Tap Specifications Catalog

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Standard Specifications

Whitworth Thread Tap Series

Whitworth Straight Flute Machine Tap with Thick Shank (ISO 529 Standard Overall Dimensions)

Straight FLUTE TAPS

Features

The product overall dimension conforms to ISO 529.

Straight FLUTE TAPS

Specifications

(unit: mm)

Thread Size	TYPE	T.P.I	L Overall length	l Thread Length	l1 Cutting Length	ln Length to neck	d₀ Shank diameter	K Square size	FLUTES
1/4-20BSW	1	20	66	19	4.5P	29	6.3	5.0	3
5/16-18BSW	2	18	72	22	4.5P	35	8.0	6.3	3
3/8-16BSW	2	16	80	24	4.5P	36	10.0	8.0	3

Whitworth Thread Tap Series

Whitworth Straight Flute Machine Tap with Thin Shank (ISO 529 Standard Overall Dimensions)

SPIRAL FLUTE TAPS

Features

The product overall dimension conforms to ISO 529.

SPIRAL FLUTE TAPS

Specifications

(unit: mm)

Thread Size	T.P.I	L Overall length	l Thread Length	l1 Cutting Length	d₀ Shank diameter	K Square size	FLUTES
5/16-18BSW	18	72	22	4.5P	6.3	5.0	3
3/8-16BSW	16	80	24	4.5P	8.0	6.3	3/4
7/16-14BSW	14	85	25	4.5P	8.0	6.3	4
1/2-12BSW	12	89	29	4.5P	9.0	7.1	4
9/16-12BSW	12	95	30	4.5P	11.2	9.0	4
5/8-11BSW	11	102	32	4.5P	12.5	10.0	4
3/4-10BSW	10	112	37	4.5P	14.0	11.2	4
7/8-9BSW	9	118	38	4.5P	16.0	12.5	4

Whitworth Thread Tap Series

Whitworth Thread Spiral Point Machine Tap with Thin Shank (ISO 529 Standard Overall Dimensions)

Spiral Point Taps

Features

The product overall dimension conforms to ISO 529.

Spiral Point Taps

Specifications

(unit: mm)

Thread Size	TYPE	T.P.I	L Overall length	l Thread Length	l1 Cutting Length	ln Length to neck	d₀ Shank diameter	K Square size	FLUTES
1/4-20BSW	1	20	66	19	5.5P	29	6.3	5.0	3
5/16-18BSW	2	18	72	22	5.5P	35	8.0	6.3	3
3/8-16BSW	2	16	80	24	5.5P	36	10.0	8.0	3

Whitworth Thread Tap Series

Whitworth Thread Spiral Point Machine Tap with Thin Shank (ISO 529 Standard Overall Dimensions)

Spiral Point Taps

Features

The product overall dimension conforms to ISO 529.

Spiral Point Taps

Specifications

(unit: mm)

Thread Size	T.P.I	L Overall length	l Thread Length	l1 Cutting Length	d₀ Shank diameter	K Square size	FLUTES
5/16-18BSW	18	72	22	5.5P	6.3	5.0	3
3/8-16BSW	16	80	24	5.5P	8.0	6.3	3
7/16-14BSW	14	85	25	5.5P	8.0	6.3	3
1/2-12BSW	12	89	29	5.5P	9.0	7.1	3
9/16-12BSW	12	95	30	5.5P	11.2	9.0	4
5/8-11BSW	11	102	32	5.5P	12.5	10.0	4
3/4-10BSW	10	112	37	5.5P	14.0	11.2	4
7/8-9BSW	9	118	38	5.5P	16.0	12.5	4