6-40 Screws | McMaster-Carr

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Thread Size

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Fastener Head Type

Material

Stainless Steel

Drive Style

Spring Plunger Driver

Threading

Partially Threaded

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Socket Head Profile

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Head Height

Rounded Head Style

Specifications Met

Federal Specification

Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

Thread Direction

Flat Head Profile

Countersink Angle

RoHS

Compliant with Exemptions

Tip Type

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

DFARS Specialty Metals

Export Control Classification Number (ECCN)

REACH

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132 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

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Spring Plungers

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Measuring and Inspecting

Transfer Punches

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

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