PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A657Bracket,support,muffler

Am General Llc · NSN 2990-00-737-1044 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-737-1044 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-737-1044. Primary manufacturer part number: A657.
Features
  • Bracket,support,muffler — FSC 2990
  • General Characteristics Item Description: STEEL,AISI C 1012,SPECIAL SHAPE,1 IN.W O/A,2.625 IN.LG I/A,1 HOLE 0.343 IN. DIA,CENTERED 2.000 IN.FROM END IN
  • 4 verified cross-references
  • Primary manufacturer: Am General Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Bracket,support,muffler, cataloged under National Stock Number 2990-00-737-1044, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Am General Llc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-00-737-1044
Primary Part NumberA657
Item NameBracket,support,muffler
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerAm General Llc
StatusACTIVE
General Characteristics Item DescriptionSTEEL,AISI C 1012,SPECIAL SHAPE,1 IN.W O/A,2.625 IN.LG I/A,1 HOLE 0.343 IN. DIA,CENTERED 2.000 IN.FROM END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5360-00-312-6199A657 INTERCHANGEABLE
Spring,helical,compression
Crane Co Div Valve Div
2805-00-752-01663688065 INTERCHANGEABLE
Valve,poppet,engine
General Motors Corp
Cross-Reference Index
Part NumberManufacturer
A657 Jeep Corp (USA)
A657 PRIMARY Am General Llc (USA)
GPW5262 Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
GPW5262 Ford Motor Company (USA)
Related Parts
5360-00-312-6199INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
A657
2805-00-752-0166INTERCHANGEABLE
VALVE,POPPET,ENGINE
3688065

Frequently Asked Questions

What is NSN 2990-00-737-1044?

NSN 2990-00-737-1044 is a Bracket,support,muffler, manufactured by Am General Llc, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-00-737-1044?

NSN 2990-00-737-1044 has 4 cross-referenced part numbers: A657 (Jeep Corp), A657 (Am General Llc), GPW5262 (Ford Motor Co Ford Parts and Service Div Government Part Sales), GPW5262 (Ford Motor Company).

What NSN replaces 2990-00-737-1044?

There are 2 known substitutes for 2990-00-737-1044: 5360-00-312-6199, 2805-00-752-0166. Verify interchangeability with system specifications before substitution.

What are the specifications of A657?

Key specifications for A657: General Characteristics Item Description: STEEL,AISI C 1012,SPECIAL SHAPE,1 IN.W O/A,2.625 IN.LG I/A,1 HOLE 0.343 IN. DIA,CENTERED 2.000 IN.FROM END IN. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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