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System of Measurement
Width
Tolerance Rating
Minimum Hardness
Hardness
Specifications Met
DFARS Specialty Metals
Export Control Classification Number (ECCN)
Thread Size
Shape
For Keyway Diameter
Finish
Mounting Screw Size
Screw Size
Mount Type
Head Length
For Machine Table T-Slot Width
Rounded Machine Keys
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Tolerance | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Specs. Met | Pkg. Qty. | Pkg. | |||
1008-1045 Carbon Steel | ||||||||||
1/2" × 1/2" | ||||||||||
| 1" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A605 | 00000 | ||
| 1" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 5 | 98870A629 | 00000 | ||
| 1 1/2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | Not Rated | ASME B17.1 Class 2 | 1 | 98870A959 | 0000 | ||
| 1 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 5 | 98870A522 | 00000 | ||
| 1 5/8" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | Not Rated | ASME B17.1 Class 2 | 1 | 98870A969 | 0000 | ||
| 1 5/8" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 5 | 98870A627 | 00000 | ||
| 2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A610 | 0000 | ||
| 2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 5 | 98870A876 | 00000 | ||
| 2 1/2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | Not Rated | ASME B17.1 Class 2 | 1 | 98870A697 | 0000 | ||
| 2 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A615 | 0000 | ||
| 3" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A620 | 0000 | ||
| 3" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 1 | 98870A917 | 0000 | ||
| 3 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A625 | 0000 | ||
| 3 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 1 | 98870A912 | 0000 | ||
Zinc-Plated 1008-1045 Carbon Steel | ||||||||||
1/2" × 1/2" | ||||||||||
| 1 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 1 | 95053A991 | 0000 | ||
Machine Keys
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Tolerance | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Specs. Met | Pkg. Qty. | Pkg. | |||
1008-1045 Carbon Steel | ||||||||||
1/2" × 1/2" | ||||||||||
| 1" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 1 | 98870A480 | 00000 | ||
| 1" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | ASME B17.1 Class 1 | 1 | 98870A341 | 0000 | ||
| 1 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | ASME B17.1 Class 1 | 5 | 98870A292 | 00000 | ||
| 1 5/8" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 5 | 98870A485 | 00000 | ||
| 1 5/8" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Not Rated | ASME B17.1 Class 1 | 5 | 98870A336 | 0000 | ||
| 2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | — | 5 | 98870A490 | 00000 | ||
| 2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | ASME B17.1 Class 1 | 5 | 98870A293 | 00000 | ||
| 2 1/2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | Not Rated | ASME B17.1 Class 2 | 5 | 98870A325 | 00000 | ||
| 2 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | ASME B17.1 Class 1 | 5 | 98870A294 | 00000 | ||
| 3" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B97 | ASME B17.1 Class 1 | 5 | 98870A296 | 00000 | ||
| 3 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B97 | ASME B17.1 Class 1 | 5 | 98870A298 | 00000 | ||
Machine Key Stock
1008-1045 Carbon Steel
Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/4" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98830A533 | 00000 | ||
| 1/4" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98830A534 | 0000 | ||
| 3/8" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98830A305 | 0000 | ||
| 3/8" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98830A149 | 0000 | ||
| 1/2" × 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 98830A350 | 0000 | ||
| 1/2" × 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 98830A542 | 0000 | ||
36" Long | ||||||||
| 1/2" × 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 98830A911 | 00000 | ||
| 1/2" × 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 98830A543 | 00000 | ||
72" Long | ||||||||
| 1/2" × 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 98830A630 | 00000 | ||
Zinc-Plated 1008-1045 Carbon Steel
Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/8" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A106 | 000000 | ||
| 3/16" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A121 | 00000 | ||
| 1/4" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A140 | 0000 | ||
| 1/4" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98510A181 | 0000 | ||
| 5/16" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A153 | 00000 | ||
| 5/16" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98510A182 | 0000 | ||
| 3/8" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A167 | 0000 | ||
| 3/8" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98510A184 | 0000 | ||
| 7/16" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 98491A180 | 0000 | ||
| 7/16" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98510A186 | 00000 | ||
| 1/2" × 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 98491A187 | 0000 | ||
| 1/2" × 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 98510A187 | 0000 | ||
36" Long | ||||||||
| 3/8" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 98491A424 | 00000 | ||
| 1/2" × 1/2" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 98491A427 | 00000 | ||
| 1/2" × 1/2" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 98491A428 | 00000 | ||
1095 Spring Steel
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Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/4" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A156 | 000000 | ||
| 5/16" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A164 | 00000 | ||
| 3/8" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A172 | 00000 | ||
| 7/16" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A184 | 00000 | ||
| 1/2" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A190 | 00000 | ||
36" Long | ||||||||
| 1/2" × 1/2" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 98535A590 | 00000 | ||
18-8 Stainless Steel
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Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 3/16" × 1/2" | Standard | -0.008" to 0.008" | -0.015" to 0.015" | Rockwell B80 | 92530A118 | 000000 | ||
| 1/4" × 1/2" | Standard | -0.008" to 0.008" | -0.015" to 0.015" | Rockwell B80 | 92530A137 | 00000 | ||
| 3/8" × 1/2" | Standard | -0.008" to 0.008" | -0.015" to 0.015" | Rockwell B80 | 92530A166 | 00000 | ||
| 1/2" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B82 | 98493A187 | 00000 | ||
| 1/2" × 1/2" | Undersized | -0.004" to 0.000" | -0.004" to 0.000" | Rockwell B82 | 92530A187 | 00000 | ||
36" Long | ||||||||
| 1/2" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B82 | 92530A321 | 00000 | ||
| 1/2" × 1/2" | Undersized | -0.004" to 0.000" | -0.004" to 0.000" | Rockwell B82 | 92530A322 | 00000 | ||
316/316L Stainless Steel
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Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/4" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Not Rated | 98530A494 | 000000 | ||
| 1/4" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B86 | 98530A140 | 00000 | ||
| 3/8" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Not Rated | 98530A594 | 00000 | ||
| 3/8" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B86 | 98530A167 | 00000 | ||
| 1/2" × 1/2" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Not Rated | 98530A492 | 00000 | ||
| 1/2" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B86 | 98530A187 | 00000 | ||
36" Long | ||||||||
| 1/2" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B86 | 98530A430 | 00000 | ||
416 Stainless Steel
Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/2" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B86 | 99374A140 | 000000 | ||
6061 Aluminum
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Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/2" × 1/2" | Standard | -0.009" to 0.009" | -0.009" to 0.009" | Not Rated | 99108A120 | 000000 | ||
Nylon 6/6
Tolerance | ||||||||
|---|---|---|---|---|---|---|---|---|
Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Each | |||
12" Long | ||||||||
| 1/2" × 1/2" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Durometer 80D | 94446A946 | 000000 | ||
Tapered Gib Keys
Tolerance | Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Ht. | Wd. | Ht. | Lg. | End Ht. | Rate of Taper | Specs. Met | System of Measurement | Each | |||
1018-1045 Carbon Steel | ||||||||||||
1/2" × 1/2" | ||||||||||||
| 2" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.484" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A237 | 00000 | ||
| 2 1/2" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.479" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A238 | 0000 | ||
| 3" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.474" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A239 | 0000 | ||
| 3 1/2" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.469" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A240 | 0000 | ||
| 4" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.464" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A241 | 0000 | ||
| 4 1/2" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.458" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A242 | 0000 | ||
| 5" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.453" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A243 | 0000 | ||
| 5 1/2" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.448" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A244 | 0000 | ||
| 6" | -0.002" to 0.000" | -0.002" to 0.000" | 3/4" | 5/8" | 0.443" | 1:96 | ASME B17.1 Class 1 | Inch | 98471A245 | 0000 | ||
Tapped Rounded Machine Keys
Tolerance | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Tolerance Rating | Ht. | Wd. | Min. Hardness | Thread Size | Specs. Met | Each | |||
1018-1045 Carbon Steel | ||||||||||
1/2" × 1/2" | ||||||||||
| 2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | Not Rated | 1/4"-20 | ASME B17.1 Class 2 | 90164A901 | 00000 | ||
Woodruff Keys
Tolerance | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Woodruff Key No. | Wd. | For Keyway Dia. | Ht. | Lg. | Wd. | Ht. | Specs. Met | System of Measurement | Pkg. Qty. | Pkg. | |||
1018-1045 Carbon Steel | |||||||||||||
| V | 1/2" | 2 3/4" | 0.75" | 2.317" | 0.000" to 0.001" | -0.005" to 0.000" | ASME B17.2 | Inch | 5 | 98481A335 | 000000 | ||
| VX | 1/2" | 2 3/4" | 0.594" | 2" | 0.000" to 0.001" | -0.005" to 0.000" | ASME B17.2 | Inch | 5 | 98481A310 | 00000 | ||
8630 Alloy Steel | |||||||||||||
| V | 1/2" | 2 3/4" | 0.75" | 2.317" | 0.000" to 0.001" | -0.005" to 0.000" | ASME B17.2 | Inch | 1 | 98525A335 | 00000 | ||
| VX | 1/2" | 2 3/4" | 0.594" | 2" | 0.000" to 0.001" | -0.005" to 0.000" | ASME B17.2 | Inch | 5 | 98525A310 | 00000 | ||
Fixture Keys
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Rectangle |
For Machine Table T-Slot Wd. | Lg. | Wd. | Ht. | Wd. Tolerance | For Mounting Screw Size | Mounting Fasteners Included | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|
Rectangle | ||||||||||
Steel | ||||||||||
| 1/2" | 3/4" | 1/2" | 1/2" | -0.0005" to 0" | 1/4" | No | 8961A65 | 00000 | ||


































