Bomb Fuzes M904-
As is, Where is
bomb fuzes m904 - m905
From New manufacture
M904 Nose fuze
M904 is a mechanical action nose fuze designed for
use with all types of General Purpose (GP) low and
high drag bombs Mk80 series.
The fuze is armed by air pressure causing the arming
vanes to rotate. Minimum airspeed of approximately
150 knots is required for arming. Arming delay time
is marked in 2 s intervals from 6 to 18 sec. On
impact a firing delay time is provided by delay
element M9. An adaptor is required to accommodate
the 2 inch fuze thread in the larger fuze wells of
the Mk80. This fuze may be used for impact and
impact-delay application in conjunction with tail
A safety wire inserted in the fuze prevents the
arming vane from rotating. A red tag, attached to
the safety wire inserted in the fuze states that a
white stripe must be visible through the inspection
window at the 6 and 18 second arming setting.
An inspection window in the thumb grip just above
the rotor cavity shows the rotor after it moves into
the armed position. The window in the body will show
red if the striker body has moved into the firing
position. Either condition indicates an armed fuze.
In unarmed condition, the rotor is out of line with
the rest of the explosive train. The delay or non
delay element is not inserted in the fuze until it
is ito be used. The empty delay element cavity acts
as an interruptor to the explosive train during
handling, transporting and storage.
One (1) M904 Tail Fuze packed complete with coupler
drive and vane arming assembly without non delay or
delay elements sealed in tubular containers. 8
Tubular containers sealed under vacuum in plastic
Ten (10) Delay Elements in tubular containers sealed
under vacuum in wooden boxes. Four Hundred (400)
elements per wooden box.
Ten (10) Non Delay Elements sealed in tubular
containers sealed under vacuum in wooden boxes. Four
Hundred (400) elements per wooden box. Other packing
options are available upon customer request.
2 in (50.8 mm)
Lead Azide 266 mg and Tetryl 200 mg
-40o C to 70o C
6 to 18 s, in
intervals: 6, 8, 10, 12, 14, 16,18 s
Delay Elements: 0.010, 0.025, 0.050, 0.100, 0.250 s
2 Inspection Peep
600 KTAS air
speed max, 60000 ft altitude max
200 - 600 KTAS
air speed, 500 - 50000 ft altitude
M905 Tail fuze
The fuze has a selective arming time delay of 4
to 20 s, marked in 2 s intervals from 4 to 8 s
and in 4 s intervals from 8 to 20 seconds. The
striker is activated by inertia instead of
Arming is effected by the vane arming assembly
M772 through the rotation action of the flexible
drive connected to the coupler drive assembly
which reduces the high revolutions of the arming
drive to a constant speed output of
approximately 1800 revolutions per minute. The
coupler drive assembly accepts the torque from
the flexible drive shaft and transmits it to the
attached tail fuze.
The fuze is made up of two main assemblies, the
input drive housing assembly and the fuze body
This fuze may be used for impact and impact-delay
application in conjuction with nose fuze M904
and forms the tail component of the fuzing
system for unguided and guided bombs.
A safety pin prevents the vanes of the arming
drive assembly from rotating. An instruction
label attached to a red tag and safety pin
states that after the arming wire has been
inserted in the drive assembly the safety pin is
to be removed, and replaced if the bomb is not
dropped. The safety features of the fuze are the
same as for the nose fuze M904 except that a
white stripe appears in the large inspection
windows at all arming delay settings.
Specification and photos are not contractual and
are subject to verification upon inspection
PLEASE BE ADVISED THAT INFORMATION INCLUDED IS CONFIDENTIAL IN NATURE AND IS
BASED ON PRE-EXISTING BUSINESS RELATIONSHIP WITH THE LEGAL OWNER OF PROPERTY
DESCRIBED HEREIN (IF APPLICABLE). AS SUCH, UPON RECEIPT OF SAID INFORMATION
THE RECEIVER ACKNOWLEDGES THAT ANY UNAUTHORIZED CONTACT WITH SAID LEGAL
SELLER WILL BE CHARACTERIZED AS A BREACH OF CONFIDENTIALITY AND SAID
AGREEMENT MAY BE ENFORCED UNDER EXISTING LAW OR IN EQUITY.
This paper was
prepared by General Equipment Inc.
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content and ideas of this paper are the property of General Equipment Inc.
may include information on International Traffic in Arms
Regulation (ITAR) (22 CFR-120-130) controlled items.
These controlled items may not be resold, diverted,
transferred or transshipped outside of the United States or to any other
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