Grenade, Incendiary, M14 : another type of chemical grenade for special use. Specially requested by Army and Corps of Engineers, for possible destruction of enemy material or own usable equipment in danger of being captured . Introduced in 1943, the grenade contains an incendiary filling (TH2 or Thermate 8-2) which burns intensely, i.e. it develops heat up to 4,330°F welding

 (1)           Grenade, Incendiary, M14 = igniting fuze M200A1 – Thermate filler – tinplate smooth cylindrical body – not thrown –                   delay time 2 seconds – blue-gray color with INCEN, TH, ½” lower band, all in purple color – incendiary use - approx. use 1943-                   1945

Remarks: standardized both by Army and Navy, whereby nomenclature changed into Grenade, Incendiary, AN-M14 . TH is an incendiary material composed of Thermit and other ingredients which, upon ignition, develops a very high temperature, this helps to melt together movable metal parts, and helps burn items which are difficult to ignite ! A clamp of strap metal with a single nail were provided with each grenade, into which the latter could be placed to keep it from rolling when it ignites (fix grenade to clamp, upside down) . Production started August 1, 1943 and already stopped December 31, 1943 ! Total WWII production reached over 7,500,000 units !


Fiber Containers M41 & M41A1 (for MKII Frag Hand Grenades)
Fiber Containers M42A1 (for M14 Incendiary Grenades)
M15 WP Smoke Hand Grenade
MKIIA1 Frag Hand Grenade
M14 Incendiary Grenade

Grenade, Frangible, M1 : developed in 1941 by the C.W.S.aka “Molotov Cocktail” and standardized in September 1942 . This was a common glass one pint bottle equipped with a screw cap and designed for various chemical fillings meant for incendiary purposes . Dispersal of contents takes place when the bottle is shattered by impact (so no bursting charge is necessary) . The incendiary fillings are ignited by M1, M2 or M3 igniters immediately after impact . Various chemical fillers are provided . Main characteristics are as follows :

 (1)            Grenade, Frangible, M1 = no fuze – CNS filler – glass body – 25 yards range – ignites on impact – harassing use -                   approx. use 1942-1943

 (2)            Grenade, Frangible, M1 = no fuze – AW filler – glass body – 25 yards range – ignites on impact – incendiary use, casualty                   use - approx. 1942-1943

 (3)            Grenade, Frangible, M1 = no fuze - FS filler - glass body - 25 yards range - ignites on impact - casualty, screening use                   - approx. use 1942-1944

 (4)             Grenade, Frangible, M1 = M1 igniter – Alcohol, Gasoline filler – glass body – 25 yards range – ignites on impact –                    incendiary use - approx. use 1942-1943

 (5)             Grenade, Frangible, M1 = M2 igniter – GA filler – glass body – 25 yards range – ignites on impact – incendiary use -                    approx. use 1942-1943

 (6)             Grenade, Frangible, M1 = no fuze – AC filler – glass body – 25 yards range – ignites on impact – casualty use -                    approx. use 1942-1944

 (7)             Grenade, Frangible, M1 = M3 igniter – IM filler – glass body – 25 yards range – ignites on impact – incendiary use -                    approx. use 1943-1945

 (8)             Grenade, Frangible, M1 = M3 igniter – NP filler – glass body – 25 yards range – ignites on impact – incendiary use -                    approx. use 1943-1945

Remarks : the Frangible Grenades used various types of chemical and other fillers such as M1 (Lewisite), also called B Chlorvinyldichlorarsine, a liquid which gradually changes to a gas; extremely vesicant it burns the skin or lungs severely, particularly suitable for contaminating vehicles and important installations . CNS is a mixture of CN in Chlorpicrin and Chloroform, it is called a Chloracetophenone solution which has lachrimatory properties . AW filling consists of Phosphorus mixed with a Rubber-Gasoline solution which adheres to surfaces while burning, its Phosphorus content prevents the solution from being extinguished with water ! FS Filler or Sulphur Trioxide Chlorsulfonic Acid mixture is a corrosive liquid which reacts with the atmosphere, producing a very effective screening smoke . The next grenade is filled with a 15 oz. Mixture of Alcohol & Gasoline (improved cocktail) and is equipped with an added M1 igniter (containing a special powder which, when coming in contact with the liquid, ignites it spontaneously) . The GA filler consists of liquid or solidified Gasoline which is an effective incendiary material; the grenade was also provided with a M2 igniter i.e. a powder-filled paper cartridge actuated by a pull wire fuze lighter (pull wire lighter and throw grenade) . Another filling is AC which is a deadly colorless liquid (Hydrocyanic Acid) which vaporizes into a clear gas; since it is a powerful nerve poison it first causes dizziness, headache and a rush of blood to the head, resulting in brutal death within 15 minutes . IM filling, a thickened incendiary mixture adhering to smooth surfaces, used a M3 igniter (consisting of a fuze body, a blank cal .38 cartridge, and a striker, all fastened around the glass bottle with a Timmerman strap) . Finally, the NP filler or Napalm Incendiary was one of the newest available incendiary mixtures, also combined with a M3 igniter . M1 Frangible Grenades bear no markings, and are simply packed in cheap cardboard merely indicating that contents are chemical substances, plus basic operating instructions … one great advantage – these types of grenades were cheap to manufacture, and improvisation in the field was very simple.

Notes: markings on detonating fuzes were normally stamped onto the metal, but also frequently stenciled in black – grenades were usually packed one per fiber container (laminated asphalt-impregnated fiber with metal top and end, 2 types of containers used for Hand Grenades), which was then sealed with a strip of adhesive tape with data related to grenade type and model, subject containers were then packed in standard wooden boxes (std. capacity 25 per box)- a new M204A1 detonating fuze, silent type (T-lug), though already developed late war, was only standardized after WWII - in order to be complete following Hand Grenades were equally used (restricted use/late war introduction) i.e. Grenade, Hand, Fragmentation, T13 (requested by OSS, introduced 1943 and cancelled Jun 1945); Grenade, Hand, Riot, CN, M25 (requested by PMG for riot control, developed 1943, with integral fuze, standardized Feb 1945, painted black); Grenade, Illuminating, MK II (requested by USMC, introduced late 1944, lighting power 60,000 candles, accepted by US Army 1950, black or unpainted); Grenade, Hand, Training, MkIA1 (ex-WWI dummy grenade, re-introduced 1942, painted black with narrow white band); Grenade, Hand, Practice, M21 (ex-WWI practice grenade, re-introduced 1945, equipped with igniting fuze M10A2/M10A3 21 oz. black powder, painted l. blue) .


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