HEADLINE BUILDING MATERIALS TRADING LLC
P.O. Box 37366, Dubai U.A.E. l Tel: +971 4 3475675 l Fax: +971 4 347 5485
Web: www.hbm.ae l Email: commercial@hbm.ae
Stud Bolts ASTM A193
Inch Series, UNC/UN – Dimensions
Notes:
1. The stud Bolts will generally conform to ASTM A193 Gr: B7
2. Thread will conform to Class 2A unified coarse threads as
per ANSI B1.1
3. Material: Medium Carbon Chromium Molybdenum Steel,
CR-Mo Alloy Steel (Cr-Mo).
4. Heat treatment: As per Grade ‘B7’
5. All dimensions are in inches.
Nominal
Thread
Size ‘D’
TPI
D
L
Length Range
‘L’
Nominal Thread
Size ‘D’
UNC
UN
½”
13
-
up to 120”
5/8”
11
-
¾”
10
7/8”
TPI
Length Range
‘L’
UNC
UN
2 3/8”
-
8
up to 50”
up to 120”
2 ½”
-
8
up to 60”
-
up to 120”
2 5/8”
-
8
up to 60”
9
-
up to 120”
2 ¾”
-
8
up to 60”
1”
8
-
up to 120”
2 7/8”
-
8
up to 60”
11/8”
-
8
up to 120”
3”
-
8
up to 48”
11/4”
-
8
up to 120”
3 1/8”
-
8
up to 48”
13/8”
-
8
up to 120”
3 1/4”
-
8
up to 48”
1½”
-
8
up to 120”
3 3/8”
-
8
up to 48”
15/8”
-
8
up to 120”
3 ½”
-
8
up to 48”
1¾”
-
8
up to 120”
3 5/8”
-
8
up to 48”
17/8”
-
8
up to 120”
3 ¾”
-
8
up to 48”
2”
-
8
up to 120”
3 7/8”
-
8
up to 48”
21/8”
-
8
up to 120”
4”
-
8
up to 48”
21/4”
-
8
up to 120”
-
-
-
HEADLINE BUILDING MATERIALS TRADING LLC
P.O. Box 37366, Dubai U.A.E. l Tel: +971 4 3475675 l Fax: +971 4 347 5485
Web: www.hbm.ae l Email: commercial@hbm.ae
Stud Bolts ASTM A193
Inch Series, UNC/UN – Physical Properties, Tightening Torques
Physical Properties
Physical
Properties
Diameter
Range
Grade
‘B7’
Tensile Strength (min.)
2 ½ and under
125,000 (860)
psi (N/mm2)
Over 2 ½” to 4”
115,000 (795)
Yield Strength (min.)
2 ½” and under
105,000 (720)
psi (N/mm2)
Over 2 ½” to 4”
95,000 (655)
Elongation % on GL
2 ½” and under
16%
4D (min.)
Over 2 ½” to 4”
16%
Reduction of Area
2 ½” and under
50%
% (min.)
Over 2 ½” to 4”
50%
Tightening Torque
Nominal
Thread
Size
Grade ‘B7’
Stress
Area
TORQUE
INDUCES
LOAD
in2
ft-lb
Lbf
½”
0.142
86.98
5/8”
0.226
¾”
Grade ‘B7’
Stress
Area
TORQUE
INDUCES LOAD
8 UN
in2
ft-lb
lbf
10,437
2-3/8”
3.987
11,599.70
293,045
173.03
16,611
2 ½”
4.440
13,597.50
326,340
0.334
306.86
24,549
2-5/8”
4.921
14,317.06
327,247
7/8”
0.462
495.21
33,957
2 ¾”
5.430
16,550.19
361,095
1”
0.606
742.35
44,541
2-7/8”
5.953
18,969.00
395,875
11/8”
0.790
1,088.72
58,065
3”
6.510
21,645.75
432,915
11/4”
1.000
1,531.25
73,500
3-1/8”
7.084
24,535.73
471,086
13/8”
1.233
2,076.82
90,625
3 1/4”
7.690
27,700.02
511,385
1½”
1.492
2,741.55
109,662
3-3/8”
8.312
31,092.08
552,748
15/8”
1.780
3,543.31
130,830
3 ½”
8.960
34,757.33
595,840
1¾”
2.080
4,459.00
152,880
3-5/8”
9.639
38,726.72
640,994
17/8”
2.410
5,535.47
177,135
3 ¾”
10.340
42,975.63
687,610
2”
2.770
6,786.50
203,595
3-7/8”
11.064
47,517.58
735,756
21/8”
2.152
8,205.05
231,672
4”
11.810
52,357.67
785,365
21/4”
2.560
9,812.225
261,660
UNC
8 UN
Nominal
Thread Size
UNC