SECO Parts and Equipment — U.S. stocking supplier since 1951 · CAGE 1JUW8 · 3000 Mike Padgett Hwy, Augusta, GA 30906 706-798-7500 sales@secoglobal.com secoparts.net ↗

NSN catalog · 90,857 parts Quote list Online store ↗

Catalog › Parts manuals › TM 9-2320-280-24P › Exhaust System › Fig. 23

HMMWV Muffler, Exhaust Pipes, and Related Parts TM 9-2320-280-24P · Fig. 23

Every part in figure 23 of TM 9-2320-280-24P (HMMWV M998 series (A0, A1 and A2) repair parts), group 04 Exhaust System: 23 lines, 22 on our own shelf in Augusta, GA. The rest we source — select what you need and send one quote request, answered within one business day.

TM 9-2320-280-24P figure 23, Muffler, Exhaust Pipes, and Related Parts: exploded drawing with item numbers

Drawing from TM 9-2320-280-24P, approved for public release. Open it full size to zoom.

Your truck

Item	Part	Qty	On our shelf
1	Cap Hexagon Head Screw NSN 5305-00-782-9489 · P/N B1821BH038C200N SCREW,CAP,HEXAGON H 3/8-16 X 2.00 Fits: All A0 and A1 models, plus M1121	9	365 in stock
2	Flat Washer NSN 5310-00-080-6004 · P/N MS27183-14 WASHER,FLAT 3/8 Fits: All A0 and A1 models, plus M1121	50	1,146 in stock $7.83our price Buy online ↗
3	Manifold Seal Assy NSN 5330-01-189-9738 · P/N 12338342 SEAL ASSY,MANIFOLD Fits: All A0 and A1 models, plus M1121	2	66 in stock $25–$60 per assemblytypical
4	Self-Locking Hexagon Nut NSN 5310-00-935-9021 · P/N MS51943-35 NUT,SELF-LOCKING,HE 3/8-16 Fits: All A0 and A1 models, plus M1121	28	219 in stock
5	Exhaust Pipe NSN 2990-01-187-7168 · P/N 12338351 PIPE,EXHAUST Fits: All A0 and A1 models, plus M1121	1	1 in stock $1,100.00our price Buy online ↗
6	Loop Clamp NSN 5340-01-212-3553 · P/N 12338343-1 CLAMP,LOOP Fits: All A0 and A1 models, plus M1121	2	16 in stock $20.57our price Buy online ↗
7	Exhaust Muffler NSN 2990-01-188-3281 · P/N 23244A MUFFLER,EXHAUST Fits: All A0 and A1 models, plus M1121	1	6 in stock $765.83 per eachgov't list price
8	Cap Hexagon Head Screw NSN 5305-00-543-2419 · P/N B1821BH038C113N SCREW,CAP,HEXAGON H 3/8-16 X 1.125 Fits: All A0 and A1 models, plus M1121	10	1,168 in stock
9	Retaining Strap NSN 5340-01-212-4887 · P/N 5588675 STRAP,RETAINING Fits: All A0 and A1 models, plus M1121	6	772 in stock $14.70our price Buy online ↗
10	Engine Exhaust System Hanger NSN 2990-01-187-7030 · P/N 12338221 HANGER,ENGINE EXHAU Fits: All A0 and A1 models, plus M1121	1	1 in stock $65–$115 eachtypical
11	Vehicular Insulation NSN 2540-01-309-4459 · P/N 5588778 INSULATION,THERMAL, Fits: All A0 and A1 models, plus M1121	2	21 in stock
12	Retaining Strap NSN 5340-01-211-4025 · P/N 5590387 STRAP,RETAINING Fits: All A0 and A1 models, plus M1121	1	3 in stock $55–$105 eachtypical
13	Gasket NSN 5330-01-200-0466 · P/N 12338339 GASKET Fits: All A0 and A1 models, plus M1121	2	73 in stock $25–$40 eachtypical
14	Cap Hexagon Head Screw NSN 5305-00-782-9489 · P/N B1821BH038C200N SCREW,CAP,HEXAGON H 3/8-16 X 2.00 Fits: All A0 and A1 models, plus M1121	3	365 in stock
15	Exhaust Pipe NSN 2990-01-190-1089 · P/N 12338350 PIPE,EXHAUST Fits: All A0 and A1 models, plus M1121	1	18 in stock $183.72 per eachgov't list price
16	Engine Exhaust System Hanger NSN 2990-01-211-8587 · P/N 12338346 HANGER,ENGINE EXHAU Fits: All A0 and A1 models, plus M1121	1	10 in stock $45–$90 eachtypical
17	Lock Washer NSN 5310-00-637-9541 · P/N MS35338-46 WASHER,LOCK 3/8 Fits: All A0 and A1 models, plus M1121	2	1,162 in stock
18	Cap Hexagon Head Screw NSN 5305-00-068-0510 · P/N B1821BH038C100N SCREW,CAP,HEXAGON H 3/8-16 X 1.00 Fits: All A0 and A1 models, plus M1121	2	26 in stock
19	Nonmetallic Grommet NSN 5325-01-187-1604 · P/N 12338338 GROMMET,NONMETALLIC Fits: All A0 and A1 models, plus M1121	2	1 in stock
20	Angle Bracket NSN 5340-01-211-3137 · P/N 12338340 BRACKET,ANGLE Fits: All A0 and A1 models, plus M1121	1	We can source it $75–$125 eachtypical
21	Flat Washer NSN 5310-01-412-4013 · P/N 2436163 WASHER,FLAT #10 Fits: All A0 and A1 models, plus M1121	2	6 in stock
22	Nut NSN 5310-01-143-0512 · P/N 29520052 NUT #10-15 Fits: All A0 and A1 models, plus M1121	2	8 in stock
23	Cap Hexagon Head Screw NSN 5306-00-821-3869 · P/N B1821BH038C175N SCREW,CAP,HEXAGON H 3/8-16 X 1.75 Fits: All A0 and A1 models, plus M1121	2	201 in stock $14.70our price Buy online ↗

Buy the 5 in-stock parts on our store ↗

Qty is how many the assembly uses, as the manual lists it. Our price is our online store's price: Buy online opens that part on secoparts.net for card checkout. Typical is an estimate from the government catalog price and what we have charged for similar parts — not a quote. Gov't list price is the government catalog (FEDLOG) price, a public reference, not ours. "Fits" comes from the manual's usable-on codes; a line without codes applies to every model.