Product Spotlight:

Our line of Press-Thru (trade marked) spring and ball plungers have the same dimensions, spring pressures, and materials as our standard press fit product line.
Press-Thru™ Spring and Ball Plungers

Our line of Press-Thru™ spring and ball plungers have the same dimensions, spring pressures, and materials as our standard press fit product line. They are designed without the flange on the nose end to allow for the insertion of the plunger from top or bottom, front or back. Simply press the body through the hole until the plunger is flush with the surface. The body is slightly over sized to fit firmly into the hole. Please contact us for a free sample, or if you need any technical information.

Hex Drive "Short" Extended Travel Stainless Steel Spring Plungers
Product Information

All stainless parts are 303 material.

Delrin® noses prevent marring of aluminum, brass or other soft materials.

Hex Drive Plungers use a positive drive for insertion and removal.

Plungers may be ordered with or without the locking element. Plungers without locking element are the same price, but are considered "specials" and cannot be returned. We recommend using without the locking element for applications in aluminum.

The locking element holds the plunger body securely in place witout the need for lock nuts or other devices. We recommend a 90° countersink 1/32" larger than the major diameter of the mating thread to prevent damaging the element.

End pressures are given in pounds. Full pressures are the force pounds needed to move the nose to the distance show in "C" column.

To prevent possible spring damage, use of a Northwestern Wrench is recommended when installing from plunger end.


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Hex Drive Short Extended Travel Steel Spring Plungers
Part
Number
Without
Locking Ele.
End Press. - Lbs.
Start
End Press. - Lbs.
Full
A B C DHex Dia.
E
Net lbs
Per 100
Steel Body - Heat Treated Black Oxide Steel Nose
33144H 33144HP 0.5 1.25 6-32 7/16 .062 .046 3/64 1/2
33145H 33145HP 1.0 3.25 8-32 1/2 .093 .070 5/64 1/2
33146H 33146HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33147H 33147HP 1.25 4.25 10-32 9/16 .125 .093 3/32 1/2
33148H 33148HP 2.0 7.0 1/4-20 5/8 .187 .119 1/8 1/2
33149H 33149HP 2.0 9.0 5/16-18 23/32 .187 .135 5/32 1
33150H 33150HP 3.0 12.5 3/8-16 29/32 .187 .186 3/16 2
33151H 33151HP 3.5 19.0 1/2-13 1-3/64 .250 .248 1/4 4
33152H 33152HP 4.5 33.5 5/8-11 1-3/8 .312 .310 5/16 8
Steel Body - Brown Delrin® Nose
33044H 33044HP 0.5 1.25 6-32 7/16 .062 .046 3/64 1/2
33045H 33045HP 1.0 3.25 8-32 1/2 .093 .070 5/64 1/2
33046H 33046HP 1.0 3.25 8-36 1/2 .093 .070 5/64 1/2
33047H 33047HP 1.25 4.25 10-32 9/16 .125 .093 3/32 1/2
33048H 33048HP 2.0 7.0 1/4-20 5/8 .187 .119 1/8 1/2
33049H 33049HP 2.0 9.0 5/16-18 23/32 .187 .135 5/32 1
33050H 33050HP 3.0 12.5 3/8-16 29/32 .187 .186 3/16 1-1/2
33051H 33051HP 3.5 19.0 1/2-13 1-3/64 .250 .248 1/4 3-1/2
33052H 33052HP 4.5 33.5 5/8-11 1-3/8 .312 .310 5/16 6-1/2