Left-Hand Threaded Hex Head Screws | McMaster-Carr

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System of Measurement

Thread Size

Thread Direction

Length

Fastener Head Type

Threading

Partially Threaded

Threaded on Both Ends

Material

18-8 Stainless Steel

Thread Pitch

Fastener Strength Grade/Class

Drive Style

Head Height

Thread Type

Socket Head Profile

Drive Size

Thread Fit

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Unified Standard Class 2A

Unified Standard Class 3A

Specifications Met

Head Width

Finish

Zinc Yellow-Chromate Plated

Thread Spacing

Tensile Strength

Less than 100,000 psi

110,000 psi to 119,999 psi

130,000 psi or greater

Head Diameter

Hardness

RoHS

DFARS Specialty Metals

Export Control Classification Number (ECCN)

REACH

How can we improve?

294 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

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 that won't snag on surrounding parts

Shoulder Screws

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

Fabricating and Machining

Lathe Tool Insert Holder Replacement Parts

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

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