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US Bolts - Tensile Strength and Proof Loads

Tensile strength and proof loads SAE bolts

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US Bolts - Coarse Threads

Tensile Strength

Nom Bolt Size
(in)
Grade
258Lamalloy
Tensile Strength (lb)
1/4 2350 3800 4750 5700
5/16 3900 6300 7850 9450
3/8 5750 9300 11600 13950
7/16 7850 12800 15900 19150
1/2 10500 17000 21300 25550
9/16 13500 21800 27300 32750
5/8 16700 27100 33900 40700
3/4 24700 40100 50100 60100
7/8 27700 55400 69300 83150
1 36400 72700 90900 109100
1 1/8 45800 80100 114400 137350
1 1/4 58100 101700 145400 174400
1 3/8 69300 121300 173200 207900
1 1/2 84300 147500 210800 252900

Proof Load

Nom Bolt Size
(in)
Grade
258Lamalloy
Proof Load (lb)
1/4 1750 2700 3800 4600
5/16 2900 4450 6300 7600
3/8 4250 6600 9300 11250
7/16 5850 9050 12800 15400
1/2 7800 12100 17000 20600
9/16 10000 15500 21800 26400
5/8 12400 19200 27100 32750
3/4 15200 28400 40100 48500
7/8 18400 39300 55400 67000
1 20000 51500 72700 87900
1 1/8 25200 56500 91600 110700
1 1/4 32000 71700 116300 140500
1 3/8 38100 85500 138600 167500
1 1/2 46400 104000 168600 203700

US Bolts Coarse Threads - Proof Loads

US Bolts - Fine Threads

Tensile Strength

Nom Bolt Size
(in)
Grade
258Lamalloy
Tensile Strength (lb)
1/4 2700 4350 5450 6550
5/16 4300 6950 8700 10450
3/8 6500 10550 13200 15800
7/16 8800 14400 17800 21350
1/2 11800 19200 24000 28800
9/16 15000 24400 30400 36550
5/8 18900 30700 38400 46100
3/4 27600 44800 56000 67150
7/8 30500 61100 76400 91600
1 39800 79600 99400 119350
1 1/8 51400 89900 128400 154100
1 1/4 64400 112700 161000 193150
1 3/8 78900 138100 197200 236700
1 1/2 94900 166000 237200 284600

Proof Load

Nom Bolt Size
(in)
Grade
258Lamalloy
Proof Load (lb)
1/4 2000 3100 4350 5280
5/16 3200 4900 6950 8410
3/8 4800 7450 10500 12730
7/16 6550 10100 14200 17200
1/2 8800 13600 19200 23200
9/16 11200 17300 24400 29450
5/8 14100 21800 30700 37100
3/4 20500 31700 44800 54100
7/8 16800 43300 61100 73800
1 21900 56400 79600 96200
1 1/8 28200 63350 102700 124100
1 1/4 35400 79400 128800 155600
1 3/8 43400 97300 157800 190700
1 1/2 52200 117000 189700 229200
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