Description

Large bulk lot of 390 vintage three-arm clamping knobs featuring a triangular, three-prong design, molded plastic construction, and metal female-threaded inserts.

These hand-tightening knobs are designed for convenient manual gripping and adjustment. They may be suitable for compatible equipment, machinery, fixtures, furniture, restoration projects, or other hardware applications.

The knobs feature U.S. Design Patent No. D271843, associated with Hirsh Company and issued in 1983.

This listing includes 390 knobs sold together as one bulk lot. The original application and thread specifications have not been confirmed.

Specifics

Product: Three-Arm Clamping / Tightening Knobs
Quantity: 390 Pieces
Color: Light Gray / Beige
Material: Molded Plastic with Metal Threaded Inserts
Design: Three-Arm / Triangular / Three-Lobe
Overall Width: Approximately 42.17 mm (1.66")
Overall Depth: Approximately 28.41 mm (1.12")
Mounting Section Diameter: Approximately 20.55 mm (0.81")
Thread Type: Female / Internal Thread
Thread Size: Unknown
Patent Number: D271843
Brand: Unconfirmed
Era: Vintage Design

Things to Know

Includes 390 three-arm knobs in one bulk lot.
Knobs appear dirty and may have been previously used.
Expect dust, grime, discoloration, scratches, and other signs of storage or handling.
Thread sizes and compatibility have not been verified.
Individual knobs have not been functionally tested.
Cleaning may be required before use.
Sold as bulk surplus hardware.
Please inspect photographs for appearance, measurements, and condition.

Condition

Used / Vintage Surplus – Cleaning Required

These knobs show noticeable dirt, surface wear, and discoloration. Some or all may have been previously used. They have not been individually inspected or tested, and their exact application is unknown.

Sold as pictured, in as-is surplus condition.

Key Words

390 Clamping Knobs, Three Arm Knobs, 3 Prong Knobs, Three Lobe Knobs, Triangular Knobs, Female Threaded Knobs, Plastic Hand Knobs, Vintage Industrial Hardware, Hirsh Knob Design, Patent D271843, Equipment Adjustment Knobs, Machinery Knobs, Bulk Hardware Lot, Vintage Replacement Parts, Industrial Surplus, Threaded Plastic Handles

Shipping Method

All 390 knobs will be securely packaged for shipment with tracking provided. Multiple orders or items can be combined into one shipment when possible.

390 Vintage 3 Arm Clamping Knobs Threaded Plastic Gray D271843 Bulk Lot

Specifications

Returns Accepted