Steel with Stainless Steel Ball

Steel bodies are made of 12L14 material with a black oxide finish.

Balls are 440 stainless.

The locking element holds the plunger body securely in place without the need for lock nuts or other devices. We recommend a 90 degree countersink 1/32″ larger than the major diameter of the mating thread to prevent damaging the element.

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

All part numbers ending with a “P” do NOT have a locking element.

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

Part #ProjectionBall DiameterBody LengthThread SizesEnd Pressure Start (lbs.)End Pressure Full (lbs.)Hex DiameterColor CodeMaterialsPressuresLocking ElementBuyhf:tax:projectionhf:tax:ball_diameterhf:tax:body_lengthhf:tax:threadhf:tax:end_pressure_lbs_starthf:tax:end_pressure_lbs_fullhf:tax:hex_diameterhf:tax:color_codehf:tax:materialhf:tax:pressurehf:tax:locking_element
10005H
0250939-1610-320-51-55-64plainsteellightyes
10005HP
0250939-1610-320-51-55-64plainsteellightno
10006H
0250939-1610-321-535-64blacksteelmediumyes
10006HP
0250939-1610-321-535-64blacksteelmediumno
10007H
0250939-1610-32255-64yellowsteelheavyyes
10007HP
0250939-1610-32255-64yellowsteelheavyno
10008H
03512543-641-4-20245-64plainsteellightyes
10008HP
03512543-641-4-20245-64plainsteellightno
10009H
03512543-641-4-20375-64blacksteelmediumyes
10009HP
03512543-641-4-20375-64blacksteelmediumno
10010H
03512543-641-4-204125-64yellowsteelheavyyes
10010HP
03512543-641-4-204125-64yellowsteelheavyno
10011H
04015623-325-16-1824-53-32plainsteellightyes
10011HP
04015623-325-16-1824-53-32plainsteellightno
10012H
04015623-325-16-18493-32blacksteelmediumyes
10012HP
04015623-325-16-18493-32blacksteelmediumno
10013H
04015623-325-16-186173-32yellowsteelheavyyes
10013HP
04015623-325-16-186173-32yellowsteelheavyno
10014H
04818713-163-8-162-555-32plainsteellightyes
10014HP
04818713-163-8-162-555-32plainsteellightno
10015H
04818713-163-8-165105-32blacksteelmediumyes
10015HP
04818713-163-8-165105-32blacksteelmediumno
10016H
04818713-163-8-166215-32yellowsteelheavyyes
10016HP
04818713-163-8-166215-32yellowsteelheavyno
10017H
0722811-3-641-2-13367-32plainsteellightyes
10017HP
0722811-3-641-2-13367-32plainsteellightno
10018H
0722811-3-641-2-136127-32blacksteelmediumyes
10018HP
0722811-3-641-2-136127-32blacksteelmediumno
10019H
0722811-3-641-2-136307-32yellowsteelheavyyes
10019HP
0722811-3-641-2-136307-32yellowsteelheavyno
10020H
0963751-15-645-8-114-591-4plainsteellightyes
10020HP
0963751-15-645-8-114-591-4plainsteellightno
10021H
0963751-15-645-8-119181-4blacksteelmediumyes
10021HP
0963751-15-645-8-119181-4blacksteelmediumno
10022H
0963751-15-645-8-117501-4yellowsteelheavyyes
10022HP
0963751-15-645-8-117501-4yellowsteelheavyno