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Small pack of 25 black oxide steel M8 socket set screws 40mm long

Zoro Select

Zoro Select M07840.080.0040 Socket Set Screw M8x1.25 40mm PK25

SKU CH-CBZD-X8ZV6

A pack of 25 M8 x 1.25 mm cup-point socket set screws, 40 mm long with 4 mm hex drive and black-oxide steel finish

  • ColorTransparent
  • Black oxide finish resists corrosion
  • Cup point grips securely in threaded holes
  • 4 mm socket drive installs quickly with hex key
  • M8 × 1.25 metric threads fit standard hardware
  • Pack of 25 covers multiple assembly tasks

Zoro Select Socket Set Screw M8x1.25

This pack contains 25 headless socket set screws with a cup point. Each screw has an M8 thread with a 1.25 mm pitch and an overall length of 40 mm. They are made from steel with a black oxide finish for corrosion resistance.

Ideal for metric machine assembly and maintenance

Suited for technicians who need a secure, flush locking point in tapped holes. Not suitable for applications requiring a larger thread diameter or a different point style such as cone or flat. Buyers needing a longer reach or a different drive size should look at alternative fasteners.

Straightforward installation with a 4 mm hex key

The socket drive accepts a standard 4 mm Allen wrench for quick tightening. Ensure the tapped hole matches the M8x1.25 specification to avoid thread damage. The cup point can mar softer materials, so verify workpiece hardness before final torque.

Highlights

  • Black oxide finish resists corrosion
  • Cup point grips securely in threaded holes
  • 4 mm socket drive installs quickly with hex key
  • M8 × 1.25 metric threads fit standard hardware
  • Pack of 25 covers multiple assembly tasks

Specifications

ColorTransparent
BrandZORO SELECT

Questions about this item

What drive bit do I need to install these M8x1.25 set screws?

A 4 mm hex socket bit fits the internal drive on each screw.

Will these cup-point screws hold securely in an existing M8x1.25 threaded hole?

Yes, the M8x1.25 thread matches the hole and the cup point digs in for a firm lock.

How can I confirm the length after the screws are seated?

Each screw measures 40 mm overall; a ruler or caliper will verify the installed length.

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