Counterbore Screws | McMaster-Carr

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System of Measurement

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Material

Carbide-Tipped Steel

Grade 2 Titanium

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Threading

Partially Threaded

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External 12-Point

Hex with Pilot Recess

Finish

Titanium Nitride (TiN) Coated

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Specifications Met

Fed. Spec. FF-S-86

Thread Spacing

Tensile Strength

Less than 20,000 psi

20,000 psi to 99,999 psi

100,000 psi to 119,999 psi

120,000 psi to 149,999 psi

150,000 psi or greater

Fastener Strength Grade/Class

Screw Size

Thread Fit

Metric Class 4g6g

Metric Class 4h

Metric Class 5g6g

Metric Class 6g

Unified Standard Class 2A

Unified Standard Class 3A

DFARS Specialty Metals

Hardness

RoHS

Compliant with Exemptions

REACH

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How can we improve?

8,516 Products

Fastening and Joining

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

12-Point Screws

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

Fabricating and Machining

Counterbores

Enlarge the top of a hole to install socket and hex head screws flush with the surface

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)