NSN 2990-00-991-3657 101901, 21028, 3816360

2990-00-991-3657 00020215600030Airframe Structural Components29900045Miscellaneous Engine Accessories, Nonaircraft

Part Alternates: 101901, 21028, 3816360, 3865285, 3981940, 710, 2990-00-991-3657, 00-991-3657, 2990009913657, 009913657

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
29	01 JAN 1962	00-991-3657	10849 ( MUFFLER, EXHAUST )

Part Number	Request Date	QTY	Origin	SBA
2990-00-991-3657	2015-06-180	3	DIBBS

Part Number	Cage Code	Manufacturer
101901	89799	ARVIN INDUSTRIES INC
21028	79260	WALKER MFG CO
3816360	11862	GENERAL MOTORS CORP CHEVROLET MOTOR DIV
3816360	24617	GENERAL MOTORS CORP
3816360	7X677	GENERAL MOTORS LLC DBA GENERAL MOTORS
3816360	93210	CLARK RADIO EQUIPMENT CO
3865285	11862	GENERAL MOTORS CORP CHEVROLET MOTOR DIV
3865285	24617	GENERAL MOTORS CORP
3865285	93219	TRUCK AND BUS GROUP FLINT TRUCK ASSEMBLY PLANT
3981940	11862	GENERAL MOTORS CORP CHEVROLET MOTOR DIV
710	74080	HARVARD INDUSTRIES

Thank you very much for the excellent service and professional customer care.

Ernie G. Honeywell

The service was excellent. I can think of no improvements to date that you can make regarding internet sales.

John L. Raytheon

The representative for WBParts was efficient & handled our request in a timely & professional manner.

Karen G. General Dynamics

Tried two other sources, neither of them responded, was all done online, never spoke to anyone.

Rex S. US Airforce

The response is quick and the price is often very good. We are completely satisfied.

Patricia S. NASA

NSNs for Compare ( up to 4 ): Add 2990-00-991-3657

Compare

2990-00-991-4371, 2990-00-991-6525, 2990-00-991-6780, 2990-00-991-8418, 2990-00-992-0405

Characteristic	Specifications
MATERIAL	STEEL
SURFACE TREATMENT	ZINC COATED
DESIGN TYPE	DRY
COOLANT TYPE	AIR
MUFFLER DESIGN	STRAIGHT THROUGH
BODY SHAPE	ROUND
OVERALL LENGTH	26.500 INCHES NOMINAL
OVERALL DIAMETER	5.000 INCHES NOMINAL
OPERATING POSITION	HORIZONTAL
INLET CONNECTION TYPE	UNTHREADED
INLET LOCATION	LOCATED @IN CENTER OF END SECTION
INLET PROJECTION LENGTH	2.250 INCHES NOMINAL
INLET OUTSIDE DIAMETER	2.125 INCHES NOMINAL
INLET INSIDE DIAMETER	2.000 INCHES NOMINAL
OUTLET CONNECTION TYPE	UNTHREADED
OUTLET LOCATION	LOCATED IN CENTER OF END SECTION OPPOSITE INLET
OUTLET PROJECTION LENGTH	2.250 INCHES NOMINAL
OUTLET OUTSIDE DIAMETER	1.812 INCHES NOMINAL
OUTLET INSIDE DIAMETER	1.687 INCHES NOMINAL

Category	Code	Description
Shelf-Life Code:	0	Nondeteriorative
Hazardous Material Indicator Code	N	There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:	A	Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:	U	UNCLASSIFIED
Precious Metals Indicator Code:	U	Precious metal type is unknown
Criticality Code:	X	The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Category	Code	Description
NMF Description	125850	MUFFLER/EXHAUST SYS/PIPE/ETC
Less than car load rating
Less than truck load rating	W	Rating Variable
Water commodity Code	593	unknown
Originating Activity Code	XX
Air Dimension Code	A	Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity	V	Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling	Z	No special handling required.
Special Handling Code	9	unknonwn
HAZMAT
Type of Cargo	Z	No special type of cargo code applicable

Category	Code	Description
Materiel Category and Inventory Manager	J	Ground Forces Support Materiel (DLA/GSA Items)
Appropriation and Budget Activity	2	Stock Fund Secondary Items
Management Inventory Segment	2	NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable.
Specific Group/Generic Code	0	Medical Materiel
Weapons Systems/End Item or Homogeneous Group	00	DLA/GSA-Managed Items that cannot be identified to a specific Army Weapons Systems/End Item
Accounting Requirements Code	X	Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items.
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DA	Department of the Army
Service Organization	A	U.S. Army
Reparability	Z	This is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item.
Acquisition Advice Codes	J	NOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each

Category	Code	Description
Stores Account Code	1	Marine Corps Stock Fund Account Item.
Combat Essentiality Code	5	Critical Repair Part to a Combat Essential End Item. Those parts or components whose failure in a combat essential end item will render the end item inoperative or reduce its effectiveness below the minimum acceptable level of efficiency.
Materiel Management Code	B	All CommoditiesDefense Logistics Agency, (DLA,)
Echelon Management Code	2	ICP/DSSC Marine Corps-managed Recoverability Code D items and Defense Logistics Agency (DLA)/TACOM/GSA) items which the integrated manager has not decontrolled.
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DM	U.S. Marine Corps
Service Organization	M	U.S. Marine Corps
Reparability	Z	Nonreparable item. When unserviceable, condemn and dispose at the level indicated by the first digit of the maintenance code.
Acquisition Advice Codes	V	TERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each

Category	Code	Description
Cognizance Codes	9B	Navy-owned stocks of DLA material Naval Inventory Control Point, Mechanicsburg
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DN	Department of the Navy
Service Organization	N	U.S. Navy
Acquisition Advice Codes	V	TERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	Z EA : Each