100 Objects #2: 60-Degree Screw

Host Roman Mars and historian Daniel Immerwahr discuss the chaotic lack of material standards in the early 20th-century United States. They highlight the devastating 1904 Baltimore fire, where out-of-town fire hoses could not connect to local hydrants, as a tragic example of this incompatibility. This systemic issue extended to everyday items, traffic lights, and ultimately, the crucial screw threads holding the industrial world together.

This segment explores how the United States used standardization, specifically the humble screw thread, to build its global influence. It highlights Secretary of Commerce Herbert Hoover's technocratic obsession with efficiency and his efforts to persuade manufacturers to adopt uniform standards.

This segment explores the monumental challenge of standardizing the humble screw under Herbert Hoover in the 1920s. While standardizing other items was simple, the screw required universal agreement on thread angles, leading to the adoption of the 60-degree standard in the United States.

During World War II, President Franklin D. Roosevelt used a garden hose analogy to explain why the United States needed to support its allies. However, this analogy highlighted a critical issue: the lack of standardized screw threads between nations, which posed a major obstacle during wartime cooperation.

During World War II, the United States and the United Kingdom faced severe logistical challenges because their military equipment, including screws and ammunition, was completely incompatible. Through a series of wartime meetings, a humbled Britain ultimately agreed to abandon its 55-degree screw thread standard and adopt the US standard to ensure allied efficiency.

Following World War II, the United States leveraged its undamaged industrial capacity to establish dominant global standards. Through examples like the concert A pitch and the octagonal stop sign, the hosts explain how international systems conformed to American specifications to ensure global compatibility.

This segment explores how the United States leveraged its post-World War II industrial dominance to project global power through technical standards rather than traditional colonial territory. While other nations adopted international standards like the metric system, the US maintained its own systems, demonstrating its unique ability to defy global norms.

Roman Mars and historian Daniel Immerwahr discuss the evolution of American imperialism, contrasting its historically quiet, standardized influence with a potential return to overt power projection. They highlight how everyday standards, like screw sets, allow the U.S. to subtly colonize global markets like India.