Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

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 strong and corrosion resistant.

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

18-8 stainless steel adapters have good corrosion resistance.

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.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Inch

Thread Size

Thread Lg.

Thread Fit

Hex

Each

(A) (B) (A) (B) (A) (B) Size Lg. Hardness 1-9 10-Up

Black-Oxide Steel

10-24 10-24 3/8" 3/8" Class 2B Class 2B 3/8" 1 1/2" Rockwell B80 91998A105 $11.62 $10.04

1/4"-20 1/4"-20 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 91998A108 14.46 12.51

1/4"-28 1/4"-28 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 91998A109 14.46 12.51

5/16"-18 5/16"-18 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 91998A110 16.06 13.89

5/16"-24 5/16"-24 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 91998A111 16.06 13.89

3/8"-16 3/8"-16 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 91998A112 17.69 15.30

3/8"-24 3/8"-24 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 91998A113 17.69 15.30

1/2"-13 1/2"-13 1" 1" Class 2B Class 2B 5/8" 3" Rockwell B80 91998A115 23.76 20.55

3/4"-10 3/4"-10 1 1/2" 1 1/2" Class 2B Class 2B 1 1/4" 5" Rockwell B80 91998A117 53.33 46.13

7/8"-9 7/8"-9 1 1/2" 1 1/2" Class 2B Class 2B 1 3/8" 5" Rockwell B80 91998A118 55.34 47.10

1"-8 1"-8 1 1/2" 1 1/2" Class 2B Class 2B 1 5/8" 5" Rockwell B80 91998A119 66.66 56.73

Zinc-Plated Steel

3/8"-16 3/8"-16 1 3/4" 1 3/4" Class 2B Class 2B 3/4" 4" Rockwell B65 94280A115 14.72 12.47

1/2"-13 1/2"-13 1 3/4" 1 3/4" Class 2B Class 2B 7/8" 4" Rockwell B65 94280A119 9.35 7.91

5/8"-11 5/8"-11 2 1/4" 2 1/4" Class 2B Class 2B 1 1/8" 5" Rockwell B65 94280A123 28.90 24.46

3/4"-10 3/4"-10 2 1/4" 2 1/4" Class 2B Class 2B 1 1/4" 5" Rockwell B65 94280A127 34.05 28.83

7/8"-9 7/8"-9 3 1/4" 3 1/4" Class 2B Class 2B 1 3/8" 7" Rockwell B65 94280A131 36.88 31.34

1"-8 1"-8 3 1/4" 3 1/4" Class 2B Class 2B 1 5/8" 7" Rockwell B65 94280A135 37.25 31.67

1 1/8"-7 1 1/8"-7 3 1/2" 3 1/2" Class 2B Class 2B 1 3/4" 7 1/2" Rockwell B65 94280A101 46.51 39.58

1 1/4"-7 1 1/4"-7 3 1/2" 3 1/2" Class 2B Class 2B 2" 7 1/2" Rockwell B65 94280A102 56.00 47.66

1 1/2"-6 1 1/2"-6 3 3/4" 3 3/4" Class 2B Class 2B 2 3/8" 8" Rockwell B65 94280A104 90.35 76.89

Aluminum

5-40 5-40 1/4" 1/4" Class 2B Class 2B 5/16" 1" Rockwell B56 96864A102 11.44 9.89

6-32 6-32 1/4" 1/4" Class 2B Class 2B 5/16" 1" Rockwell B56 96864A103 11.44 9.89

8-32 8-32 5/16" 5/16" Class 2B Class 2B 3/8" 1" Rockwell B56 96864A104 13.08 11.32

10-32 10-32 3/8" 3/8" Class 2B Class 2B 3/8" 1 1/2" Rockwell B56 96864A106 13.08 11.32

1/4"-20 1/4"-20 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B56 96864A108 15.65 13.54

1/4"-28 1/4"-28 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B56 96864A109 15.65 13.54

5/16"-24 5/16"-24 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B56 96864A112 18.42 15.93

3/8"-16 3/8"-16 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B56 96864A113 17.79 15.38

3/8"-24 3/8"-24 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B56 96864A114 17.79 15.38

18-8 Stainless Steel

4-40 4-40 1/4" 1/4" Class 2B Class 2B 5/16" 1" Rockwell B80 97372A101 5.71 4.93

6-32 6-32 1/4" 1/4" Class 2B Class 2B 5/16" 1" Rockwell B80 97372A102 5.71 4.93

8-32 8-32 5/16" 5/16" Class 2B Class 2B 3/8" 1" Rockwell B80 97372A103 5.71 4.93

10-32 10-32 3/8" 3/8" Class 2B Class 2B 3/8" 1 1/2" Rockwell B80 97372A105 7.76 6.70

10-24 10-24 3/8" 3/8" Class 2B Class 2B 3/8" 1 1/2" Rockwell B80 97372A104 6.46 5.59

12-24 12-24 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 97372A112 11.70 10.12

1/4"-20 1/4"-20 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 97372A106 8.36 7.23

1/4"-28 1/4"-28 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 97372A113 11.70 10.12

5/16"-18 5/16"-18 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 97372A107 9.16 7.91

5/16"-24 5/16"-24 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 97372A114 13.41 11.60

3/8"-16 3/8"-16 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 97372A108 13.66 11.82

3/8"-24 3/8"-24 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 97372A115 15.26 13.20

1/2"-13 1/2"-13 1" 1" Class 2B Class 2B 5/8" 3" Rockwell B80 97372A109 18.31 15.82

5/8"-11 5/8"-11 1 1/2" 1 1/2" Class 2B Class 2B 1 1/8" 5" Rockwell B80 97372A117 44.70 38.66

3/4"-10 3/4"-10 1 1/2" 1 1/2" Class 2B Class 2B 1 1/4" 5" Rockwell B80 97372A118 52.79 45.65

1"-8 1"-8 1 1/2" 1 1/2" Class 2B Class 2B 1 5/8" 5" Rockwell B80 97372A121 72.40 61.61

316 Stainless Steel

10-32 10-32 3/8" 3/8" Class 2B Class 2B 3/8" 1 1/2" Rockwell B80 95537A106 12.09 10.46

12-24 12-24 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 95537A107 15.54 13.45

1/4"-20 1/4"-20 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 95537A108 15.54 13.45

1/4"-28 1/4"-28 1/2" 1/2" Class 2B Class 2B 3/8" 2" Rockwell B80 95537A109 15.54 13.45

5/16"-18 5/16"-18 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 95537A111 17.99 15.56

5/16"-24 5/16"-24 1/2" 1/2" Class 2B Class 2B 7/16" 2" Rockwell B80 95537A112 17.99 15.56

3/8"-16 3/8"-16 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 95537A113 20.10 17.39

3/8"-24 3/8"-24 3/4" 3/4" Class 2B Class 2B 1/2" 2 1/2" Rockwell B80 95537A114 20.10 17.39

1/2"-13 1/2"-13 1" 1" Class 2B Class 2B 5/8" 3" Rockwell B80 95537A116 28.38 24.55

5/8"-11 5/8"-11 1 1/2" 1 1/2" Class 2B Class 2B 1 1/8" 5" Rockwell B80 95537A117 57.73 49.93

3/4"-10 3/4"-10 1 1/2" 1 1/2" Class 2B Class 2B 1 1/4" 5" Rockwell B80 95537A118 81.35 70.36

Metric

Thread

Size

Pitch,

mm

Thread

Lg.,

mm

Thread Fit

Hex,

mm

Each

(A) (B) (A) (B) (A) (B) (A) (B) Size Lg. Hardness 1-9 10-Up

Black-Oxide Steel

M6 M6 1 1 8 8 Class 6H Class 6H 10 50 Rockwell B80 91998A122 $16.93 $14.65

M8 M8 1.25 1.25 12 12 Class 6H Class 6H 11 50 Rockwell B80 91998A123 18.93 16.38

M10 M10 1.5 1.5 20 20 Class 6H Class 6H 16 65 Rockwell B80 91998A124 21.78 18.84

M12 M12 1.75 1.75 25 25 Class 6H Class 6H 16 75 Rockwell B80 91998A125 23.18 20.05

18-8 Stainless Steel

M4 M4 0.7 0.7 8 8 Class 6H Class 6H 10 25 Rockwell B80 97372A122 8.81 7.62

M5 M5 0.8 0.8 8 8 Class 6H Class 6H 10 38 Rockwell B80 97372A123 9.09 7.86

M6 M6 1 1 8 8 Class 6H Class 6H 10 50 Rockwell B80 97372A124 11.69 10.11

M8 M8 1.25 1.25 12 12 Class 6H Class 6H 11 50 Rockwell B80 97372A125 12.19 10.54

M10 M10 1.5 1.5 20 20 Class 6H Class 6H 16 65 Rockwell B80 97372A126 17.19 14.86

M12 M12 1.75 1.75 25 25 Class 6H Class 6H 16 75 Rockwell B80 97372A127 21.50 18.59