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  • ASTM F2437-14

ASTM F2437-14

Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs

ASTM International, 06/01/2014

Publisher: ASTM

File Format: PDF

$29.00$58.00


Published:01/06/2014

Pages:6

File Size:1 file , 120 KB

Note:This product is unavailable in Russia, Ukraine, Belarus

1.1 This specification covers the requirements for carbon and alloy steel compressible-washer-type direct tension indicators capable of indicating a specified bolt tension in cap screws, bolts, anchors, and studs.

1.2 Direct tension indicators in nominal diameter sizes 1/4 through 21/2 in. are covered.

1.3 There are two Types of DTIs covered by this specification, Type 1 and Type 2.

1.3.1 Type 1 DTIs are suitable for comparatively large bearing surfaces. Type 1 DTIs are available in Grades 55 and 105, which differ in the amount of tension they indicate at a prescribed gap (see Table 1).

Note 1-Examples of a comparatively large bearing surface would include heavy hex bolts, heavy hex nuts, and so forth.
TABLE 1 Acceptable Range of Compression LoadA

DTI
Nominal
Diameter
(in.)

Mean Compression LoadB Range
in Pounds (lbs)

Mean Compression LoadC Range
in Pounds (lbs)

Grade 5

Grade 8

Grade 55

Grade 105

1/4 

2200 to 2450

3100 to 3450

. . .

. . .

5/16 

3500 to 3850

4950 to 5500

. . .

. . .

³/8 

5300 to 5850

7500 to 8300

. . .

. . .

7/16 

7200 to 7900

10 100 to 11 200

. . .

. . .

1/2 

9700 to 10 700

13 700 to 15 340

4450 to 4900

8500 to 9400

9/16 

12 350 to 13 600

17 400 to 19 200

5700 to 6300

10 900 to 12 050

5/8 

15 550 to 17 200

21 850 to 24 200

7050 to 7800

13 500 to 15 000

³/4 

22 600 to 25 000

31 900 to 35 300

10 500 to 11 600

20 000 to 22 150

7/8 

30 850 to 34 100

43 550 to 48 100

14 500 to 16 000

27 650 to 30 550

1

40 200 to 44 400

56 700 to 62 700

19 000 to 21 000

36 250 to 40 100

11/8 

40 250 to 44 450

73 150 to 80 900

23 950 to 26 450

47 300 to 52 300

11/4 

51 100 to 56 450

91 750 to 101 450

30 400 to 33 600

59 850 to 66 150

1³/8 

61 150 to 67 600

112 450 to 124 250

38 550 to 42 600

73 800 to 81 600

11/2 

74 350 to 82 150

135 150 to 149 400

44 050 to 48 700

89 300 to 98 700

15/8 

. . .

. . .

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