PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40398Pipe,exhaust

Walker Mfg Co · NSN 2990-01-251-7787 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-251-7787 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-251-7787. Primary manufacturer part number: 40398.
Features
  • Pipe,exhaust — FSC 2990
  • Usage Location: EXHAUST PIPE
  • End Item Model Number: BLAZER,1978-80 SERIES
  • Design Form: PREBENT
  • End Item Source: 11862
  • End Item Name: LIGHT DUTY TRUCK
  • 3 verified cross-references
  • Primary manufacturer: Walker Mfg Co
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Pipe,exhaust, cataloged under National Stock Number 2990-01-251-7787, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Walker Mfg Co. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-01-251-7787
Primary Part Number40398
Item NamePipe,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerWalker Mfg Co
StatusACTIVE
Usage LocationEXHAUST PIPE
End Item Model NumberBLAZER,1978-80 SERIES
Design FormPREBENT
End Item Source11862
End Item NameLIGHT DUTY TRUCK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5330-00-183-591842804 INTERCHANGEABLE
Seal,fuel System
Liquid Controls, L.l.c. Div Idex Corporation
3020-00-249-6742 INTERCHANGEABLE
Gear,spur
5330-00-285-838113696A INTERCHANGEABLE
Seal,plain Encased
Brinkley Technology Group Llc Dba Hercules Manufacturing
3110-01-442-6174145DS018-2 INTERCHANGEABLE
Bearing,roller,cylindrical
The Boeing Company
Cross-Reference Index
Part NumberManufacturer
464742 General Motors Corp Chevrolet Motor Div Special Products Dept (USA)
40398 PRIMARY Walker Mfg Co (USA)
464742 General Motors Llc Dba General Motors Llc (USA)
Related Parts
5330-00-183-5918INTERCHANGEABLE
SEAL,FUEL SYSTEM
42804
3020-00-249-6742INTERCHANGEABLE
GEAR,SPUR
5330-00-285-8381INTERCHANGEABLE
SEAL,PLAIN ENCASED
13696A
3110-01-442-6174INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
145DS018-2

Frequently Asked Questions

What is NSN 2990-01-251-7787?

NSN 2990-01-251-7787 is a Pipe,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-251-7787?

NSN 2990-01-251-7787 has 3 cross-referenced part numbers: 464742 (General Motors Corp Chevrolet Motor Div Special Products Dept), 40398 (Walker Mfg Co), 464742 (General Motors Llc Dba General Motors Llc).

What NSN replaces 2990-01-251-7787?

There are 4 known substitutes for 2990-01-251-7787: 5330-00-183-5918, 3020-00-249-6742, 5330-00-285-8381 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40398?

Key specifications for 40398: Usage Location: EXHAUST PIPE; End Item Model Number: BLAZER,1978-80 SERIES; Design Form: PREBENT; End Item Source: 11862. 5 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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