Keysteel Lengths - Square - Carbon Steel

Keysteel Lengths -> Square -> Carbon Steel

There are 11 products in the sub-categories of Keysteel Lengths - Square - Carbon Steel. Browse the Keysteel Lengths - Square - Carbon Steel products table.

Category Details

A selection of Carbon Steel Square Keysteel Lengths. Plain carbon steel key steel. Square steel bar that can be used for keysteel or for small construction projects.

  • An expanded range may be available on special order. Please enquire.
  • Use oversized for replacing keys where the keyway may be slightly worn - standard aftermarket keysteel
  • Use undersized for manufacturing and new applications where the keyway tolerances can be controlled

Small Parts & Bearings

Additional resources:


A more comprehensive listing may be found in the Keysteel Lengths - Square - Carbon Steel category on the MBA Minibearings main store.
Width (s1) Height (s2) Length (L) Indicative
Image
Width (s1)
1.588
mm
+ 0 / - 0.051
(Equiv. 0.063 in.)
Height (s2)
1.588
mm
+ 0 / - 0.051
(Equiv. 0.063 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 1.588x1.588x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 426
Part Number: 4R-0016-0300-KPU (PK-5)
Square Keysteel Lengths - 1.588x1.588x300 mm - Carbon Steel 1045
1 pack (5 pcs) Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.41 AUD
$6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

1 pack (5 pcs) Available Now. Backorder if more than 1.
Width (s1) Height (s2) Length (L) Indicative
Image
Width (s1)
1.588
mm
+ 0 / - 0.051
(Equiv. 0.063 in.)
Height (s2)
1.588
mm
+ 0 / - 0.051
(Equiv. 0.063 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 1.588x1.588x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 426
Part Number: 4R-0016-0300-KPU (PK-5)
Square Keysteel Lengths - 1.588x1.588x300 mm - Carbon Steel 1045
1 pack (5 pcs) Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.41 AUD
$6.41 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

1 pack (5 pcs) Available Now. Backorder if more than 1.
Width (s1)
1.588
mm
+ 0.051 / - 0.00
(Equiv. 0.063 in.)
Height (s2)
1.588
mm
+ 0.051 / - 0.00
(Equiv. 0.063 in.)
Length (L)
914
mm
+/- 3.2
(Equiv. 35.984 in.)
Square Keysteel Lengths - 1.588x1.588x914 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 346
Part Number: 4R-0016-0914-KPO (Each)
Square Keysteel Lengths - 1.588x1.588x914 mm - Carbon Steel 1045
19 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$5.41 AUD
$5.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

19 Available Now. Backorder if more than 19.
Width (s1)
1.588
mm
+ 0.051 / - 0.00
(Equiv. 0.063 in.)
Height (s2)
1.588
mm
+ 0.051 / - 0.00
(Equiv. 0.063 in.)
Length (L)
914
mm
+/- 3.2
(Equiv. 35.984 in.)
Square Keysteel Lengths - 1.588x1.588x914 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 346
Part Number: 4R-0016-0914-KPO (Each)
Square Keysteel Lengths - 1.588x1.588x914 mm - Carbon Steel 1045
19 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$5.41 AUD
$5.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

19 Available Now. Backorder if more than 19.
Width (s1)
3.969
mm
+ 0.051 / - 0.00
(Equiv. 0.156 in.)
Height (s2)
3.969
mm
+ 0.051 / - 0.00
(Equiv. 0.156 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 3.969x3.969x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 233
Part Number: 4R-0039-0300-KPO (Each)
Square Keysteel Lengths - 3.969x3.969x300 mm - Carbon Steel 1045
45 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.68 AUD
$6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

45 Available Now. Backorder if more than 45.
Width (s1)
3.969
mm
+ 0.051 / - 0.00
(Equiv. 0.156 in.)
Height (s2)
3.969
mm
+ 0.051 / - 0.00
(Equiv. 0.156 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 3.969x3.969x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 233
Part Number: 4R-0039-0300-KPO (Each)
Square Keysteel Lengths - 3.969x3.969x300 mm - Carbon Steel 1045
45 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.68 AUD
$6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

45 Available Now. Backorder if more than 45.
Width (s1)
4.000
mm
+ 0.051 / - 0.00
(Equiv. 0.157 in.)
Height (s2)
4.000
mm
+ 0.051 / - 0.00
(Equiv. 0.157 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 4x4x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 1842
Part Number: 4R-0040-0300-KPO (Each)
Square Keysteel Lengths - 4x4x300 mm - Carbon Steel 1045
26 Available Now | Further orders can be expected around Fri, Jan 09, 2026
$4.77 AUD
$4.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

26 Available Now. Backorder if more than 26.
Width (s1)
4.000
mm
+ 0.051 / - 0.00
(Equiv. 0.157 in.)
Height (s2)
4.000
mm
+ 0.051 / - 0.00
(Equiv. 0.157 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 4x4x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 1842
Part Number: 4R-0040-0300-KPO (Each)
Square Keysteel Lengths - 4x4x300 mm - Carbon Steel 1045
26 Available Now | Further orders can be expected around Fri, Jan 09, 2026
$4.77 AUD
$4.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

26 Available Now. Backorder if more than 26.
Width (s1)
4.763
mm
+ 0.051 / - 0.00
(Equiv. 0.188 in.)
Height (s2)
4.763
mm
+ 0.051 / - 0.00
(Equiv. 0.188 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 4.763x4.763x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 1516
Part Number: 4R-0048-0300-KPO (Each)
Square Keysteel Lengths - 4.763x4.763x300 mm - Carbon Steel 1045
20 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.14 AUD
$6.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

20 Available Now. Backorder if more than 20.
Width (s1)
4.763
mm
+ 0.051 / - 0.00
(Equiv. 0.188 in.)
Height (s2)
4.763
mm
+ 0.051 / - 0.00
(Equiv. 0.188 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 4.763x4.763x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 1516
Part Number: 4R-0048-0300-KPO (Each)
Square Keysteel Lengths - 4.763x4.763x300 mm - Carbon Steel 1045
20 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$6.14 AUD
$6.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

20 Available Now. Backorder if more than 20.
Width (s1)
5.000
mm
+ 0.051 / - 0.00
(Equiv. 0.197 in.)
Height (s2)
5.000
mm
+ 0.051 / - 0.00
(Equiv. 0.197 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 5x5x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 241
Part Number: 4R-0050-0300-KPO (Each)
Square Keysteel Lengths - 5x5x300 mm - Carbon Steel 1045
Out of Stock | Backorder Now | Orders can be expected around Sat, Jan 03, 2026
$7.14 AUD
$7.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Width (s1)
5.000
mm
+ 0.051 / - 0.00
(Equiv. 0.197 in.)
Height (s2)
5.000
mm
+ 0.051 / - 0.00
(Equiv. 0.197 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 5x5x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 241
Part Number: 4R-0050-0300-KPO (Each)
Square Keysteel Lengths - 5x5x300 mm - Carbon Steel 1045
Out of Stock | Backorder Now | Orders can be expected around Sat, Jan 03, 2026
$7.14 AUD
$7.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Width (s1)
5.000
mm
+ 0 / - 0.051
(Equiv. 0.197 in.)
Height (s2)
5.000
mm
+ 0 / - 0.051
(Equiv. 0.197 in.)
Length (L)
1000
mm
+/- 3.2
(Equiv. 39.37 in.)
Square Keysteel Lengths - 5x5x1000 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 260
Part Number: 4R-0050-1000-KPU (Each)
Square Keysteel Lengths - 5x5x1000 mm - Carbon Steel 1045
4 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$15.77 AUD
$15.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

4 Available Now. Backorder if more than 4.
Width (s1)
5.000
mm
+ 0 / - 0.051
(Equiv. 0.197 in.)
Height (s2)
5.000
mm
+ 0 / - 0.051
(Equiv. 0.197 in.)
Length (L)
1000
mm
+/- 3.2
(Equiv. 39.37 in.)
Square Keysteel Lengths - 5x5x1000 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 260
Part Number: 4R-0050-1000-KPU (Each)
Square Keysteel Lengths - 5x5x1000 mm - Carbon Steel 1045
4 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$15.77 AUD
$15.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

4 Available Now. Backorder if more than 4.
Width (s1)
6.000
mm
+ 0.051 / - 0.00
(Equiv. 0.236 in.)
Height (s2)
6.000
mm
+ 0.051 / - 0.00
(Equiv. 0.236 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 6x6x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 167
Part Number: 4R-0060-0300-KPO (Each)
Square Keysteel Lengths - 6x6x300 mm - Carbon Steel 1045
Out of Stock | Backorder Now | Orders can be expected around Sat, Jan 03, 2026
$11.23 AUD
$11.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Width (s1)
6.000
mm
+ 0.051 / - 0.00
(Equiv. 0.236 in.)
Height (s2)
6.000
mm
+ 0.051 / - 0.00
(Equiv. 0.236 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 6x6x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 167
Part Number: 4R-0060-0300-KPO (Each)
Square Keysteel Lengths - 6x6x300 mm - Carbon Steel 1045
Out of Stock | Backorder Now | Orders can be expected around Sat, Jan 03, 2026
$11.23 AUD
$11.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Width (s1)
8.000
mm
+ 0.051 / - 0.00
(Equiv. 0.315 in.)
Height (s2)
8.000
mm
+ 0.051 / - 0.00
(Equiv. 0.315 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 8x8x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 164
Part Number: 4R-0080-0300-KPO (Each)
Square Keysteel Lengths - 8x8x300 mm - Carbon Steel 1045
1 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$8.68 AUD
$10.42 AUD $8.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. Backorder if more than 1.
Width (s1)
8.000
mm
+ 0.051 / - 0.00
(Equiv. 0.315 in.)
Height (s2)
8.000
mm
+ 0.051 / - 0.00
(Equiv. 0.315 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 8x8x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 164
Part Number: 4R-0080-0300-KPO (Each)
Square Keysteel Lengths - 8x8x300 mm - Carbon Steel 1045
1 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$8.68 AUD
$10.42 AUD $8.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. Backorder if more than 1.
Width (s1)
9.525
mm
+ 0 / - 0.051
(Equiv. 0.375 in.)
Height (s2)
9.525
mm
+ 0 / - 0.051
(Equiv. 0.375 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 9.525x9.525x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 3705
Part Number: 4R-0095-0300-KPU (Each)
Square Keysteel Lengths - 9.525x9.525x300 mm - Carbon Steel 1045
13 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$14.95 AUD
$14.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

13 Available Now. Backorder if more than 13.
Width (s1)
9.525
mm
+ 0 / - 0.051
(Equiv. 0.375 in.)
Height (s2)
9.525
mm
+ 0 / - 0.051
(Equiv. 0.375 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 9.525x9.525x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Standard Undersized    End Colour Code: Red   
Additional stock available from USA subject to Prior Sale = 3705
Part Number: 4R-0095-0300-KPU (Each)
Square Keysteel Lengths - 9.525x9.525x300 mm - Carbon Steel 1045
13 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$14.95 AUD
$14.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

13 Available Now. Backorder if more than 13.
Width (s1)
25.400
mm
+ 0.076 / - 0.00
(Equiv. 1 in.)
Height (s2)
25.400
mm
+ 0.076 / - 0.00
(Equiv. 1 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 25.4x25.4x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 476
Part Number: 4R-0254-0300-KPO (Each)
Square Keysteel Lengths - 25.4x25.4x300 mm - Carbon Steel 1045
2 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$72.32 AUD
$86.78 AUD $72.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.
Width (s1)
25.400
mm
+ 0.076 / - 0.00
(Equiv. 1 in.)
Height (s2)
25.400
mm
+ 0.076 / - 0.00
(Equiv. 1 in.)
Length (L)
300
mm
+/- 3.2
(Equiv. 11.811 in.)
Square Keysteel Lengths - 25.4x25.4x300 mm - Carbon Steel 1045
Material: Carbon Steel 1045    Finish: Plain    Tolerance Type: Oversized    End Colour Code: Blue   
Additional stock available from USA subject to Prior Sale = 476
Part Number: 4R-0254-0300-KPO (Each)
Square Keysteel Lengths - 25.4x25.4x300 mm - Carbon Steel 1045
2 Available Now | Further orders can be expected around Sat, Jan 03, 2026
$72.32 AUD
$86.78 AUD $72.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.