PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40104-04Cap Assembly,protective,muffler-

Bowhead Manufacturing Company, L.l.c. · NSN 2990-01-560-6258 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-560-6258 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-560-6258. Primary manufacturer part number: 40104-04.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • 2 verified cross-references
  • Primary manufacturer: Bowhead Manufacturing Company, L.l.c.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-01-560-6258, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Bowhead Manufacturing Company, L.l.c.. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-01-560-6258
Primary Part Number40104-04
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerBowhead Manufacturing Company, L.l.c.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5136-00-189-3217402274 INTERCHANGEABLE
Die,thread Cutting
Greenfield Industries Inc
6220-01-086-568940204 INTERCHANGEABLE
Light,backup
Truck-Lite Co., Llc
4820-01-264-560540204-802 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5330-01-306-505840204 INTERCHANGEABLE
Seal,nonmetallic Round Section
Bell Intl Inc
5995-01-341-37554-020-4 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Advanced Circuit Systems Inc
6530-01-388-0221402-04 INTERCHANGEABLE
Litter Pad,sea-Air Rescue,medica
Lifesaving Systems Llc
5895-01-394-338540204 INTERCHANGEABLE
Interface Unit,communication Equ
Acterna Llc Dba Jdsu
8415-01-541-943240204 INTERCHANGEABLE
Jacket,combat
180s, Llc
6530-01-586-6410 INTERCHANGEABLE
Pad,surgical Operating
6515-01-644-538140-204 INTERCHANGEABLE
Stethoscope,doppler,ultrasonic
Panakeia, Llc
Cross-Reference Index
Part NumberManufacturer
40104-04 PRIMARY Bowhead Manufacturing Company, L.l.c. (USA)
402-04 Bowhead Manufacturing Company, L.l.c. (USA)
Related Parts
5136-00-189-3217INTERCHANGEABLE
DIE,THREAD CUTTING
402274
6220-01-086-5689INTERCHANGEABLE
LIGHT,BACKUP
40204
4820-01-264-5605INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40204-802
5330-01-306-5058INTERCHANGEABLE
SEAL,NONMETALLIC ROUND SECTION
40204
5995-01-341-3755INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
4-020-4
6530-01-388-0221INTERCHANGEABLE
LITTER PAD,SEA-AIR RESCUE,MEDICA
402-04
5895-01-394-3385INTERCHANGEABLE
INTERFACE UNIT,COMMUNICATION EQU
40204
8415-01-541-9432INTERCHANGEABLE
JACKET,COMBAT
40204
6530-01-586-6410INTERCHANGEABLE
PAD,SURGICAL OPERATING
6515-01-644-5381INTERCHANGEABLE
STETHOSCOPE,DOPPLER,ULTRASONIC
40-204
2825-01-648-5974INTERCHANGEABLE
SEAL RING ASSEMBLY,LABYRINTH
40204

Frequently Asked Questions

What is NSN 2990-01-560-6258?

NSN 2990-01-560-6258 is a Cap Assembly,protective,muffler-, manufactured by Bowhead Manufacturing Company, L.l.c., classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-560-6258?

NSN 2990-01-560-6258 has 2 cross-referenced part numbers: 40104-04 (Bowhead Manufacturing Company, L.l.c.), 402-04 (Bowhead Manufacturing Company, L.l.c.).

What NSN replaces 2990-01-560-6258?

There are 11 known substitutes for 2990-01-560-6258: 5136-00-189-3217, 6220-01-086-5689, 4820-01-264-5605 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40104-04?

Key specifications for 40104-04: Special Features: MANUFACTURES NAME:4" RAIN CAP; End Item Identification: PUMP ASSEMBLY,WATER;4320-01-533-6418. 2 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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