Carbon Key Steel – Flat
Finish: Bright Drawn
USAKEY – Carbon Key Steel – Colour: Red/Yellow
Bright: BS 46: Part 1: 1958, BS 4235: Part 1: 1972
Characteristics:
USAKEY is supplied in the form of Bright Drawn Steel Bars to dimensions and tolerances stipulated in BS 46: Part 1: 1958 ‘Keys and Keyways’ for imperial sizes and BS 4235: Part 1: 1972 ‘Parallel and Taper Keys’ for metric sizes. All imperial bars are supplied to the chemical analysis 0.45% Carbon maximum, 0.60/1.00% Manganese, whilst metric bars are supplied to 0.42/0.50% Carbon, 0.50/0.80% Manganese.
Form of Supply:
Bright bars: As drawn with a tensile strength 540-700 N/mm²
Tolerances:
| Imperial Flats (plus tolerances) | Width | Thickness |
|---|---|---|
| Up to and incl. 3/4 x 1/2” | +.002” | +.003” |
| 1 x 3/4 “and 1.1/4 x 7/8” | +.003” | +.004” |
| 1.1/2 x 1” | +.004” | +.006” |
| Metric Flats (minus tolerances) | Width | Thickness | |
|---|---|---|---|
| 8mm x 7mm Up to and incl. | 10mm x 8mm | -.036mm | -.090mm |
| Over 10mm x 8mm Up to and incl. | 16mm x 10mm | -.043mm | -.090mm |
| 18mm x 11mm | -.043mm | -.110mm | |
| Over 18mm x 11mm Up to and incl. | 28mm x 16mm | -.052mm | -.110mm |
| 32mm x 18mm | -.062mm | -.110mm | |
| Over 32mm x 18mm Up to and incl. | 50mm x 28mm | -.062mm | -.130mm |
Stocked sizes - Flats - Inches
| 1/4 | 7/16 | 1/2 | 3/4 | 7/8 | 1 | |
|---|---|---|---|---|---|---|
| 3/8 | x | |||||
| 5/8 | x | |||||
| 5/16 | x | |||||
| 3/4 | x | |||||
| 1 | x | |||||
| 1.1/4 | x | |||||
| 1.1/2 | x |
Stocked sizes - Flats - mm
| 7 | 8 | 9 | 10 | 11 | 12 | 14 | 16 | 18 | 20 | 22 | 25 | 28 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8 | x | ||||||||||||
| 10 | x | ||||||||||||
| 12 | x | ||||||||||||
| 14 | x | ||||||||||||
| 16 | x | ||||||||||||
| 18 | x | ||||||||||||
| 20 | x | ||||||||||||
| 22 | x | ||||||||||||
| 25 | x | ||||||||||||
| 28 | x | ||||||||||||
| 32 | x | ||||||||||||
| 36 | x | ||||||||||||
| 40 | x | ||||||||||||
| 45 | x | ||||||||||||
| 50 | x |
Lengths – Standard bar lengths are 3/3.5 metres
Carbon Steel
Flat – KEY
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