Bright Drawn Carbon Key Steel – Flat and Square

Finish: Bright Drawn

USAKEY – Carbon Key Steel – Colour: Red/Yellow
Bright: BS 46: Part 1: 1958, BS 4235: Part 1: 1972
BS 4235: Part 2: 1977

Characteristics:

USAKEY is supplied 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 Drawn: Zinc and Chromate passivated for protection.
Lengths: 13”
Tensile Strength: 540-700 N/mm²
Small Box: Approximately 1 kg in weight.
Standard Box: Approximately 5 kgs in weight with the exception of small sizes.

Tolerances:

Imperial Flats -	Width	Thickness
Up to and incl. 3/4 x 1/2	+.002”	+.003”
7/8 x 5/8	+.002”	+.004”
Over 7/8 x 5/8 Up to 1.1/4 x 7/8	+.003”	+.004”
1.1/2 x 1	+.004”	+.006”

Metric Flats -	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

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 – Inches

Squares 13” Lengths Boxed

ins. Sq.	1/8	3/16	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4
No. of lengths in small box	12	10	8	7	4	4	3	2	1	1
No. of lengths in standard box	48	43	36	30	20	15	11	9	7	5

Flats 13” Lengths Boxed

ins.	5/16 x 1/4	3/8 x 1/4	7/16 x 5/16	1/2 x 5/16	5/8 x 7/16	3/4 x 1/2	7/8 x 5/8	1 x 3/4
No. of lengths in small box	7	6	4	4	2	2	1	1
No. of lengths in standard box	36	30	21	18	10	8	5	4

Squares Boxed Assortment No.1 Imperial

ins. Sq.	1/8	3/16	1/4	5/16	3/8	7/16	1/2	5/8	3/4
No. of lengths in small box	1	1	1	1	1	1	1	-	-
No. of lengths in standard box	2	2	3	2	3	2	3	1	1

Stocked sizes – mm.

Squares 13” Lengths Boxed

mm. Sq.	4	5	6	8	10	12	16
No. of lengths in small box	10	8	7	5	4	3	1
No. of lengths in standard box	50	40	32	30	19	13	7

Flats 13” Lengths Boxed

mm.	8 x 7	10 x 8	12 x 8	14 x 9	16 x 10	18 x 11	20 x 12	22 x 14	25 x 14
No. of lengths in small box	5	4	3	3	2	2	2	1	1
No. of lengths in standard box	32	25	19	14	12	9	7	6	5

Squares Boxed Assortment No.1 Metric

mm. Sq.	4	5	6	8	10	12	16
No. of lengths in small box	1	1	1	1	1	1	-
No. of lengths in standard box	8	8	5	5	3	2	2