Capscrews, Hex Bolts, Bolts.

BOLTS

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Mechanical Properties Of Fasteners Mechanical Properties Of Nuts

Reliant Frame Bolts Grade 8 Alloy Hex Cap Screws Tightening Torques In Kilograms Meters

Bolt Head Marking Chart

Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Bolt Rockwell Hardness		Nut Rockwell Hardness
Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Min	Max	Min	Max
	SAE J429 Grade 1	Low Carbon Steel	1/4" - 1 1/4"	33.000	60.000	36,000	B70	B100
	SAE J429 Grade 2	Low Carbon Steel	1/4 " - 3/4" 3/4" - 1 1/2"	55.000 33.000	60.000 74.000	57.000 36.000	B80	B100		C32
	Property Class 5.8	Low or Medium Carbon Steel	M5 - M24	55.100 (380)	75.400 (520)		B82	B95		C32
	SAE J429 Grade 5	Medium Carbon Steel, Quenched and Tempered	1/4 - 1 1" - 1-1/2"	85,000 74,000	120,000 105,000	92,000 81,000	C25 C19	C34 C30		C32
	ASTM A449	Medium Carbon Steel, Quenched and Tempered	1/4" - 1" 1" - 1-1/2 1-1/2" - 3"	85,000 74,000 55,000	120,000 105,000 90,000	92,000 81,000 58,000				C32
	SAE J429 Grade 5.1	Low or Medium Carbon Steel, Quenched and Tempered	No. 6 thru 3/8	85,000	120,000		C25	C40
	SAE J429 Grade 5.2	Low Carbon Martensitic Steel, Quenched and Tempered	1/4 thru 1	85,000	120,000	92,000
	ASTM A325 Type 1	Medium Carbon Steel, Quenched and Tempered	1/2 thru 1 1-1/8 thru 1-1/2	85,000 74,000	120,000 105,000	92,000 81,000
A325	ASTM A325 Type 2	Low Carbon Martensitic Steel, Quenched and Tempered	1/2 thru 1	85,000	120,000	92,000
A325	ASTM A325 Type 3	Atmospheric Corrosion Resisting Steel, Quenched and Tempered	1/2 thru 1 1-1/8 thru 1-1/2	85,000 74,000	120,000 105,000	92,000 81,000
Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Bolt Rockwell Hardness		Nut Rockwell Hardness
Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Min	Max	Min	Max
BB	ASTM A354 Grade BB	Alloy Steel, Quenched and Tempered	1/4 thru 2-1/2 2-3/4 thru 4	80,000 75,000	105,000 100,000	83,000 78,000
BC	ASTM A354 Grade BC	Alloy Steel, Quenched and Tempered	1/4 thru 2-1/2 2-3/4 thru 4	105,000 95,000	125,000 115,000	109,000 99,000
	Property Class 9.8	Medium carbon steel, Quenched & tempered	M1.6 - M16	94.250 (650)	130.500 (900)		C27	C36		C32
	SAE J429 Grade 7	Medium Carbon Alloy Steel, Quenched and Tempered	1/4 thru 1-1/2	105,000	133,000	115,000
	SAE J429 Grade 8	Medium Carbon Alloy Steel, Quenched and Tempered	1/4 thru 1-1/2	120,000	150,000	130,000
	ASTM A354 Grade BD	Alloy Steel, Quenched and Tempered	1/4 thru 1-1/2	120,000	150,000	130,000
No Grade Mark	SAE J429 Grade 8.1	Medium Carbon Alloy or SAE 1041 Modified Elevated Temperature Drawn Steel	1/4 thru 1-1/2	120,000	150,000	130,000
	SAE Grade 8.2	Low carbon boron martensite steel fully killed fine grain quenched & tempered	1/4" - 1"	120.000	150.000		C35	C42
Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Bolt Rockwell Hardness		Nut Rockwell Hardness
Identification Grade Mark	Specifications	Material	Normal Size Dia. In	Proof Load PSI (Mpa)	Tensile Strength Min. PSI (Mpa)	Yield Strength Min. PSI	Min	Max	Min	Max
A490	ASTM A490	Alloy Steel, Quenched and Tempered	1/2 thru 1-1/2	120,000	150,000 min 170,000 max	130,000
No Grade Mark	ISO R898 Class 4.6	Medium Carbon Steel, Quenched and Tempered	All Sizes thru 1-1/2	33,000	60,000	36,000
No Grade Mark	ISO R898 Class 5.8	Medium Carbon Steel, Quenched and Tempered	All Sizes thru 1-1/2	55,000	74,000	57,000
8.8 or 88	ISO R898 Class 8.8	Alloy Steel, Quenched and Tempered	All Sizes thru 1-1/2	85,000	120,000	92,000
10.9 or 109	ISO R898 Class 10.9	Alloy Steel, Quenched and Tempered	All Sizes thru 1-1/2	120,000	150,000	130,000
	Property Class 10.9	Medium carbon alloy steel quenched & tempered	M6 - M36	120.350 (830)	150.800 (1040)		C33	C39	C26	C36
	Property Class 12.9	Medium carbon alloy steel quenched & tempered	M1.6 - M36	140.000 (970)	176.900 (1220)		C38	C44	C26	C36

Mechanical
Mechanical Properties Of Fasteners

CLASS

New Designation

4.6

4.8

5.6

5.8

6.6

6.8

6.9

8.8

10.9

12.9

14.9

Formerly

10K

12K

U.S. GRADE

Brinell

min.

max.

110

170

140

215

170

245

225

300

280

365

330

425

390

Rockwell

min.

max.

102

min.

max.

Yield Point psi

45,000

56,000

76,000

91,000

128,000

153,000

180,000

Tensile
Strength psi

min.

max.

56,000

78,000

70,000

100,000

85,000

113,000

85,338

99,561

113,784

128,000

142,230

170,676

170,000

200,000

230,000

Cap Screws
Hex Cap Screws

Nominal
Or Basic Product Dia.

^LT

Body Diameter

Width Across Flats

Width
Across
Corners

Head Height

Radius of Fillet

Thread

Lngth.

For Screw Lengths < 6 In.

For Screw Lengths > 6 In.

Max.

Min.

Basic

Max.

Min.

Max.

Min.

Basic

Max.

Min

Min.

Basic

1/4	0.2500
5/16	0.3125
3/8	0.3750
7/16	0.4375

0.2500
0.3125
0.3750
0.4375

0.2450
0.3065
0.3690
0.4305

7/16
1/2
9/16
5/8

0.438
0.500
0.562
0.625

0.428
0.489
0.551
0.612

0.505
0.577
0.650
0.722

0.488
0.557
0.628
0.698

5/32
13/64
15/64
9/32

0.163
0.211
0.243
0.291

0.150
0.195
0.226
0.272

0.015
0.015
0.015
0.015

0.750
0.875 1.000 1.125

1.000
1.125
1.250
1.375

1/2	0.5000
9/16	0.5625
5/8	0.6250
3/4	0.7500

0.5000
0.5625
0.6250
0.7500

0.4930
0.5545
0.6170
0.7410

3/4
13/16
15/16
1-1/8

0.750
0.812
0.938
1.125

0.736
0.798
0.922
1.100

0.866
0.938
1.083
1.299

0.840
0.910
1.051
1.254

5/16
23/64
25/64
15/32

0.323
0.371
0.403
0.483

0.302
0.348
0.378
0.455

0.015
0.020
0.020
0.020

1.250
1.375
1.500
1.750

1.500
1.625
1.750
2.000

7/8	0.8750
1	1.0000
1-1/8	1.1250
1-1/4	1.250

0.8750
1.0000
1.1250
1.2500

0.8660
0.9900
1.1140
1.2390

1-5/16
1-1/2
1-11/16
1-7/8

1.312
1.500
1.688
1.875

1.285
1.469
1.631
1.812

1.516
1.732
1.949
2.165

1.465
1.675
1.859
2.066

35/64
39/64
11/16
25/32

0.563
0.627
0.718
0.813

0.531
0.591
0.658
0.749

0.040
0.060
0.060
0.060

2.000
2.250
2.500
2.750

2.250
2.500
2.750
3.000

1-3/8	1.3750
1-1/2	1.5000

1.3750
1.5000

1.3630
1.4880

2-1/6
2-1/4

2.062
2.250

1.994
2.175

2.382
2.598

2.273
2.480

27/32
15/16

0.878
0.974

0.810
0.902

0.060
0.060

3.000
3.250

3.250
3.500

Grade 8 Alloy
Reliant Frame Bolts Grade 8 Alloy

Nominal
Size Or Basic Major Dia. Of Thread

^LT

Body Dia.

Width Across Flats

Width
Across
Corners

Flange
Dia.

Flange Thickness

Head Height

Thread Lngth.

L<6 In.

L>6 In.

Max.

Min.

Basic

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Basic

3/8	0.3750
1/2	0.5000
5/8	0.6250
3/4	0.7500

0.3750
0.5000
0.6250
0.7500

0.3690
0.4930
0.6170
0.7410

9/16
3/4
15/16
1-1/8

0.5625
0.7500
0.9375
1.1250

0.551
0.736
0.922
1.100

0.650
0.866
1.083
1.299

0.618
0.825
1.034
1.234

0.81
1.07
1.33
1.59

0.06
0.08
0.10
0.11

0.39
0.51
0.62
0.73

0.25
0.34
0.42
0.51

1.000
1.250 1.500 1.750

1.250
1.500
1.750
2.000

Nuts
Mechanical Properties Of Nuts

Normal Diameter mm	Pitch mm	Nominal Stress Area mm²	Property Classes Of Nuts
			4	5	6	8	10	12	14
			Proof Load kfg
M6 M7	1 1	20.1 28.9	800 1,150	1,000 1,450	1,200 1,730	1,600 2,300	2,000 2,900	2,400 3,470	2,800 4,000
M8 M10 M12	1.25 1.5 1.75	36.6 58 84.3	1,450 2,300 3,350	1,830 2,900 4,210	2,200 3,500 5,050	2,900 4,600 6,700	3,650 5,800 8,400	4,300 6,950 10,000	5,100 8,100 11,800
M14 M16	2 2	115 157	4,600 6,300	5,750 7,850	6,900 9,400	9,200 12,600	11,500 15,700	13,800 18,800	16,100 22,000
M20 M24	2.5 3	245 353	9,800 14,100	12,200 17,600	14,700 21,200	19,600 28,200	24,500 35,300	29,400 42,300	34,300 49,400
M27 M30 M33	3 3.5 3.5	459 561 694	18,400 22,400 27,800	23,000 28,000 34,700	27,600 33,600 41,600	36,700 44,800 55,500	45,900 56,100 69,400	55,000 67,300 83,300	64,300 78,500 97,000
M36	4	817	32,700	40,800	49,000	65,300	81,700	98,000	114,400
M8	1	39.2	1,570	1,960	2,350	3,100	3,900	4,700	5,500
M10 M12 M16	1.25 1.25 1.5	61.2 92.1 167	2,400 3,700 6,700	3,060 4,600 8,350	3,700 5,500 10,000	4,900 7,400 13,400	6,100 9,200 16,700	7,350 11,000 20,000	8,550 12,900 23,400
M20 M24	1.5 2	272 384	10,900 15,400	13,600 19,200	16,300 23,000	21,800 30,700	27,200 38,400	32,600 46,000	38,000 53,800

Torques
Tightening Torques In Kilograms Meters

Grade		Nominal Diameter - Regular Pitch
Grade		M4	M5	M6	M7	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30
8.8	kpm	0.29	0.57	1	1.6	2.5	5	8	13	20	26	36	51	65	98	134
8.8	Pound-Feet	2	4	7	11	18	32	58	94	144	190	260	368	470	707	967
10.9	kpm	0.4	0.8	1.4	2.3	3.5	6	12	18	27	37	51	72	92	138	188
10.9	Pound-Feet	2.9	6	10	16	25	47	83	133	196	269	366	520	664	996	1357
12.9	kpm	0.5	1	1.6	2.7	4	8	14	22	33	45	61	87	110	167	226
12.9	Pound-Feet	3.6	7	11	20	29	58	100	159	235	323	440	628	794	1205	1630

In accordance with good rigging and maintenance practices
All rigging equipment and hardware should be inspected periodically
for wear, abuse and general adequacy.

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Page maintained by Peter . Created: 7/24/96 Updated: 11/16/03