HMMWV Airlift Bumper Parts needed for A1 / A2

Here are the part numbers and NSN’s needed to mount the Airlift bumper on the HMMWV.

Many if not all of the parts are technically interchangeable between the A1 and the A2.

Pictured Part Name M998 / M998A1 M998A2 H1 Civilian / Other Quantity Needed
4 (Outer*) Bumper Brace Assembly NSN: 2540012573877 PN: 12339186 NSN: 2540012573877 PN: 12339186 2
3 (Inner*) Bumper Brace Assembly NSN: 5340011964720 PN: 12340019 NSN: 2540013957999 PN: 12342960 PN: 6003807 2
7 Bumper NSN: 2540014112733 PN: 12446973
NSN: 2540011964920 PN: 5578355
NSN: 2540011964920 PN: 12338218
NSN: 2540011964920 PN: 12469405 1
Mounting Plate NSN: 5340014987964 PN: 12469169 ** 1
15 Outer Bracket (Left Hand) NSN: 2540011964721 PN: 12338202-1
NSN: 5340011964721 PN: 12338202-1
NSN: 5340014088523 PN: 12446989 1
15 Outer Bracket (Right Hand) NSN: 2540011964722 PN: 12338202-2 NSN: 5340014088529 PN: 12446990 1
20 Spacer Plate NSN: 5340012055377 PN: 12338164 4
21 Inner Bracket/Support NSN: 2540011964723 PN: 12338194 NSN: 2541014864915 PN: 12446991-3 2
* The inner and outer braces are reversed for the M1152A1 (Possibly other models as well.)
** Only vehicles that have been retrofitted with MWO 9-2320-280-20-6 Airlift Bumper Reinforcement, or MWO 9-2320-280-20-7 Crossmember Reinforcement, are authorized to tow M1101 and M1102 trailers. 
*** Gussets were added to 12446989 / 12446990.

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