Left Hand Screws | McMaster-Carr

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System of Measurement

Thread Size

Thread Direction

Right Hand and Left Hand

Length

Threading

Threaded on Both Ends

Fastener Head Type

Thread Pitch

Material

Socket Head Profile

Finish

Zinc Yellow-Chromate Plated

Drive Size

Drive Style

Fastener Strength Grade/Class

Thread Type

Head Height

Thread Fit

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Specifications Met

Head Diameter

Thread Spacing

Coarse

Fine

Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

EAR99

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