Exhaust Muffler P/N T-5557

Specifications

Outlet location

Centered on End of Body First Outlet

Outlet projection length

First Outlet Inches Nominal 5.750

Inlet inside diameter

Single Inlet Inches Nominal 2.525

Outlet connection type

First Outlet Unthreaded

Operating position

Universal

Inlet location

Located on Side of Body Single Inlet

Overall length

24.000 in (nominal)

Inlet connection type

Single Inlet Unthreaded

Overall diameter

4.625 in (nominal)

Design type

Dry

Coolant type

Air

Muffler design

Straight Through W/baffle

Baffle quantity

1

Body shape

Round

Outlet outside diameter

First Outlet Inches Nominal 2.500

Material

Location Not Otherwise Specified Steel

Surface treatment

Aluminum

From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.

Cross-reference part numbers

T-5557 ABT5557 711615

Also referenced as

5557

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual. They find the item; confirm the current part number when you order.

Shown for identification only. SECO can quote against any of these numbers.

Logistics data

Source of supply	SMS DLA Land and Maritime, Columbus, Ohio
Acquisition advice code	J Not stocked, centrally procured — the government does not stock this item; it is procured only when a requisition arrives. SECO has 2 on the shelf
Unit of issue	EA each
Demilitarization code	A Demilitarization not required — non-munitions-list item
Controlled inventory code	U Unclassified
Hazardous material indicator	N No hazardous material

Source: public FLIS/PUB LOG cataloging data.

Why buy from SECO

These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.

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FAQ

What is NSN 2990-00-983-4230?
NSN 2990-00-983-4230 (2990009834230) — Exhaust Muffler: SECO Parts has 2 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for exhaust muffler in federal supply class 2990 (Miscellaneous Engine Accessories, Nonaircraft).

Is NSN 2990-00-983-4230 available?
SECO Parts has 2 in stock in Augusta, GA — order or request a quote below.

How much does NSN 2990-00-983-4230 cost?
SECO typically prices parts like NSN 2990-00-983-4230 at $30–$60 each: an estimate from the government catalog price and what SECO has charged for similar parts. It is not a quote — request one for your price, usually answered the same business day. Quote lines carry a $50 minimum.

What part numbers cross-reference to NSN 2990-00-983-4230?
Part numbers that cross-reference this NSN include T-5557, ABT5557, 711615. It is also referenced by older, superseded or advisory numbers: 5557. SECO can quote against any of them.