PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9859-4Pipe,exhaust

Walker Mfg Co · NSN 2990-00-491-9598 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-491-9598 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-491-9598. Primary manufacturer part number: 9859-4.
Features
  • Pipe,exhaust — FSC 2990
  • Material: STEEL
  • Design Form: STRAIGHT
  • Nominal Outside Diameter: 2.000 INCHES IN
  • Nominal Overall Length: 80.250 INCHES IN
  • 9 verified cross-references
  • Primary manufacturer: Walker Mfg Co
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel construction
General Description

The Pipe,exhaust, cataloged under National Stock Number 2990-00-491-9598, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-00-491-9598
Primary Part Number9859-4
Item NamePipe,exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerWalker Mfg Co
StatusACTIVE
MaterialSTEEL
Design FormSTRAIGHT
Nominal Outside Diameter2.000 INCHES IN
Nominal Overall Length80.250 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5315-00-054-40956L3904-11-1 INTERCHANGEABLE
Pin,tapered,plain
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3455-00-243-9487A814-45L INTERCHANGEABLE
Cutter,milling,angle
F & D Tool Co Inc
5340-00-251-8341S04706-003 INTERCHANGEABLE
Strap,retaining
B.w. Elliott Manufacturing Co., Llc
5360-01-004-025847063 INTERCHANGEABLE
Spring,helical,compression
Rolls-Royce Corporation
5962-01-078-574540428 INTERCHANGEABLE
Microcircuit,memory
Raytheon Company Div Rmd Strategic
3040-01-165-481691105-991 INTERCHANGEABLE
Shaft,straight
Amz Alabama Inc.
3040-01-293-85924706-3 INTERCHANGEABLE
Connecting Link,rigid
Tyee Aircraft Inc Div Tyee Aircraft
6685-01-303-833540-428 INTERCHANGEABLE
Thermostat,flow Control
Thermo King Corporation Dba Phoenix Global Distirbution.
5999-01-378-98264706-3 INTERCHANGEABLE
Contact,electrical
Molex, Llc
6515-01-451-1361404-28 INTERCHANGEABLE
Screw,bone
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
Cross-Reference Index
Part NumberManufacturer
9859-4 Walker Mfg Co (USA)
EY2129 Maremont Corp (USA)
4X7063 Ap Parts Co Industrial Sales Div (USA)
40428 Walker Mfg Co (USA)
47063 Ap Parts Co Industrial Sales Div (USA)
4X8473 Arvin Industries Inc (USA)
C4TZ5246A Ford Motor Company (USA)
C4TZ5246A Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
E4277-4 Mahle Aftermarket Inc. Dba Ae Clevite Inc (USA)
Related Parts
5315-00-054-4095INTERCHANGEABLE
PIN,TAPERED,PLAIN
6L3904-11-1
3455-00-243-9487INTERCHANGEABLE
CUTTER,MILLING,ANGLE
A814-45L
5340-00-251-8341INTERCHANGEABLE
STRAP,RETAINING
S04706-003
5360-01-004-0258INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
47063
5962-01-078-5745INTERCHANGEABLE
MICROCIRCUIT,MEMORY
40428
3040-01-165-4816INTERCHANGEABLE
SHAFT,STRAIGHT
91105-991
3040-01-293-8592INTERCHANGEABLE
CONNECTING LINK,RIGID
4706-3
6685-01-303-8335INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
40-428
5999-01-378-9826INTERCHANGEABLE
CONTACT,ELECTRICAL
4706-3
6515-01-451-1361INTERCHANGEABLE
SCREW,BONE
404-28

Frequently Asked Questions

What is NSN 2990-00-491-9598?

NSN 2990-00-491-9598 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 2990-00-491-9598?

NSN 2990-00-491-9598 has 9 cross-referenced part numbers: 9859-4 (Walker Mfg Co), EY2129 (Maremont Corp), 4X7063 (Ap Parts Co Industrial Sales Div), 40428 (Walker Mfg Co), 47063 (Ap Parts Co Industrial Sales Div) and 4 more.

What NSN replaces 2990-00-491-9598?

There are 10 known substitutes for 2990-00-491-9598: 5315-00-054-4095, 3455-00-243-9487, 5340-00-251-8341 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9859-4?

Key specifications for 9859-4: Material: STEEL; Design Form: STRAIGHT; Nominal Outside Diameter: 2.000 INCHES IN; Nominal Overall Length: 80.250 INCHES IN. 4 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com