Stubs Iron Wire Gauge
The Stubs Iron Wire Gauge system (also known as the Birmingham Wire Gauge) is used to specify thickness or diameter of metal wire, strip, and tube products. The Stubs system was the first wire gauge recognized as a standard by any country when Great Britain adopted it in 1884; though nearly obsolete, it is the only wire gauge recognized in the United States through an Act of Congress.
The gauge starts at the lowest gauge number of 5Ø or 00000, corresponding to the largest size of 0.500" (12.7mm) to the highest gauge number of 36, corresponding to the smallest size of 0.004" (0.102mm). Size steps between gauges range from 0.001" between high gauge numbers to 0.046" between the two lowest gauge numbers and do not correspond to a particular mathematical pattern, although for the most part the steps get smaller with increasing gauge number. Concerning wire and fine tubing, the gauge number is used to specify the outside diameter of the product, whereas for larger mechanical tubing the gauge number specifies the wall thickness independent of the overall size of the tube.
In medicine, the Stubs system specifies the outside diameter of hypodermic needles, catheters, and suture wires. It was originally developed in early 19th-century England for use in wire manufacture, and it began appearing in a medical setting in the early 20th century.
Another common needle gauge system is the French catheter scale.
Needle wire gauge was derived from the Stubs Iron Wire Gauge.
- Machinery's Handbook 27. New York, NY: Industrial Press, Inc. 2004. p. 2520.
- ISO 9626: Stainless steel needle tubing for the manufacture of medical devices, 1st ed. Geneva: International Organization for Standardization, 1991: 1–2.
- ISO 9626: Stainless steel needle tubing for the manufacture of medical devices, Amendment 1. Geneva: International Organization for Standardization, 2001: 1–2.
- Wonsik Ahn, Jae-Hyon Bahk, Young-Jin Lim (2002). "The "Gauge" System for the Medical Use". Anesthesia & Analgesia 95 (4): 1125. doi:10.1097/00000539-200210000-00076.
- Iserson KV (1987). "The origins of the gauge system for medical equipment". J Emerg Med 5 (1): 45–8. doi:10.1016/0736-4679(87)90009-6. PMID 3295010.
- Sheet Metal Gauge Size Data - Engineers Edge
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