4155 N. 1000E (Wally Parks Dr.)
Adjacent To O'Reilly Raceway Park
Brownsburg, IN 46112
8:00 - 5:00 M-F, 8:00 - 12:00 Sat. - EST
 

Home About MPH Products Tech. Info. Contact Sale Terms
 
AN - NAS - MS
Hardware
 

 

   

Torque Specifications for Aluminum Fittings

 

One of the most frequently asked questions is how tight should the connection between the fitting and the adapter be?

The correct answer is to follow the specification guidelines listed below. This will give the proper tightness to allow for a good seal, but prevents damage to the fitting by over torque.

TORQUE SPECIFICATION GUIDELINES

Size

Minimum Torque1

Maximum Torque1

-2

50

80

-3

70

105

-4

100

140

-6

150

195

-8

270

350

-10

360

430

-12

460

550

-16

700

840

-20

850

1020

1Torque values are shown in inch pounds for aluminum fittings.

There may be times when the correct torque wrench may not be available. In these cases you can follow one of the alternate tightening methods listed at right.

Please note that these methods are for aluminum performance fittings and adapters.

Remember, over-tightening will result in possible damage to the fitting, resulting in possible leaks.

Alternate Tightening Method 1

Flats Method:
Here are the steps for an excellent method of tightening. Anyone can tell if the joint was tightened and how much. 

1. Tighten the nut by hand until it bottoms the seats. 
2.Using a marker, draw a line lengthwise on the nut and extend it onto the adapter. 
3.Using a wrench, rotate the nut to tighten. Turn the nut the amount shown on the chart.

Size

Number of Hex Flats Rotations

-4 1-1⁄2 to 1-3⁄4
-6 1 to 1-1⁄2
-8 1-1⁄4 to 1-3⁄4
-10 1-1⁄4 to 1-3⁄4
-12 1to 1-1⁄2
-16  3⁄4 to 1
-20 1⁄2 to 3⁄4

Alternate Tightening Method 2

The second alternate method of tightening is very simple and easy to remember. Bring the nut to hand tight and then rotate a quarter of a turn. This applies to all sizes. Mark the fitting as indicated in the flat method to confirm the quarter turn.

 

 

Custom Hoses

Brake, clutch and other hi-pressure applications
(steel braided, crimp on ends - straight, 45,
90, banjo)
Many colors available

Stop By The Store


 

 


copyright 2007 Midwest Performance Hardware
MPH, Midwest Performance Hardware, XRP, Aeroquip, Autosol, racing parts, aircraft hardware, Aircraft bolts, Jet nuts, performance pluming, ARP, Prolong, racing hardware, aerospace hardware, Holley parts, Moroso, Competition Engineering, Holochrome, Copaslip, racing supplies, hot rod parts, Jeg's, Summit, Moroso, racing, hose, hose ends, rod bolts, racing bolts, drag racing parts, chassis parts, Dzus, Tyraps, Thomas and Betts, SMC, air hose, fittings, Purosil, anderson plugs, adapters, high performance, brake hoses, brake lines, top fuel, funny car, pro stock, super comp., super comp, pro gas, pro mod, pro mod., engine parts, racing engine parts, NAS bolts, AN bolts, MS bolts, washers, nuts, AN washers, hutchins, hutchens device