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MARYLAND METRICS
THREAD DATA CHARTS

Whitworth Gas Cylinder Thread according to DIN 477


W    Cylindrical Whitworth Thread according to DIN 477
Thread call out P
Gg/1“ / TPI
Core- Min.4) Nut Thread Minor- Max. Drill-
B
W 21,8 x 1/14 14 19,496 20,066 19,75
W 24,32 x 1/14 14 22,016 22,586 22,25
W 1 x 1/8 8 21,339 22,152 22,00

W    Taper Whitworth Thread according to DIN 477
Thread call out P
Gg/1“ / TPI
Gauge plane of tap Lm Drill- cylindrical Max. Drill-
taper 5)
B
W 19,8 x 1/14 keg. 14 24,2 14,7 16,8
W 28,8 x 1/14 keg. 14 29,2 22,7 25,4
W 31,3 x 1/14 keg. 14 29,2 25,2 27,9

4) Minor- of nut thread accord. to DIN 477 part 1
5) For mass production preparation of a taper core hole is recommended. (BK)
Notes: DIN 477 is similar to ISO 11116-1
The symbol = diameter

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