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Whitworth & British

Whitworth Fine Thread, 12 TPI

An obsolete German Whitworth fine series; not the same as BSF (BS 84). Listed for repair and replacement work.

Standard
DIN LON 282
Flank angle
55°
Sizes listed
14
Range
W 23 x 1/12" – (W 46 x 1/12")
Profile shape (schematic, not to scale)

Thread SizeTapping Drill Size mmCore Area cm²TPIPitch mm
W 23 x 1/12"20.293.23122.117
W 26 x 1/12"23.294.26122.117
(W 28 x 1/12")25.295.02122.117
W 30 x 1/12"27.295.85122.117
(W 32 x 1/12")28.295.74122.117
W 33 x 1/12"30.297.21122.117
W 34 x 1/12"31.297.69122.117
W 36 x 1/12"33.298.70122.117
W 37 x 1/12"34.299.23122.117
W 39 x 1/12"36.2910.33122.117
W 40 x 1/12"37.2910.92122.117
(W 42 x 1/12")39.2912.12122.117
(W 43 x 1/12")40.2912.75122.117
(W 46 x 1/12")43.2914.72122.117
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Related Standards

BSW British Standard Whitworth BS 84 32 rows · W 1/16" – W 4" BSF British Standard Fine BS 84 30 rows · BSF 3/16" – BSF 4 1/4" BA British Association Thread BS 93 26 rows · BA No. 0 – BA No. 25 BSB British Standard Brass BS 84 11 rows · BSB 1/8" – BSB 1 1/2" ME Model Engineer Thread 16 rows · ME 1/8" – ME 1/2" Whitworth Fine Thread 1 DIN 239 91 rows · W 56 x 1/4" – W 499 x 1/4"

Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.