NSN 4420-01-397-6031 — this item is cataloged by the U.S. Government under National Stock Number 4420-01-397-6031. Manufacturer of record part number: 2HXPPB4.
Also searched as4420-01-397-6031 ·
4420013976031 ·
NIIN 013976031 ·
01-397-6031 ·
FSC 4420 Heat Exchangers and Steam Condensers · CAGE 06447 · 2HXPPB4
General Characteristics Item Description: PIPE END HAS 2.000 IN. NPT THREADS; FLANGE HAS 4 BOLT HOLES; PART OF THE PLUMBING SECTION OF A HEAT EXCHANGER, TYPE II, SIZE 2 IN
1 manufacturer part number on file
Manufacturer of record: Stepp Manufacturing Co Inc
The Flange Pipe Weldment, cataloged under National Stock Number 4420-01-397-6031, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Stepp Manufacturing Co Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4420-01-397-6031
Primary Part Number
2HXPPB4
Item Name
Flange Pipe Weldment
FSC / FSG
4420 / 44 — Heat Exchangers and Steam Condensers
Manufacturer
Stepp Manufacturing Co Inc
Status
ACTIVE
General Characteristics Item Description
PIPE END HAS 2.000 IN. NPT THREADS; FLANGE HAS 4 BOLT HOLES; PART OF THE PLUMBING SECTION OF A HEAT EXCHANGER, TYPE II, SIZE 2 IN
Other items in FSC 4420 — Heat Exchangers and Steam Condensers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4420-00-003-2812
CORE ASSEMBLY,FLUID HEATER,INDUS
4420-00-004-1071
4420-00-004-1071 · Item name not on file
4420-00-004-1072
4420-00-004-1072 · Item name not on file
4420-00-004-1073
4420-00-004-1073 · Item name not on file
4420-00-004-1074
4420-00-004-1074 · Item name not on file
4420-00-004-3860
COOLER,FLUID,INDUSTRIAL
4420-00-004-5260
4420-00-004-5260 · Item name not on file
4420-00-005-2335
PURGE ORIFICE ASSEMBLY
Frequently Asked Questions
What is NSN 4420-01-397-6031?
NSN 4420-01-397-6031 is a Flange Pipe Weldment, manufactured by Stepp Manufacturing Co Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
What part numbers are listed for NSN 4420-01-397-6031?
NSN 4420-01-397-6031 has 1 manufacturer part number on file: 2HXPPB4 (Stepp Manufacturing Co Inc).
What are the specifications of 2HXPPB4?
Key specifications for 2HXPPB4: General Characteristics Item Description: PIPE END HAS 2.000 IN. NPT THREADS; FLANGE HAS 4 BOLT HOLES; PART OF THE PLUMBING SECTION OF A HEAT EXCHANGER, TYPE II, SIZE 2 IN; End Item Identification: 3895-01-384-5307. 1 specification is documented in the U.S. Government catalog.
Is NSN 4420-01-397-6031 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.