BS Cycle Thread Gauges

BS Cycle threads are used for Spokes, Nipples, Bolts, Nuts in Bicycle Industry.

Specification:

Basic Dimensions: BS 811 : 1950 & Gauging Practice: BS 919 Part II : 2007.

Manufacturing Range :

Sizes covered are SWG series for spokes & Nipples – SWG 8,9,10 & 11, Diameter 1/8 to 31/32 with various TPI as specified in specification.

DIAMETER/ SIZE	TPI	Thread Plug Gauges	Thread Ring Gauges	Check Plug Gauges to check NEW Rings.	Wear Check Plug Gauges to check/ calibrate used Rings.

DIAMETER/ SIZE	TPI	Thread Plug Gauges	Thread Ring Gauges	Check Plug Gauges to check NEW Rings.	Wear Check Plug Gauges to check/ calibrate used Rings.
For Spokes and Nipples
SWG 11	44	Tolerance Class	Tolerance Class	Tolerance Class	Tolerance Class
SWG 10,SWG9	40	Medium (M)	Medium (M)	Medium (M)	Medium (M)
SWG 8	32
For Bolts and Nuts
1/8	40	Tolerance Class	Tolerance Class	Tolerance Class	Tolerance Class
		Close (C)	Close (C)	Close(C)	Close (C )
5/32, 3/16	32	Medium (M)	Medium (M)	Medium (M)	Medium (M)
7/32 ,1/4, 9/32, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8,11/16, 3/4,	26	Free (F)	Free (F)	Free (F)	Free (F)
For Special Thread Applications

7/8, 1, 1.290, 1.3701.9/16, 1.5/8	24	Tolerance Class	Tolerance Class	Tolerance Class	Tolerance Class
1.1/8, 1.45,17 / 64	26	Medium (M)	Medium (M)	Medium (M)	Medium (M)
31/32	30

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