Carr Lane 4BLPB3.50 Ball Lock Pin Button Head

The Carr Lane CL-4-BLPB-3.50 Ball Lock Pin with Button Handle is a high‑strength, quick‑release alignment pin designed for fast, repeatable positioning in jigs and fixtures. This is a single‑acting ball lock pin built on a precision‑ground shank, with the locking balls held by a push button and released when the button is pressed. It has a 1/4" nominal diameter (A DIA NOMINAL 1/4", A DIA ACTUAL.2485 /.2470) and the grip length is indicated by the suffix, so “-3.50” denotes a 3.50" grip length. Carr Lane offers Button Handle pins in alloy steel or stainless steel, with standard grip lengths listed in their tables and custom grip lengths up to 12" (300 mm) available on request. Ball Lock Pins in this family are designed to provide positive locking until released by the button, allowing quick insertion and reliable engagement in tooling, fixtures, and workholding setups. The CL-4‑BLPB size sits within Carr Lane’s range of diameters from 3/16" to 1" and is part of their reported four handle styles for ball lock pins (T, L, Button, Ring), ensuring a suitable option for applications requiring a simple, durable push‑button release.