Call Us: (604) 524 2658 - E-Mail sales@pacbolt.com

MPA & Tensile Strengths.

Grade2

Cap Screw Diameter Course Thread Fine Thread
Threads Per Inch Tensile Strength Min. Lb. Proof Load Min. Lb. Threads Per Inch Tensile Strength Min. Lb. Proof Load Min. Lb.
1/4″ 20 2350 1750 28 2700 2000
5/16″ 18 3900 2900 24 4300 3200
3/8″ 16 5750 4250 24 6500 4800
7/16″ 14 7850 5850 20 8800 6550
1/2″ 13 10500 7800 20 11800 8800
9/16″ 12 13500 10000 18 15000 11200
5/8″ 11 16700 12400 18 18900 14100
3/4″ 10 24700 18400 16 27600 20500
7/8″ 9 27700 15200 14 30500 16800
1″ 8 26400 20000 12 39800 21900
1 1/8″ 7 45800 25200 12 51400 28200
1 1/4″ 7 58100 32000 12 64400 35400
1 1/2″ 6 84300 46400 12 94900 52200

Grade 5

Cap Screw Diameter Course Thread Fine Thread
Threads Per Inch Tensile Strength Min. Lb. Proof Load Min. Lb. Threads Per Inch Tensile Strength Min. Lb. Proof Load Min. Lb.
1/4″ 20 3800 2700 28 4350 3100
5/16″ 18 6300 4450 24 6950 4900
3/8″ 16 9300 6600 24 105050 7450
7/16″ 14 12800 9050 20 14200 10100
1/2″ 13 17000 12100 20 19200 13600
9/16″ 12 21800 15500 18 24400 17300
5/8″ 11 27100 19200 18 30700 21800
3/4″ 10 40100 28400 16 44800 31700
7/8″ 9 55400 39300 14 61100 43300
1″ 8 72700 51500 12 79600 56400
1 1/8″ 7 80100 56500 12 89900 63300
1 1/4″ 7 101700 71700 12 112700 79400
1 1/2″ 6 147500 104000 12 166000 117000

Grade 8

Cap

Screw

Diameter

Course Thread Fine Thread
Threads

Per

Inch

Tensile

Strength

Min. Lb.

Proof

Load

Min. Lb.

Threads

Per

Inch

Tensile

Strength

Min. Lb.

Proof

Load

Min. Lb.

1/4″ 20 4750 3800 28 5450 4350
5/16″ 18 7850 6300 24 8700 6950
3/8″ 16 11600 9300 24 13200 10500
7/16″ 14 15900 12800 20 17800 14200
1/2″ 13 21300 17000 20 24000 19200
9/16″ 12 27300 21800 18 30400 24400
5/8″ 11 33900 27100 18 38400 30700
3/4″ 10 50100 40100 16 56000 44800
7/8″ 9 69300 55400 14 76400 61100
1″ 8 90900 72700 12 99400 79600
1 1/8″ 7 114400 91600 12 128400 102700
1 1/4″ 7 145400 116300 12 161000 128800
1 1/2″ 6 210800 168600 12 237200 189700
Back to Top