U25A Stop Countersinks

In stock

SKU

U25A

Stop countersinks 100°
for American-pattern cages. 

Integral pilot.                  Three flutes.                               M42 8% Cobalt HSS.               1/4-28 UN threaded mount. 
100° included angle       Concentrically relief ground.                                        (3/8-24 UN for body diameters >5/8")

Grouped product items
Product Name	Diameter Inch	Pilot diameter	Thread UN	Equivalent Numbers Martin*	Equivalent Numbers Zephyr*	Qty
U25A MM305-1 x 1/4 Stop Countersink Special Price £15.06 Regular Price £21.51 - 38 in stock	-	-	-	-	-
U25A MM305-2 x N27 Stop Countersink £18.90 - 36 in stock	-	-	-	-	-
U25A MM305-1 x 3/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 1 in stock	3/8	3/32	1/4 -28	MM305A-1	ZT170-22
U25A MM305-1 x 1/8 Stop Countersink Special Price £7.70 Regular Price £11.00 - 23 in stock	3/8	1/8	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x 5/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 17 in stock	3/8	5/32	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x 3/16 Stop Countersink Special Price £7.70 Regular Price £11.00 - 6 in stock	3/8	3/16	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x N40 Stop Countersink Special Price £7.70 Regular Price £11.00 - 15 in stock	3/8	#40	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x N30 Stop Countersink Special Price £7.70 Regular Price £11.00 - 49 in stock	3/8	#30	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x N21 Stop Countersink Special Price £7.70 Regular Price £11.00 - 12 in stock	3/8	#21	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-1 x N10 Stop Countersink Special Price £7.70 Regular Price £11.00 - 10 in stock	3/8	#10	1/4 -28	(MM305-1)	(ZT154-22)
U25A MM305-2 x 3/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - Out of stock	7/16	3/32	1/4 -28	MM305A-2	ZT170-26	Out of stock
U25A MM305-2 x 1/8 Stop Countersink Special Price £7.70 Regular Price £11.00 - 23 in stock	7/16	1/8	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x 5/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 58 in stock	7/16	5/32	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x 3/16 Stop Countersink Special Price £7.70 Regular Price £11.00 - 59 in stock	7/16	3/16	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x 7/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 1 in stock	7/16	7/32	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x N40 Stop Countersink Special Price £7.70 Regular Price £11.00 - 33 in stock	7/16	#40	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x N30 Stop Countersink Special Price £7.70 Regular Price £11.00 - 31 in stock	7/16	#30	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x N21 Stop Countersink Special Price £7.70 Regular Price £11.00 - 33 in stock	7/16	#21	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-2 x N10 Stop Countersink Special Price £7.70 Regular Price £11.00 - 3 in stock	7/16	#10	1/4 -28	(MM305-2)	(ZT154-26)
U25A MM305-3 x 3/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - Out of stock	1/2	3/32	1/4 -28	MM305A-3	ZT170-30	Out of stock
U25A MM305-3 x 1/8 Stop Countersink Special Price £7.70 Regular Price £11.00 - Out of stock	1/2	1/8	1/4 -28	(MM305-3)	(ZT154-30)	Out of stock
U25A MM305-3 x 5/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 7 in stock	1/2	5/32	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x 3/16 Stop Countersink Special Price £7.70 Regular Price £11.00 - 11 in stock	1/2	3/16	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x 7/32 Stop Countersink Special Price £7.70 Regular Price £11.00 - 6 in stock	1/2	7/32	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x 1/4 Stop Countersink Special Price £7.70 Regular Price £11.00 - 9 in stock	1/2	1/4	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x N40 Stop Countersink Special Price £7.70 Regular Price £11.00 - 3 in stock	1/2	#40	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x N30 Stop Countersink Special Price £10.84 Regular Price £15.48 - 10 in stock	1/2	#30	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-3 x N21 Stop Countersink Special Price £10.84 Regular Price £15.48 - 1 in stock	1/2	#21	1/4 -28	(MM305-3)	(ZT154-30)
U25A MM305-4 x 5/16 Stop Countersink Special Price £15.39 Regular Price £21.99 - Out of stock	5/8	5/16	1/4 -28	(MM305-4)	(ZT154-49)	Out of stock

Details

*Code numbers in brackets are the makers' numbers for the same tool in 2 FLUTE configuration, 
which is sometimes advised for free-cutting aluminium work. The 3 FLUTE tools we offer have 
excellent performance on steels, including tough stainless, and titanium but are also well suited
 to most aerospace light alloys, and therefore we do not currently stock 2-Flute pattern. However, 
the two flute type, if insisted, may be provided on demand. 

We can provide to special order tools with 
- Non-standard pilot diameters ·    - Carbide tips 
- 82° 90° 110° and 120° included angles

More Information

More Information
Pilot diameter	3/32
Thread UN	1/4-28
Equivalent Numbers Martin*	MM305A-0
Equivalent Numbers Zephyr*	ZT170-12