Inch-to-Inch Male Hex Thread Adapters

Need to join two female-threaded parts, such as coupling nuts, with dissimilar inch thread sizes? Attach them to these adapters and tighten the exterior hex nut for a secure connection. You can also use these adapters to change the gender of a mating part from female to male, increase or decrease the thread size, or convert the threads from fine to coarse (and vice versa). The smaller adapters act as threaded standoffs, positioning and separating circuit boards and other components in assemblies. All of these adapters meet ASTM specifications, which means they’re made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.

Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.

18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.

316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.

At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.

Thread Size

Thread

Lg.

Thread Fit

Hex

(A) (B) (A) (B) (A) (B) Size Lg. Specifications Met Tensile

Strength, psi Hardness Each

Black-Oxide Steel

4-40 6-32 3/16" 1/4" Class 2A Class 2A 3/16" 1/4" ASTM A108 78,000 Rockwell B85 91349A240 $7.33

8-32 4-40 3/8" 3/16" Class 2A Class 2A 1/4" 1/4" ASTM A108 78,000 Rockwell B85 91349A250 7.65

10-24 1/4"-20 3/8" 3/8" Class 2A Class 2A 3/8" 3/16" ASTM A108 78,000 Rockwell B85 91349A110 6.30

10-24 3/8"-16 3/8" 3/8" Class 2A Class 2A 9/16" 1/4" ASTM A108 78,000 Rockwell B85 91349A120 9.63

10-32 4-40 3/8" 3/16" Class 2A Class 2A 3/8" 1/4" ASTM A108 78,000 Rockwell B85 91349A260 8.41

10-32 6-32 3/8" 1/4" Class 2A Class 2A 3/8" 1/4" ASTM A108 78,000 Rockwell B85 91349A270 8.41

10-32 8-32 3/8" 3/8" Class 2A Class 2A 3/8" 1/4" ASTM A108 78,000 Rockwell B85 91349A280 8.41

10-32 1/4"-20 3/8" 1/2" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A290 8.41

1/4"-20 4-40 1/2" 3/16" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A310 8.41

1/4"-20 6-32 1/2" 1/4" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A320 8.41

1/4"-20 8-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A330 8.41

1/4"-20 3/8"-16 5/8" 5/8" Class 2A Class 2A 9/16" 1/4" ASTM A108 78,000 Rockwell B85 91349A130 9.45

1/4"-20 1/2"-13 5/8" 3/4" Class 2A Class 2A 3/4" 3/8" ASTM A108 78,000 Rockwell B85 91349A140 12.97

5/16"-18 6-32 1/2" 1/4" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A340 9.69

5/16"-18 8-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A350 9.69

5/16"-18 10-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A360 9.69

5/16"-18 1/4"-20 1/2" 1/2" Class 2A Class 2A 1/2" 1/4" ASTM A108 78,000 Rockwell B85 91349A370 9.69

5/16"-18 3/8"-16 5/8" 5/8" Class 2A Class 2A 9/16" 1/4" ASTM A108 78,000 Rockwell B85 91349A150 9.63

5/16"-18 5/8"-11 5/8" 3/4" Class 2A Class 2A 15/16" 9/16" ASTM A108 78,000 Rockwell B85 91349A160 14.15

3/8"-16 1/2"-13 5/8" 3/4" Class 2A Class 2A 3/4" 3/8" ASTM A108 78,000 Rockwell B85 91349A170 12.09

3/8"-16 5/8"-11 5/8" 3/4" Class 2A Class 2A 15/16" 9/16" ASTM A108 78,000 Rockwell B85 91349A180 15.09

3/8"-16 3/4"-10 5/8" 3/4" Class 2A Class 2A 1 1/8" 11/16" ASTM A108 78,000 Rockwell B85 91349A190 17.49

1/2"-13 1/2"-20 3/4" 3/4" Class 2A Class 2A 3/4" 3/8" ASTM A108 78,000 Rockwell B85 91349A210 12.97

1/2"-13 5/8"-11 3/4" 3/4" Class 2A Class 2A 15/16" 9/16" ASTM A108 78,000 Rockwell B85 91349A220 15.09

1/2"-13 3/4"-10 3/4" 3/4" Class 2A Class 2A 1 1/8" 11/16" ASTM A108 78,000 Rockwell B85 91349A230 17.49

Zinc-Plated Steel

2-56 4-40 5/32" 3/16" Class 2A Class 2A 3/16" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A110 7.18

2-56 6-32 5/32" 1/4" Class 2A Class 2A 3/16" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A120 7.18

4-40 6-32 3/16" 1/4" Class 2A Class 2A 3/16" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A130 7.18

8-32 2-56 3/8" 5/32" Class 2A Class 2A 1/4" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A140 7.49

8-32 4-40 3/8" 3/16" Class 2A Class 2A 1/4" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A150 7.49

8-32 6-32 3/8" 1/4" Class 2A Class 2A 1/4" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A160 7.49

10-32 4-40 3/8" 3/16" Class 2A Class 2A 3/8" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A170 8.26

10-32 6-32 3/8" 1/4" Class 2A Class 2A 3/8" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A180 8.26

10-32 8-32 3/8" 3/8" Class 2A Class 2A 3/8" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A190 8.26

10-32 1/4"-20 3/8" 1/2" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A210 8.26

1/4"-20 4-40 1/2" 3/16" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A220 8.26

1/4"-20 6-32 1/2" 1/4" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A230 8.26

1/4"-20 8-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A240 8.26

5/16"-18 6-32 1/2" 1/4" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A250 9.54

5/16"-18 8-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A260 9.54

5/16"-18 10-32 1/2" 3/8" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A270 9.54

5/16"-18 1/4"-20 1/2" 1/2" Class 2A Class 2A 1/2" 1/4" ASTM A108, ASTM B633 78,000 Rockwell B85 91353A280 9.54

18-8 Stainless Steel

2-56 4-40 5/32" 3/16" Class 2A Class 2A 3/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A050 5.00

2-56 4-48 5/32" 3/16" Class 2A Class 2A 3/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A379 4.59

2-56 6-32 5/32" 1/4" Class 2A Class 2A 3/16" 1/4" ASTM A582 85,000 Rockwell B80 91351A110 5.98

4-40 4-48 3/16" 3/16" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A382 4.84

4-40 6-32 3/16" 1/4" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A150 5.16

4-40 6-40 3/16" 1/4" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A383 5.08

4-40 10-24 3/16" 1/4" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A913 7.13

4-48 6-32 3/16" 1/4" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A401 5.08

4-48 6-40 3/16" 1/4" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A408 5.08

6-32 4-40 1/4" 3/16" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A411 5.08

6-32 6-40 1/4" 1/4" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A414 5.54

6-32 8-32 1/4" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A250 5.36

6-32 8-36 1/4" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A415 5.56

6-32 10-24 1/4" 3/8" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A915 7.13

6-40 8-32 1/4" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A416 5.56

6-40 8-36 1/4" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A426 5.56

8-32 2-56 3/8" 5/32" Class 2A Class 2A 1/4" 1/4" ASTM A582 85,000 Rockwell B80 91351A120 6.24

8-32 4-40 3/8" 3/16" Class 2A Class 2A 1/4" 1/4" ASTM A582 85,000 Rockwell B80 91351A130 6.24

8-32 8-36 3/8" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A429 6.03

8-32 10-24 3/8" 3/8" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A437 6.07

8-32 10-32 3/8" 3/8" Class 2A Class 2A 1/4" 1/8" ASTM A582 85,000 Rockwell B80 95316A320 5.63

8-36 10-24 3/8" 3/8" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A453 6.07

8-36 10-32 3/8" 3/8" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A482 6.07

10-24 10-32 3/8" 3/8" Class 2A Class 2A 5/16" 1/8" ASTM A582 85,000 Rockwell B80 95316A330 6.82

10-24 1/4"-20 3/8" 5/8" Class 2A Class 2A 3/8" 3/16" ASTM A582 85,000 Rockwell B80 95316A484 7.13

10-24 1/4"-28 3/8" 5/8" Class 2A Class 2A 3/8" 3/16" ASTM A582 85,000 Rockwell B80 95316A492 7.13

10-24 1/4"-32 3/8" 5/8" Class 2A Class 2A 3/8" 3/16" ASTM A582 85,000 Rockwell B80 95316A499 7.13

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 Inch-to-Metric Female Hex Thread AdaptersInch-to-Inch Male Round Thread Adapters 

Inch-to-Inch Male Hex Thread Adapters