Zoro Select
Zoro Select Carriage Bolt M12-1.75x50mm Class 4.6 Zinc PK50
M12-1.75 carriage bolt with square neck, Class 4.6 steel, zinc-plated, 50 mm length, pack of 50
- TypeScrews & Bolts
- Secure grip from square neck prevents rotation
- Class 4.6 steel delivers 58,000 psi tensile strength
- Zinc plating resists corrosion in outdoor use
- M12-1.75 coarse thread fits standard metric nuts
- Pack of 50 covers multiple fastening jobs
Zoro Select Carriage Bolt M12-1.75x50mm
Zoro Select carriage bolts are Class 4.6 steel fasteners with a zinc-plated finish. The metric coarse thread measures M12-1.75 and the shank length is 50 mm. A square neck under the round head locks into timber or metal to prevent rotation during tightening. Supplied in a pack of 50 pieces.
Check thread pitch and hole clearance before
Verify that the mating material accepts a metric coarse pitch of 1.75 mm and that the square neck width of 12.70 mm fits the prepared slot. The head diameter ranges from 29.35 to 30.65 mm, so confirm countersink or washer dimensions suit this spread. Ensure the 50 mm length provides sufficient engagement for your joint thickness.
Class 4.6 steel yields predictable clamping force
Tensile strength is rated at 58,000 psi, giving a consistent preload when torqued to specification. The zinc plating resists surface corrosion during extended outdoor or structural exposure. Under sustained load the square neck maintains alignment without relying on friction alone. DIN 603 geometry ensures dimensional repeatability across the full pack.
Highlights
- Secure grip from square neck prevents rotation
- Class 4.6 steel delivers 58,000 psi tensile strength
- Zinc plating resists corrosion in outdoor use
- M12-1.75 coarse thread fits standard metric nuts
- Pack of 50 covers multiple fastening jobs
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Screws & Bolts |
Questions about this item
What comes in the package and do I need to buy nuts or washers separately?
The package contains 50 carriage bolts only; matching M12 nuts and washers must be purchased separately.
Should I choose the Class 4.6 zinc-plated version or a higher grade for my application?
Class 4.6 provides a tensile strength of 58,000 psi and is suitable for general-purpose fastening; select a higher class only if the design calls for greater strength.
What does the M12-1.75 x 50 mm size mean when the bolt is installed in a machine?
It indicates a 12 mm diameter with 1.75 mm coarse pitch and a 50 mm shank length under the 29.35–30.65 mm round head, requiring a square neck hole of 12.70 mm width and 8.75 mm height to prevent rotation.
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