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Starrett Steel Rules

Steel Rules

  •  Spring-Tempered
  •  Satin chrome finish
  •  Quick Reading
  • Available in semi-flexible and full flexible
  • Styles of graduation: English, Metric, and English/Metric
Size
Graduation
Width
Spring Temper Part No.
Full Flexible Part No.
6"
3R
1/2"
--
C303R-6
6"
4R
3/4"
C604R-6
--
6"
5R
1/2"
--
C305R-6
6"
16R
1/2"
--
C316R-6
6"
16R
3/4"
C616R-6
--
150mm
34
12.7mm
--
C334-150
150mm
35
12.7mm
C635-150
--
12"
4R
1"
C604R-12
--
12"
5R
1/2"
--
C305R-12
12"
16R
1/2"
--
C316R-12
12"
16R
1"
C616R-12
--
300mm
35
25.4mm
C635-300
--
18"
4R
1-1/8"
C604R-18
--
18"
5R
3/4"
--
C305R-18
18"
16R
3/4"
--
C316R-18
500mm
35
28.6mm
C635-500
--
24"
4R
1-1/4"
604R-24
--
24"
5R
3/4"
--
C305R-24
24"
16R
3/4"
--
C316R-24
24"
16R
1-1/4"
C416R-24
--
24"
4R
1-1/4"
C604R-24
--
24"
5R
3/4"
--
C305R-24
24"
16R
3/4"
--
C316R-24
24"
16R
1-1/4"
C416R-24
--
36"
4R
1-1/4"
C604R-36
C305R-36
36"
5R
3/4"
--
C316R-36
36"
16R
3/4"
--
--
100mm
35
31.8mm
C635-1000
--
48"
4R
1-1/4"
C604R-48
--
48"
16R
1-1/2"
C416R-48
--
72"
4R
1-1/2"
C404R-72
--
72"
16R
1-1/2"
C416R-74
--
96"
4R
1.675"
C404R-96
--
96"
16R
1.675"
C416R-96
--
120"
4R
1.675"
C404R-120
--
120"
16R
1.675"
C416R-120
--
144"
4R
1.675"
C404R-144
--
144"
16R
1.675"
C416R-144
--

Rule Graduation Chart

Graduation
Description
3R
1/32, 1/64, 1/10 and 1/50ths
4R
1/8, 1/16, 1/32, and 1/64ths
5R
1/32, 1/64, 1/10, and 1/100ths
16R
1/32, 1/64, 1/50, and 1/100ths
34
1/10, 1/100, 1/2mm and mm
35
1/2mm and mm, both sides

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