Carbon Key Steel – Square
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 Squares :
Up to and incl. 7/8 +.002”
Over 7/8 Up to and incl. 1.1/4 +.003”
Over 1.1/4” +.004”
Metric Squares :
4mm Up to and incl. 6mm -.030mm
Over 6mm Up to and incl. 12mm -.036mm
16mm -.043mm
Stocked sizes - Squares - Inches
1/8 | 3/16 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 1 | 1.1/4 | 1.1/2 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
x | x | x | x | x | x | x | x | x | x | x | x | x | x |
Stocked sizes - Squares - mm.
4 | 5 | 6 | 8 | 10 | 12 | 16 |
---|---|---|---|---|---|---|
x | x | x | x | x | x | x |

Carbon Key Steel Square
Download PDF - click link above
Central – Rugby
Call: +44 (0)1788 542 191
rugbysales@aarteebrightbar.com
Paynes Lane, Rugby,
CV21 2UW, England
Northern – Manchester
Call: +44 (0)1204 576 321
manchestersales@aarteebrightbar.com
Stone Hill Road, Farnworth, Bolton,
BL4 7NN, England
Western – Newport
Call: +44 (0)1633 422 944
newportsales@aarteebrightbar.com
Ponthir Road, Caerleon, Newport,
South Wales, NP18 3XH
Southern – Southampton
Call: +44 (0)23 8087 1500
southamptonsales@aarteebrightbar.com
Suite B Testwood Park, Salisbury Road,
Calmore, Southampton, SO40 2RW
North East – Sunderland
Call: +44 (0)191 5200165
newcastlesales@aarteebrightbar.com
Signature House, 3 Azure Court, Doxford
International Business Park, Sunderland,
SR3 3BE. England