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Metric-to-Metric Male Hex Thread Adapters

Twist these adapters onto female metric threads to change pitch or switch thread sizes. They can also be used as standoffs to make space between parts. Tighten or loosen with a wrench. These adapters meet ASTM specifications, which means the materials they are made from or plated with adhere to specific standards for chemical and physical properties, such as hardness.

Black oxide steel adapters have a black finish that won’t chip or rub off. They will not rust in dry or indoor environments, but will corrode if used outdoors.

Zinc-plated steel adapters should be used in mostly dry environments. The zinc plating offers temporary rust protection, but once it wears away the steel will rust.

At one third the weight of steel, aluminum adapters are the lightest option. They will not rust in damp or humid environments, but they will corrode if left in water.

18-8 stainless steel adapters can be used in wet environments, but chemicals or salt water will cause staining and rust spots.

For areas exposed to salt water or chemicals, 316 stainless steel adapters are the best choice. Only harsh chemicals, such as hydrochloric acid, will cause them to corrode.

Thread Size

Thread

Lg.

Thread Fit

Hex

(A) Pitch

(A), mm (B) Pitch

(B), mm (A),

mm (B),

mm (A) (B) Size,

mm Lg.,

mm Tensile

Strength, psi Hardness Specifications Met Each

Black-Oxide Steel

M2.5 0.45 M3 0.5 4 4.8 Class 6g Class 6g 4.5 6.35 75,000 Rockwell B65 ASTM A108 93049A101 $7.33

M2.5 0.45 M4 0.7 4 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108 93049A104 7.65

M3 0.5 M3.5 0.6 4.8 6.4 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108 93049A102 7.65

M3 0.5 M4 0.7 4.8 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108 93049A105 7.65

M3 0.5 M5 0.8 4.8 9.5 Class 6g Class 6g 10 6.35 75,000 Rockwell B65 ASTM A108 93049A106 8.41

M3.5 0.6 M4 0.7 6.4 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108 93049A103 7.65

M4 0.7 M5 0.8 9.5 9.5 Class 6g Class 6g 10 6.35 75,000 Rockwell B65 ASTM A108 93049A107 8.41

M4 0.7 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108 93049A108 9.69

M4 0.7 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108 93049A111 9.69

M5 0.8 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108 93049A109 9.69

M5 0.8 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108 93049A112 9.69

M6 1 M8 1.25 12.7 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108 93049A110 9.69

Zinc-Plated Steel

M2.5 0.45 M3 0.5 4 4.8 Class 6g Class 6g 4.5 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A101 7.18

M2.5 0.45 M3.5 0.6 4 6.4 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A102 7.49

M2.5 0.45 M4 0.7 4 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A105 7.49

M3 0.5 M3.5 0.6 4.8 6.4 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A103 7.49

M3 0.5 M4 0.7 4.8 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A106 7.49

M3 0.5 M5 0.8 4.8 9.5 Class 6g Class 6g 10 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A107 8.26

M3.5 0.6 M4 0.7 6.4 9.5 Class 6g Class 6g 6 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A104 7.49

M3.5 0.6 M6 1 6.4 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A109 9.54

M3.5 0.6 M8 1.25 6.4 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A113 9.54

M4 0.7 M5 0.8 9.5 9.5 Class 6g Class 6g 10 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A108 8.26

M4 0.7 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A110 9.54

M4 0.7 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A114 9.54

M5 0.8 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A111 9.54

M5 0.8 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A115 9.54

M6 1 M8 1.25 12.7 12.7 Class 6g Class 6g 13 6.35 75,000 Rockwell B65 ASTM A108, ASTM B633 93048A112 9.54

Aluminum

M2.5 0.45 M3 0.5 4 4.8 Class 6g Class 6g 4.5 6.35 45,000 Rockwell B56 ASTM B211 93046A118 5.78

M2.5 0.45 M3.5 0.6 4 6.4 Class 6g Class 6g 6 6.35 45,000 Rockwell B56 ASTM B211 93046A119 6.01

M2.5 0.45 M4 0.7 4 9.5 Class 6g Class 6g 6 6.35 45,000 Rockwell B56 ASTM B211 93046A122 6.01

M3 0.5 M3.5 0.6 4.8 6.4 Class 6g Class 6g 6 6.35 45,000 Rockwell B56 ASTM B211 93046A120 6.01

M3 0.5 M4 0.7 4.8 9.5 Class 6g Class 6g 6 6.35 45,000 Rockwell B56 ASTM B211 93046A123 6.01

M3 0.5 M5 0.8 4.8 9.5 Class 6g Class 6g 10 6.35 45,000 Rockwell B56 ASTM B211 93046A124 6.45

M3.5 0.6 M4 0.7 6.4 9.5 Class 6g Class 6g 6 6.35 45,000 Rockwell B56 ASTM B211 93046A121 6.01

M4 0.7 M5 0.8 9.5 9.5 Class 6g Class 6g 10 6.35 45,000 Rockwell B56 ASTM B211 93046A125 6.45

M4 0.7 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 45,000 Rockwell B56 ASTM B211 93046A126 7.16

M4 0.7 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 45,000 Rockwell B56 ASTM B211 93046A129 7.16

M5 0.8 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 45,000 Rockwell B56 ASTM B211 93046A127 7.16

M5 0.8 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 45,000 Rockwell B56 ASTM B211 93046A130 7.16

M6 1 M8 1 12.7 12.7 Class 6g Class 6g 12.7 4.8 45,000 Rockwell B56 ASTM B211 93046A101 7.44

M6 1 M8 1.25 12.7 12.7 Class 6g Class 6g 13 6.35 45,000 Rockwell B56 ASTM B211 93046A128 7.16

M8 1 M8 1.25 12.7 12.7 Class 6g Class 6g 12.7 4.8 45,000 Rockwell B56 ASTM B211 93046A103 7.44

M8 1 M10 1.25 12.7 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A102 12.28

M8 1 M10 1.5 12.7 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A108 12.28

M8 1.25 M10 1 12.7 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A104 12.28

M8 1.25 M10 1.5 12.7 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A105 12.28

M10 1 M10 1.25 16 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A106 12.28

M10 1 M10 1.5 16 16 Class 6g Class 6g 17.4 6.4 45,000 Rockwell B56 ASTM B211 93046A109 12.28

M10 1 M12 1.75 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A114 12.80

M10 1.25 M12 1.25 16 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A107 12.80

M10 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A112 12.80

M10 1.25 M12 1.75 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A115 12.80

M10 1.5 M12 1.25 16 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A110 12.80

M10 1.5 M12 1.5 16 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A111 12.80

M10 1.5 M12 1.75 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A116 12.80

M12 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A113 12.80

M12 1.25 M12 1.75 19 19 Class 6g Class 6g 19 9.5 45,000 Rockwell B56 ASTM B211 93046A117 12.80

18-8 Stainless Steel

M2.5 0.45 M3 0.35 7.5 7.5 Class 6g Class 6g 6.4 3.2 85,000 Rockwell B80 ASTM A582 95316A101 5.08

M2.5 0.45 M3 0.5 4 4.8 Class 6g Class 6g 4.5 6.35 85,000 Rockwell B80 ASTM A582 93047A101 5.98

M2.5 0.45 M3.5 0.6 4 6.4 Class 6g Class 6g 6 6.35 85,000 Rockwell B80 ASTM A582 93047A102 6.24

M2.5 0.45 M4 0.7 4 9.5 Class 6g Class 6g 6 6.35 85,000 Rockwell B80 ASTM A582 93047A105 6.24

M3 0.35 M3 0.5 7.5 7.5 Class 6g Class 6g 6.4 3.2 85,000 Rockwell B80 ASTM A582 95316A102 5.08

M3 0.35 M4 0.7 7.5 9.5 Class 6g Class 6g 6.4 3.2 85,000 Rockwell B80 ASTM A582 95316A105 5.08

M3 0.5 M3.5 0.6 4.8 6.4 Class 6g Class 6g 6 6.35 85,000 Rockwell B80 ASTM A582 93047A103 6.24

M3 0.5 M4 0.5 7.5 9.5 Class 6g Class 6g 6.4 3.2 85,000 Rockwell B80 ASTM A582 95316A103 5.08

M3 0.5 M4 0.7 4.8 9.5 Class 6g Class 6g 6 6.35 85,000 Rockwell B80 ASTM A582 93047A106 6.24

M3 0.5 M5 0.8 4.8 9.5 Class 6g Class 6g 10 6.35 85,000 Rockwell B80 ASTM A582 93047A107 6.86

M3.5 0.6 M4 0.7 6.4 9.5 Class 6g Class 6g 6 6.35 85,000 Rockwell B80 ASTM A582 93047A104 6.24

M3.5 0.6 M5 0.5 9.5 7.5 Class 6g Class 6g 7.9 3.2 85,000 Rockwell B80 ASTM A582 95316A104 6.07

M3.5 0.6 M5 0.8 6.4 9.5 Class 6g Class 6g 10 6.35 85,000 Rockwell B80 ASTM A582 93047A108 6.86

M3.5 0.6 M6 1 6.4 12.7 Class 6g Class 6g 13 6.35 85,000 Rockwell B80 ASTM A582 93047A109 8.02

M3.5 0.6 M8 1.25 6.4 12.7 Class 6g Class 6g 13 6.35 85,000 Rockwell B80 ASTM A582 93047A111 8.02

M4 0.5 M4 0.7 9.5 9.5 Class 6g Class 6g 6.4 3.2 85,000 Rockwell B80 ASTM A582 95316A106 5.08

M4 0.5 M5 0.8 9.5 9.5 Class 6g Class 6g 7.9 3.2 85,000 Rockwell B80 ASTM A582 95316A108 6.07

M4 0.7 M5 0.5 9.5 9.5 Class 6g Class 6g 7.9 3.2 85,000 Rockwell B80 ASTM A582 95316A107 6.07

M4 0.7 M5 0.8 9.5 9.5 Class 6g Class 6g 8 3.2 85,000 Rockwell B80 ASTM A582 95316A850 6.35

M4 0.7 M6 1 9.5 12.7 Class 6g Class 6g 13 6.35 85,000 Rockwell B80 ASTM A582 93047A110 8.02

M4 0.7 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 85,000 Rockwell B80 ASTM A582 93047A112 8.02

M5 0.5 M5 0.8 9.5 9.5 Class 6g Class 6g 7.9 3.2 85,000 Rockwell B80 ASTM A582 95316A109 6.07

M5 0.5 M6 1 9.5 12.7 Class 6g Class 6g 9.5 4.8 85,000 Rockwell B80 ASTM A582 95316A112 7.13

M5 0.8 M6 0.75 9.5 12.7 Class 6g Class 6g 9.5 4.8 85,000 Rockwell B80 ASTM A582 95316A110 7.13

M5 0.8 M6 1 9.5 12.7 Class 6g Class 6g 10 4.8 85,000 Rockwell B80 ASTM A582 95316A860 9.82

M5 0.8 M8 1.25 9.5 12.7 Class 6g Class 6g 13 6.35 85,000 Rockwell B80 ASTM A582 93047A113 8.02

M6 0.75 M8 1 12.7 12.7 Class 6g Class 6g 12.7 4.8 85,000 Rockwell B80 ASTM A582 95316A111 8.30

M6 1 M8 1 12.7 12.7 Class 6g Class 6g 12.7 4.8 85,000 Rockwell B80 ASTM A582 95316A113 8.18

M6 1 M8 1.25 12.7 12.7 Class 6g Class 6g 13 4.8 85,000 Rockwell B80 ASTM A582 95316A870 16.58

M8 1 M8 1.25 12.7 12.7 Class 6g Class 6g 13 4.8 85,000 Rockwell B80 ASTM A582 95316A880 16.63

M8 1 M10 1 12.7 16 Class 6g Class 6g 17.4 6.4 85,000 Rockwell B80 ASTM A582 95316A114 13.69

M8 1 M10 1.25 12.7 16 Class 6g Class 6g 17.4 6.4 85,000 Rockwell B80 ASTM A582 95316A115 13.69

M8 1 M10 1.5 12.7 16 Class 6g Class 6g 17.4 6.4 85,000 Rockwell B80 ASTM A582 95316A118 13.69

M8 1.25 M10 1.5 12.7 16 Class 6g Class 6g 17 6.3 85,000 Rockwell B80 ASTM A582 95316A900 14.94

M10 1 M10 1.25 16 16 Class 6g Class 6g 17.4 6.4 85,000 Rockwell B80 ASTM A582 95316A116 13.69

M10 1 M12 1.5 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A121 14.29

M10 1 M12 1.75 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A124 14.29

M10 1.25 M12 1.25 16 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A117 14.29

M10 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A122 14.29

M10 1.25 M12 1.75 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A125 14.29

M10 1.5 M10 1.25 16 16 Class 6g Class 6g 17 6.4 85,000 Rockwell B80 ASTM A582 95316A920 19.99

M10 1.5 M12 1.25 16 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A119 14.29

M10 1.5 M12 1.5 16 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A120 14.29

M10 1.5 M12 1.75 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A126 14.29

M12 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A123 14.29

M12 1.5 M12 1.75 19 19 Class 6g Class 6g 19 9.5 85,000 Rockwell B80 ASTM A582 95316A127 14.29

316 Stainless Steel

M2.5 0.45 M3 0.5 7.5 7.5 Class 6g Class 6g 6.4 3.2 75,000 Rockwell B83 ASTM A276 93045A122 8.00

M3 0.5 M4 0.7 7.5 9.5 Class 6g Class 6g 6.4 3.2 75,000 Rockwell B83 ASTM A276 93045A123 8.00

M4 0.7 M5 0.8 9.5 9.5 Class 6g Class 6g 7.9 3.2 75,000 Rockwell B83 ASTM A276 93045A124 9.52

M5 0.8 M6 1 9.5 12.7 Class 6g Class 6g 9.5 4.8 75,000 Rockwell B83 ASTM A276 93045A125 11.20

M6 0.75 M8 1 12.7 12.7 Class 6g Class 6g 12.7 4.8 75,000 Rockwell B83 ASTM A276 93045A101 13.04

M6 1 M8 1 12.7 12.7 Class 6g Class 6g 12.7 4.8 75,000 Rockwell B83 ASTM A276 93045A102 13.04

M6 1 M8 1.25 12.7 12.7 Class 6g Class 6g 12.7 4.8 75,000 Rockwell B83 ASTM A276 93045A126 13.04

M8 1 M8 1.25 12.7 12.7 Class 6g Class 6g 12.7 4.8 75,000 Rockwell B83 ASTM A276 93045A105 13.04

M8 1 M10 1 12.7 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A103 21.52

M8 1 M10 1.25 12.7 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A104 21.52

M8 1 M10 1.5 12.7 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A110 21.52

M8 1.25 M10 1 12.7 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A106 21.52

M8 1.25 M10 1.5 12.7 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A107 21.52

M10 1 M10 1.25 16 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A108 21.52

M10 1 M10 1.5 16 16 Class 6g Class 6g 17.4 6.4 75,000 Rockwell B83 ASTM A276 93045A111 21.52

M10 1 M12 1.5 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A114 22.44

M10 1 M12 1.75 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A117 22.44

M10 1.25 M12 1.25 16 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A109 22.44

M10 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A115 22.44

M10 1.25 M12 1.75 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A118 22.44

M10 1.5 M12 1.25 16 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A112 22.44

M10 1.5 M12 1.5 16 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A113 22.44

M10 1.5 M12 1.75 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A119 22.44

M12 1.25 M12 1.5 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A116 22.44

M12 1.25 M12 1.75 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A120 22.44

M12 1.5 M12 1.75 19 19 Class 6g Class 6g 19 9.5 75,000 Rockwell B83 ASTM A276 93045A121 22.44