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Threading

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Thread standard comes before size and the two are not interchangeable. Metric, BSP and imperial threads differ in pitch and flank angle, so a metric tap will not cut a usable BSP thread even where the diameters look similar. Establishing the standard first avoids a hole that no fastener fits. The flank angle is the part that cannot be seen by eye, which is why the standard is read rather than guessed.

Taps cut internal threads and dies cut external ones, and each needs a holder that will take it. Tap wrenches are sized on the square drive of the tap shank, running 2.50 to 12.00mm, 4.25 to 14.40mm, 4.25 to 17.70mm and 6.80 to 23.25mm on the bar type wrenches here.

Wrench action changes how the tap is turned. A bar type wrench gives even pressure from both hands, which matters when starting a tap square. A ratchet wrench turns without repositioning, which is what allows a tap to be run where there is no room for a full turn of the bar. Ratchet tap wrenches here cover M3 to M8 and M5 to M12 by the tap size rather than by drive.

Die holders are sized on the outside diameter of the die rather than the thread, at 13/16 inch and 1 inch on the three screw pattern holders here. Pipe threading is a separate standard again, covered by metric and imperial ratchet kits at 7 pieces. Questions go over WhatsApp on 07754288583 with the thread being cut.

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Sealey AK3009 Split Die Set 9pc Metric

Model No	AK3009
Brand	Sealey
Contents	3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1, 7 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75mm, Die Holder
Nett Weight	0.588kg

£22.03 £21.60

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Model No	AK872
Brand	Sealey
Contents:Maximum Square Size: 4mm, 7mm
Nett Weight	0.28kg

Model No	AK879WL
Brand	Sealey
Capacity	M5-M12
Length	290mm
Nett Weight	0.42kg

Model No	AK3021
Brand	Sealey
Contents	3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75mm (1 x Plug, 1 x Taper, 1 x Bottom Tap of each)
Nett Weight	0.476kg

Model No	AK321
Brand	Sealey
Contents	Taps & Dies; M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5, M12 x 1.75mm, Tap Wrench, Die Holder, Metric Thread Gauge.
Nett Weight	0.503kg

Model No	AK3024IMP
Brand	Sealey
Contents:Tap and Dies: 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/8"-27 and Double-Ended Tap Wrench & Die Holder with Retention Screw
Nett Weight	1.04kg

Model No	AK3015
Brand	Sealey
Contents	Taps (Taper, Second, Plug), Dies; 3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75mm, Tap Wrench, Die Holder, Screwdriver, Metric Thread Gauge
Nett Weight	1.38kg

ITEM NO	01745
Appearance (Concentrate)	Dark Brown
Appearance (Emulsion)	Milky White
Specific Gravity @ 15°C	0.9 pH @ 5% 9.2
IP 287 Breakpoint Corrosion	3%

Model No	AK3027
Brand	Sealey
Die Holder Range	M3-M12
Nett Weight	0.00kg
Tap Holder Range	M3-M12

Model No	AK301
Brand	Sealey
Contents	Taps & Dies; 3 x 0.5, 3 x 0.6, 4 x 0.7, 4 x 0.75, 5 x 0.8, 5 x 0.9, 6 x 0.75, 6 x 1, 7 x 0.75, 7 x 1, 8 x 1, 8 x 1.25, 10 x 1.25, 10 x 1.5, 12 x 1.5, 12 x 1.75mm, 1/8"NPT, Tap Wrench, T-Bar Tap Wrench, Die Holder, Thread Gauge, Screwdriver
Nett Weight	1.18kg

Model No	AK3028
Brand	Sealey
Contents	Taps & Dies; 3 x 0.5, 3.5 x 0.6, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.50, 12 x 1.75mm, Tap Wrench, T-Bar Tap Wrench, Die Holder, Thread Gauge
Nett Weight	1.8kg

Model No	AK3028BSW
Brand	Sealey
Contents	Taps (Taper & Plug) & Dies (BSW); 1/8" x 40, 5/32" x 32, 3/16" x 24, 1/4" x 20, 5/16" x 18, 3/8" x 16, 7/16" x 14, 1/2" x 12, Die Holder, Thread Gauge (BSW), T-Handle Tap Wrench, Tap Wrench
Nett Weight	1.8kg

Model No	AK3060
Brand	Sealey
Contents:Taps and Dies: 3x0.5, 4x0.7, 5x0.8, 6X1.0, 7x1.0, 8X1.25, 9x1.25, 10X1.5, 10?1.0, 12?1.75mm, 4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/8"-27, die handle, double end tap wrench, T-handled tap wrench, metric & imperial screw pitch gauge, and slotted 5mm screwdriver.
Nett Weight	1.98kg

Model No	PTK991
Brand	Sealey
Contents	Ratchet Die Stock, Dies; 1/2", 3/4", 1", 1-1/4", 2-Piece Handle
Length	580mm
Nett Weight	4.89kg

Model No	AK3039HM
Brand	Sealey
Contents	Taps & Dies; M3 x 0.5, M3 x 0.6, M4 x 0.7, M4 x 0.75, M5 x 0.8, M5 x 0.9, M6 x 1, 7 x 1, M8 x 1.25, M9 x 1, M9 x 1.25, M10 x 1.25, M10 x 1.5, M11 x 1.5, M12 x 1.5, M12 x 1.75, 1/8”-28BSP, Tap Wrench, T-Handle Tap Wrench, Die Holder, Metric Thread Gauge, Screwdriver.
Nett Weight	2.1kg

Model No	AK3037
Brand	Sealey
Contents	Taper/Plug Taps & Dies; 3 x 0.5, 3.5 x 0.6, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75, Steel Die Holder, Tap Wrench, T-Bar Tap Wrench, HSS Drill Bits; 2.5, 2.9, 3.3, 4.2, 5, 6.8, 8.5, 10.3mm, Screwdriver, Thread Gauge
Nett Weight	1.82kg

Model No	AK3033
Brand	Sealey
Contents	Taps & Dies; 3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75, UNF 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, BSP 1/8"-28, 1/4"-19, Tap Wrench, T-Bar Tap Wrench, Die Holder, Thread Gauge, Screwdriver
Nett Weight	1.8kg

Model No	AK3040
Brand	Sealey
Contents	Taps & Dies; 3 x 0.5, 3 x 0.6, 4 x 0.7, 4 x 0.75, 5 x 0.8, 5 x 0.9, 6 x 0.75, 6 x 1, 7 x 0.75, 7 x 1, 8 x 1, 8 x 1.25, 10 x 1.25, 10 x 1.5, 12 x 1.5, 12 x 1.75mm, 1/8"NPT, Tap Wrench, T-Bar Tap Wrench, Die Holder, Screwdriver, Thread Gauge
Nett Weight	1.9kg

Model No	AK3015HSS
Brand	Sealey
Contents	Taps (Taper, Second, Plug) & Dies; 3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75mm, Tap Wrench, Die Holder, Thread Gauge, Screwdriver
Nett Weight	1.36kg

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Bar type or ratchet tap wrench?

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Is pipe threading different?

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