metric 316 stainless steel set screws have excellent chemical resistance and can be used in saltwater environments. The tip makes good contact on flat surfaces and allows you to make frequent adjustments with minimal surface damage.
DIN 7985 Machine Screws - McMaster-Carr
Phillips Rounded Head Screw Assortments. These assortments include pan head screws. Choose from our selection of DIN 7985 machine screws, including rounded head screws, flat head screws, and more. In stock and ready to ship.
Screw Size Charts - McMaster-Carr
Choose from our selection of screw size identifiers, screw, bolt, and nut size identifiers, reference ...