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A325 Heavy Hex Bolt, Galvanized

ASTM F3125 Grade A325 heavy hex bolts are high strength structural bolts manufactured from medium carbon steel, carbon boron, or medium carbon alloy steel. A325 hex bolts are available in diameters from 1/2" through 1 1/2" inclusive. Dimensional specifications are governed by ASME B18.2.6. Grade markings for grade A325 heavy hex bolts include both the grade symbol "A325" and the manufacturer's identification mark. Inch series fasteners meeting ASTM F3125 Grade A325 specifications are intended for use in steel to steel structural connections. Grade A325 heavy hex bolts offer a heavy pattern head to increase the bearing surface and distribute the clamping load over a larger area. Available in hot dip galvanized finish, which provides a corrosion resistant zinc coating.

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Governing Standards
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Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsA325

Per ASME B18.2.6-2010
Nominal Diameter		UNC	UNF	E		F			G		H			LT	Y
				Body Diameter		Width Across Flats			Width Across Corners		Head Height			Thread Length	Transition Length
				Max	Min	Basic	Max	Min	Max	Min	Basic	Max	Min	Ref	Max
1/2	0.500	13	20	0.515	0.482	7/8	0.875	0.850	1.010	0.969	11/32	0.364	0.302	1.000	0.190
5/8	0.625	11	18	0.642	0.605	1 1/16	1.062	1.031	1.227	1.175	27/64	0.444	0.378	1.250	0.220
3/4	0.750	10	16	0.768	0.729	1 1/4	1.250	1.212	1.443	1.383	1/2	0.524	0.455	1.380	0.250
7/8	0.875	9	14	0.895	0.852	1 7/16	1.438	1.394	1.660	1.589	37/64	0.604	0.531	1.500	0.280
1	1.000	8	14	1.022	0.976	1 5/8	1.625	1.575	1.876	1.796	43/64	0.700	0.591	1.750	0.310
1 1/8	1.125	7	12	1.149	1.098	1 13/16	1.812	1.756	2.093	2.002	3/4	0.780	0.658	2.000	0.340
1 1/4	1.250	7	12	1.277	1.223	2	2.000	1.938	2.309	2.209	27/32	0.876	0.749	2.000	0.380
1 3/8	1.375	6	12	1.404	1.345	2 3/16	2.188	2.119	2.526	2.416	29/32	0.940	0.810	2.250	0.440
1 1/2	1.500	6	12	1.531	1.470	2 3/8	2.375	2.300	2.742	2.622	1	1.036	0.902	2.250	0.440

All dimensions are in inches.

A325 Heavy Hex Bolt, Galvanized

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Diameter Thread Pitch Length Threading Item # Availability Price Quantity UOM

1/2

1 1/4

Partial

325G0500125-I

269 In Stock

$0.52717/EA

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1/2-13 X 1 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.52717/EA

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269 In Stock

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Quantity	Price
Quantity	Price
1	$0.52717/EA
90	$0.50328/EA
340	$0.4463/EA
1500	$0.34388/EA

1/2

1 1/2

Partial

325G0500150-I

1216 In Stock

$0.5691/EA

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1/2-13 X 1 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.5691/EA

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1216 In Stock

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Quantity	Price
Quantity	Price
1	$0.5691/EA
80	$0.5433/EA
310	$0.48179/EA
1370	$0.37122/EA

1/2

1 3/4

Partial

325G0500175-I

2879 In Stock

$0.75022/EA

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1/2-13 X 1 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.75022/EA

Qty

2879 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.75022/EA
70	$0.71622/EA
280	$0.63514/EA
1240	$0.48938/EA

1/2

Partial

325G0500200-I

599 In Stock

$0.58665/EA

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1/2-13 X 2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.58665/EA

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599 In Stock

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Quantity	Price
Quantity	Price
1	$0.58665/EA
70	$0.56006/EA
260	$0.49666/EA
1130	$0.38268/EA

1/2

2 1/2

Partial

325G0500250-I

1076 In Stock

$0.99206/EA

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1/2-13 X 2 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.99206/EA

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1076 In Stock

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Quantity	Price
Quantity	Price
1	$0.99206/EA
60	$0.94709/EA
220	$0.83987/EA
970	$0.64713/EA

1/2

Partial

325G0500300-I

1284 In Stock

$1.0113/EA

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1/2-13 X 3 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.0113/EA

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1284 In Stock

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Quantity	Price
Quantity	Price
1	$1.0113/EA
50	$0.96547/EA
190	$0.85617/EA
840	$0.65968/EA

1/2

Partial

325G0500500-I

39 In Stock

$1.61784/EA

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1/2-13 X 5 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.61784/EA

Qty

39 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.61784/EA
40	$1.54451/EA
130	$1.36966/EA
560	$1.05533/EA

5/8

1 1/2

Partial

325G0620150-I

364 In Stock

$1.03739/EA

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5/8-11 X 1 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.03739/EA

Qty

364 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.03739/EA
50	$0.99037/EA
180	$0.87825/EA
810	$0.6767/EA

5/8

1 3/4

Partial

325G0620175-I

3-5 Working Days

$0.92832/EA

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5/8-11 X 1 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$0.92832/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$0.92832/EA
50	$0.88625/EA
170	$0.78591/EA
750	$0.60555/EA

5/8

Partial

325G0620200-I

1936 In Stock

$1.18538/EA

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5/8-11 X 2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.18538/EA

Qty

1936 In Stock

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Quantity	Price
Quantity	Price
1	$1.18538/EA
40	$1.13166/EA
160	$1.00354/EA
690	$0.77323/EA

5/8

2 1/4

Partial

325G0620225-I

818 In Stock

$1.24957/EA

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5/8-11 X 2 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.24957/EA

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818 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.24957/EA
40	$1.19293/EA
150	$1.05788/EA
640	$0.8151/EA

5/8

2 1/2

Partial

325G0620250-I

629 In Stock

$1.51692/EA

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5/8-11 X 2 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.51692/EA

Qty

629 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.51692/EA
40	$1.44817/EA
140	$1.28422/EA
590	$0.9895/EA

5/8

Partial

325G0620300-I

602 In Stock

$1.62959/EA

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5/8-11 X 3 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.62959/EA

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602 In Stock

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Quantity	Price
Quantity	Price
1	$1.62959/EA
30	$1.55573/EA
120	$1.37961/EA
520	$1.06299/EA

5/8

Partial

325G0620600-I

66 In Stock

$4.51875/EA

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5/8-11 X 6 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.51875/EA

Qty

66 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.51875/EA
25	$4.31396/EA
70	$3.82557/EA
500	$2.94762/EA

3/4

1 1/2

Partial

325G0750150-I

378 In Stock

$2.24865/EA

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3/4-10 X 1 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.24865/EA

Qty

378 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.24865/EA
30	$2.14674/EA
120	$1.9037/EA
520	$1.46681/EA

3/4

1 3/4

Partial

325G0750175-I

1885 In Stock

$1.86136/EA

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3/4-10 X 1 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.86136/EA

Qty

1885 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.86136/EA
30	$1.777/EA
110	$1.57583/EA
500	$1.21418/EA

3/4

Partial

325G0750200-I

1189 In Stock

$1.6581/EA

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3/4-10 X 2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.6581/EA

Qty

1189 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.6581/EA
25	$1.58295/EA
100	$1.40374/EA
500	$1.08159/EA

3/4

2 1/4

Partial

325G0750225-I

269 In Stock

$2.04693/EA

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3/4-10 X 2 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.04693/EA

Qty

269 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.04693/EA
25	$1.95416/EA
100	$1.73293/EA
500	$1.33523/EA

3/4

2 1/2

Partial

325G0750250-I

457 In Stock

$1.99175/EA

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3/4-10 X 2 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.99175/EA

Qty

457 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.99175/EA
25	$1.90148/EA
90	$1.68621/EA
500	$1.29923/EA

3/4

2 3/4

Partial

325G0750275-I

334 In Stock

$2.13243/EA

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3/4-10 X 2 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.13243/EA

Qty

334 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.13243/EA
25	$2.03579/EA
90	$1.80531/EA
500	$1.391/EA

3/4

Partial

325G0750300-I

544 In Stock

$3.16792/EA

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3/4-10 X 3 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.16792/EA

Qty

544 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.16792/EA
25	$3.02434/EA
80	$2.68195/EA
500	$2.06646/EA

3/4

3 1/4

Partial

325G0750325-I

457 In Stock

$3.06033/EA

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3/4-10 X 3 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.06033/EA

Qty

457 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.06033/EA
25	$2.92163/EA
80	$2.59087/EA
500	$1.99627/EA

3/4

3 1/2

Partial

325G0750350-I

205 In Stock

$2.85032/EA

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3/4-10 X 3 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.85032/EA

Qty

205 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.85032/EA
25	$2.72114/EA
70	$2.41307/EA
500	$1.85928/EA

3/4

3 3/4

Partial

325G0750375-I

203 In Stock

$1.69953/EA

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3/4-10 X 3 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$1.69953/EA

Qty

203 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.69953/EA
25	$1.6225/EA
70	$1.43882/EA
500	$1.10862/EA

3/4

Partial

325G0750400-I

1989 In Stock

$2.8839/EA

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3/4-10 X 4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.8839/EA

Qty

1989 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.8839/EA
25	$2.7532/EA
70	$2.4415/EA
500	$1.88119/EA

3/4

4 1/2

Partial

325G0750450-I

143 In Stock

$3.90113/EA

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3/4-10 X 4 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.90113/EA

Qty

143 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.90113/EA
25	$3.72432/EA
60	$3.30269/EA
500	$2.54473/EA

3/4

Partial

325G0750500-I

93 In Stock

$3.69615/EA

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3/4-10 X 5 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.69615/EA

Qty

93 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.69615/EA
25	$3.52863/EA
50	$3.12915/EA
500	$2.41102/EA

7/8

1 3/4

Partial

325G0870175-I

447 In Stock

$4.71302/EA

See Quantity Discounts

7/8-9 X 1 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.71302/EA

Qty

447 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.71302/EA
25	$4.49942/EA
80	$3.99003/EA
500	$3.07434/EA

7/8

Partial

325G0870200-I

322 In Stock

$3.66221/EA

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7/8-9 X 2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.66221/EA

Qty

322 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.66221/EA
25	$3.49623/EA
70	$3.10042/EA
500	$2.38889/EA

7/8

2 1/4

Partial

325G0870225-I

134 In Stock

$3.29008/EA

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7/8-9 X 2 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.29008/EA

Qty

134 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.29008/EA
25	$3.14097/EA
70	$2.78538/EA
500	$2.14614/EA

7/8

2 1/2

Partial

325G0870250-I

1741 In Stock

$2.94531/EA

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7/8-9 X 2 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$2.94531/EA

Qty

1741 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.94531/EA
25	$2.81182/EA
70	$2.49349/EA
500	$1.92125/EA

7/8

2 3/4

Partial

325G0870275-I

20 In Stock

$3.0611/EA

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7/8-9 X 2 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.0611/EA

Qty

20 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.0611/EA
25	$2.92237/EA
60	$2.59152/EA
500	$1.99678/EA

7/8

Partial

325G0870300-I

78 In Stock

$3.94103/EA

See Quantity Discounts

7/8-9 X 3 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.94103/EA

Qty

78 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.94103/EA
25	$3.76242/EA
60	$3.33647/EA
500	$2.57076/EA

7/8

3 1/2

Partial

325G0870350-I

43 In Stock

$3.91051/EA

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7/8-9 X 3 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.91051/EA

Qty

43 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.91051/EA
25	$3.73327/EA
50	$3.31062/EA
500	$2.55085/EA

7/8

3 3/4

Partial

325G0870375-I

1556 In Stock

$7.86118/EA

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7/8-9 X 3 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$7.86118/EA

Qty

1556 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.86118/EA
25	$7.50489/EA
50	$6.65525/EA
500	$5.1279/EA

7/8

Partial

325G0870400-I

362 In Stock

$4.97316/EA

See Quantity Discounts

7/8-9 X 4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.97316/EA

Qty

362 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.97316/EA
25	$4.74777/EA
50	$4.21027/EA
500	$3.24403/EA

2 1/4

Partial

325G1000225-I

226 In Stock

$3.01239/EA

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1-8 X 2 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.01239/EA

Qty

226 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.01239/EA
25	$2.87586/EA
50	$2.55028/EA
500	$1.965/EA

2 1/2

Partial

325G1000250-I

42 In Stock

$5.9577/EA

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1-8 X 2 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$5.9577/EA

Qty

42 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.9577/EA
25	$5.68768/EA
50	$5.04377/EA
500	$3.88625/EA

2 3/4

Partial

325G1000275-I

22 In Stock

$4.7388/EA

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1-8 X 2 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.7388/EA

Qty

22 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.7388/EA
25	$4.52403/EA
50	$4.01186/EA
500	$3.09115/EA

Partial

325G1000300-I

117 In Stock

$4.78585/EA

See Quantity Discounts

1-8 X 3 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.78585/EA

Qty

117 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.78585/EA
40	$4.56895/EA
80	$4.05169/EA
180	$3.12185/EA

3 1/4

Partial

325G1000325-I

58 In Stock

$5.25394/EA

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1-8 X 3 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$5.25394/EA

Qty

58 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.25394/EA
40	$5.01582/EA
80	$4.44797/EA
170	$3.42718/EA

3 1/2

Partial

325G1000350-I

18 In Stock

$5.31767/EA

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1-8 X 3 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$5.31767/EA

Qty

18 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.31767/EA
40	$5.07667/EA
80	$4.50193/EA
160	$3.46876/EA

Partial

325G1000400-I

287 In Stock

$4.04435/EA

See Quantity Discounts

1-8 X 4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$4.04435/EA

Qty

287 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.04435/EA
40	$3.86105/EA
70	$3.42394/EA
150	$2.63816/EA

4 1/4

Partial

325G1000425-I

10 In Stock

$7.48296/EA

See Quantity Discounts

1-8 X 4 1/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$7.48296/EA

Qty

10 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.48296/EA
40	$7.14382/EA
70	$6.33506/EA
140	$4.88119/EA

4 1/2

Partial

325G1000450-I

1324 In Stock

$3.95523/EA

See Quantity Discounts

1-8 X 4 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$3.95523/EA

Qty

1324 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.95523/EA
30	$3.77597/EA
60	$3.34849/EA
140	$2.58002/EA

4 3/4

Partial

325G1000475-I

143 In Stock

$7.39927/EA

See Quantity Discounts

1-8 X 4 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$7.39927/EA

Qty

143 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.39927/EA
30	$7.06392/EA
60	$6.26421/EA
140	$4.8266/EA

Partial

325G1000600-I

82 In Stock

$8.71772/EA

See Quantity Discounts

1-8 X 6 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$8.71772/EA

Qty

82 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$8.71772/EA
20	$8.32262/EA
40	$7.3804/EA
90	$5.68663/EA

1 1/4

3 1/2

Partial

325G1250350-I

21 In Stock

$12.851/EA

See Quantity Discounts

1 1/4-7 X 3 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$12.851/EA

Qty

21 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$12.851/EA
20	$12.26857/EA
40	$10.87963/EA
80	$8.3828/EA

1 1/4

Partial

325G1250400-I

41 In Stock

$9.01093/EA

See Quantity Discounts

1 1/4-7 X 4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$9.01093/EA

Qty

41 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$9.01093/EA
20	$8.60254/EA
30	$7.62863/EA
70	$5.87789/EA

1 1/4

4 1/2

Partial

325G1250450-I

34 In Stock

$13.63309/EA

See Quantity Discounts

1 1/4-7 X 4 1/2 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$13.63309/EA

Qty

34 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$13.63309/EA
20	$13.01521/EA
30	$11.54174/EA
70	$8.89296/EA

1 1/4

4 3/4

Partial

325G1250475-I

40 In Stock

$21.92068/EA

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1 1/4-7 X 4 3/4 F3125 Grade A325 Heavy Hex Bolt, Galvanized

$21.92068/EA

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40 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$21.92068/EA
20	$20.92719/EA
30	$18.558/EA
70	$14.29902/EA

ASTM F3125	Covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in diameters through 1-1/2″.
ASME B18.2.6	Covers the general and dimensional data for five products in the inch series recognized as American National Standard. These five structural products include: (a) Heavy Hex Structural Bolts: ASTM A 325 or ASTM A 490; (b) Heavy Hex Nuts: ASTM A 563; (c) Hardened Steel Washers; Circular, Circular Clipped or Beveled: ASTM F436; (d) Compressible Washer-Type Direct Tension Indicators: ASTM F 959; (e) Twist-Off-Type Tension Control Structural Bolts: Heavy Hex and Round: ASTM F1852.
ASME B1.1 UNC & UNF Class 2A	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

SC	Slip Critical Connection
N	Bearing type connection with threads in the shear plane.
X	Bearing type connection with no threads in the shear plane.

Alloy Steel, Quenched & Tempered			Per ASTM F3125/F3125M-15a
Grade A325	Tensile Strength	Yield Strength	Elongation in 4D	Reduction in Area
Grade A325	Min psi	Min psi	Min %	Min %
Inch 120 ksi	120,000	92,000	14	35

Per ASTM F3125/F3125M-15a
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Boron
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
A325 Type 1	Carbon or Alloy Steel with or without Boron	0.30-0.52	0.60 min	0.035 max	0.040 max	0.15-0.30	0.003 max