M4 Adapters | McMaster-Carr

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Unified Standard Class 2A

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40,000 psi to 49,999 psi

50,000 psi to 59,999 psi

60,000 psi to 99,999 psi

100,000 psi or greater

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DFARS Specialty Metals

Hardness

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Specifications Met

415 Products

Thread Adapters

Male-Female Thread Adapters

Metric-to-Metric Male-Female Hex Thread Adapters

Increase or decrease metric thread size and change the pitch

57 products

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric

59 products

Slotted-Drive Male-Female Round Thread Adapters

Install and remove with a screwdriver

3 products

Male Thread Adapters

Metric-to-Metric Male Round Thread Adapters

Finger tighten two female-threaded parts with dissimilar metric thread sizes

1 product

Metric-to-Metric Male Hex Thread Adapters

Join two female-threaded parts with dissimilar metric thread sizes

31 products

Inch-to-Metric Male Hex Thread Adapters

Join inch and metric female-threaded parts

31 products

Inch-to-Metric Male Round Thread Adapters

Finger tighten two female-threaded parts with inch and metric thread sizes

2 products

Female Thread Adapters

Metric-to-Metric Female Hex Thread Adapters

Join two male-threaded parts with dissimilar metric thread sizes

35 products

Inch-to-Metric Female Hex Thread Adapters

Join two male-threaded parts with inch and metric thread sizes

32 products

Left-Hand to Right-Hand Female Hex Thread Adapters

Join two male-threaded parts with dissimilar metric thread sizes
Fasten parts with right-hand threads to parts with left-hand threads

1 product

Other Products

Threaded Inserts

Create new threads or repair stripped threads

24 products

Standoffs

Separate, position, or connect components in assemblies

99 products

Weld Nuts

Weld to metal surfaces to add permanent threads

15 products

Brakes

Control how much and how quickly your drive system slows down

2 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

12 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

2 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

5 products

DIN Rail Mounting Adapters

Attach to components not made for DIN rail and clip on to install

3 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

1 product