The Extension Assy, cataloged under National Stock Number 3433-01-122-9221, is classified within Federal Supply Class 3433 (Gas Welding, Heat Cutting, and Metalizing Equipment) of the Metalworking Machinery (continued) group. The manufacturer of record is Oerlikon Metco Us 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3433-01-122-9221 |
| Primary Part Number | 7MST-2 |
| Item Name | Extension Assy |
| FSC / FSG | 3433 / 34 — Gas Welding, Heat Cutting, and Metalizing Equipment |
| Manufacturer | Oerlikon Metco Us Inc |
| Status | ACTIVE |
| General Characteristics Item Description | LGTH 2 FT,OPERATES 13.000 IN. DEPTH IN BORES 1.625 IN. DIA,OPERATES 20.000 IN. DEPTH IN BORES OVER 2.000 IN. DIA,USE WITH ARGON/HELIUM OR ARGON/HYDROGEN GASES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7MST-2 PRIMARY | Oerlikon Metco Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 7MST-2 | 5/9 Secondary reference Metco Inc Sub of the Perkin-Elmer Corp |
NSN 3433-01-122-9221 is a Extension Assy, manufactured by Oerlikon Metco Us Inc, classified under FSC 3433, Gas Welding, Heat Cutting, and Metalizing Equipment. Status: active.
NSN 3433-01-122-9221 has 1 manufacturer part number on file: 7MST-2 (Oerlikon Metco Us Inc).
Key specifications for 7MST-2: General Characteristics Item Description: LGTH 2 FT,OPERATES 13.000 IN. DEPTH IN BORES 1.625 IN. DIA,OPERATES 20.000 IN. DEPTH IN BORES OVER 2.000 IN. DIA,USE WITH ARGON/HELIUM OR ARGON/HYDROGEN GASES IN. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.