NSN 2990-01-137-0446 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-137-0446. Manufacturer of record part number: C2100-23.
The Piston,main Valve, cataloged under National Stock Number 2990-01-137-0446, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Columbia Machine Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2990-00-096-8607
CONTROL ASSEMBLY,PUSH-PULL
2990-00-390-3445
CRANK,HAND,VEHICULAR
2990-00-459-7255
MUFFLER,EXHAUST
2990-00-459-7255
MUFFLER,EXHAUST
2990-00-536-2962
BLOCK,ADJUSTING SCREW
2990-00-903-8226
MUFFLER,EXHAUST
2990-01-151-5443
CONNECTOR,EXHAUST PIPE
2990-01-151-5443
CONNECTOR,EXHAUST PIPE
Frequently Asked Questions
What is NSN 2990-01-137-0446?
NSN 2990-01-137-0446 is a Piston,main Valve, manufactured by Columbia Machine Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
What part numbers are listed for NSN 2990-01-137-0446?
NSN 2990-01-137-0446 has 1 manufacturer part number on file: C2100-23 (Columbia Machine Inc).
Is NSN 2990-01-137-0446 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.