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General

Colour

Red / Yellow

Bright Drawn

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 analysis0.45% carbon maximum, 0.60/1.00% maganese, 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		Metric Squares
Up to and including 7/8"	+.002"/-0	4mm up to and including 6mm	+0/-.030mm
Over 7/8" up to and including 1-1/4"	+.003"/-0	Over 6mm up to and including 12mm	+0/-.036mm
Over 1-1/4"	+.004"/-0	16mm	+0/-.043mm

Imperial Flats
	Width (-.000")	Thickness (-000")
Up to and including 3/4 x 1/2"	+.002"	+.003"
7/8 x 5/8"	+.002"	+.004"
Over 7/8 x 5/8" up to and including 1-1/4 x 7/8"	+.003"	+.004"
1-1/2 x 1"	+.004"	+.006"
Metric Flats
	Width (+.000mm)	Thickness (+.000mm)
8mm x 7mm up to and including 10mm x 8mm	-.036mm	-.090mm
Over 10mm x 8mm up to and including 16mm x 10mm	-.043mm	-.090mm
18mm x 11mm	-.043mm	-.110mm
Over 18mm x 11mm up to and including 28mm x 16mm	-.052mm	-.110mm
32mm x 18mm	-.062mm	-.110mm

Squares Bright Drawn Stock Size Range

Size (ins)

1/8

3/16

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1 1/4

1 1/2

Size (mm)

Flats Bright Drawn Stock Size Range

Size (ins)	5/16 x 1/4	7/16 x 5/16	5/8 x 7/16	7/8 x 5/8	1 1/4 x 7/8
Size (ins)	3/8 x 1/4	1/2 x 5/16	3/4 x 1/2	1 x 3/4	1 1/2 x 1
Size (mm)	8 x 7	14 x 9	20 x 12	28 x 16	40 x 22
	10 x 8	16 x 10	22 x 14	32 x 18	45 x 25
	12 x 8	18 x 11	25 x 14	36 x 20	50 x 28

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