Metric Spring Bolts come with or without pull knob.

Press Release Summary:

Available with or without internal thread in plunger pin, GN 313 Spring Bolts can be operated manually via Push/Pull Knob, or mechanically in types without knob, where plunger pin will protrude only as long as it is in operation mode. Threaded body of plunger is steel with black oxide finish and plunger pin is 303 stainless steel, chemically nickel-plated. In addition, RoHS-compliant bolts have matte black plastic knob and steel lock nut with black oxide finish.

Original Press Release:

J.W. Winco Spring Bolt Options Include Knobs, Internal Threads

NEW BERLIN, WI – J.W. Winco, Inc., a leading supplier of standard industrial machine components, announced it now offers GN 313 Spring Bolts, in metric sizes.  Versions with or without pull knob are available, as well as with or without internal thread in the plunger pin.

The plunger pin in these RoHS-complaint spring bolts does not protrude in the inoperative position.  It can be operated manually via the Push/Pull Knob, or in the case of the types without a Push/Pull knob, it can be operated mechanically (via a pneumatic cylinder, cam plate, etc.), where the plunger pin will protrude only as long as it is in the operation mode.

An application example for the types with internal threads would be using the internal thread on the pressure side, for operation of special pressure bolts or a rod arrangement.

The threaded body of the plunger is steel, with black oxide finish.  Plunger pin is stainless steel, European Standard No. 1.4305 (American Standard Series 303), chemically nickel plated.  Knob is matte black plastic (Polyamide PA), not removable. Lock nut is steel, black oxide finish, DIN 439/ISO 4035.

J.W. Winco offers an extensive selection of inch and metric size adjustable levers, cabinet U-handles, plastic and steel hinges and locking mechanisms, revolving and retractable handles, hand wheels, hand cranks, tube connection and conveyor components, inch and metric construction tubing, shock absorption mounts, leveling mounts, hand knobs, spring, ball and indexing plungers, jig, fixture and fastening components, retaining magnet assemblies, toggle clamps, metric casters and wheels, universal joints, oil sight glasses, and metric tools for the industrial and commercial equipment industries.  J.W. Winco’s website catalog, with 3D CAD and online buying, is viewable at

For more information, contact J.W. Winco at 800-877-8351, by fax at 800-472-0670, on the Web at, and via e-mail at

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