1 1/4"-12 Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Fastener Strength Grade/Class

Threading

Thread Type

Thread Direction

Thread Spacing

Finish

Zinc Yellow-Chromate Plated

Fastener Head Type

Nut Type

Hex Nut Profile

Threaded Insert Type

Thread Fit

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Width

Height

For Tap Thread Size

Fastener Strength Rating

Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

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

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

Performance

168 Products

Fastening and Joining

Hex Head Screws

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

21 products

Socket Head Screws

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

14 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

4 products

Hex Nuts

Handle most general fastening needs

31 products

Coupling Nuts

Connect and extend threaded rods

2 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

14 products

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

2 products

Threaded Inserts

Create new threads or repair stripped threads

38 products

Weld Nuts

Weld to metal surfaces to add permanent threads

4 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

24 products

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

10 products

Power Transmission

Hydraulic Cylinder Mounts

Restrain cylinders and secure loads to the end of the rod

1 product

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

2 products

Fluid Handling

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

1 product

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

2 products

Material Handling

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

4 products