Dimensions
Schrader valves are classified by their material, diameter of intended rim hole, length, and shape.
- TR-4 - straight metal stem (8 mm dia.)
- TR-6 - straight metal stem (8 mm dia.)
- TR-13 - straight rubber stem (11.5 mm dia.)
- TR-15 - straight rubber stem (16 mm dia.)
- TR-87 - short 90° metal stem (10 mm dia.)
- TR-87C - tall 90° metal stem (10 mm dia.)
and also :
- TR 413- 0.453" rim hole diam.(11,50mm) 1,25" long (=31,8mm)
- TR 415- 0.625" rim hole diam.(15,87mm) 1,25" long (=31,8mm)
- TR 418- 0.453" rim hole diam.(11,50mm) 2" long (=50,8mm)
- TR 425- 0.625" rim hole diam.(15,87mm) 2" long (=50,8mm)
The standard Schrader valve has the following threads:
External thread
- Metric: 7.7 mm OD, thread root diameter is 6.9 mm × 0.794 mm pitch.
- Imperial: 0.305 in OD, thread root diameter 0.271 in × 32 tpi (threads per inch)
Internal thread (to accept the threaded valve core)
- Metric: 5.30 mm OD × 0.706 mm pitch
- Imperial: 0.209 in OD × 36 tpi.
For refrigeration, a 1/4" male flare fitting is used, with the same internal thread as above.
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