PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AT-4Stem,torch

Uniweld Products, Inc. Dba Uniweld Products Inc · NSN 4820-01-003-7673 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-003-7673 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-003-7673. Primary manufacturer part number: AT-4.
Features
  • Stem,torch — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Uniweld Products, Inc. Dba Uniweld Products Inc
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Stem,torch, cataloged under National Stock Number 4820-01-003-7673, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Uniweld Products, Inc. Dba Uniweld Products Inc. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-003-7673
Primary Part NumberAT-4
Item NameStem,torch
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerUniweld Products, Inc. Dba Uniweld Products Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5342-00-073-5904AT4 INTERCHANGEABLE
Post
Roller Bearing Co of America, Inc Div Pic Design
3110-00-108-7465290-4 INTERCHANGEABLE
Bearing,roller,needle
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4010-00-185-0402 INTERCHANGEABLE
Chain Assembly,single Leg
6625-00-474-7644 INTERCHANGEABLE
Prod Double
2920-00-482-3837 INTERCHANGEABLE
Spark Plug
Cross-Reference Index
Part NumberManufacturer
AT-4 PRIMARY Uniweld Products, Inc. Dba Uniweld Products Inc (USA)
ASJ-6 Uniweld Products, Inc. Dba Uniweld Products Inc (USA)
Related Parts
5342-00-073-5904INTERCHANGEABLE
POST
AT4
3110-00-108-7465INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
290-4
4010-00-185-0402INTERCHANGEABLE
CHAIN ASSEMBLY,SINGLE LEG
6625-00-474-7644INTERCHANGEABLE
PROD DOUBLE
2920-00-482-3837INTERCHANGEABLE
SPARK PLUG

Frequently Asked Questions

What is NSN 4820-01-003-7673?

NSN 4820-01-003-7673 is a Stem,torch, manufactured by Uniweld Products, Inc. Dba Uniweld Products Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-003-7673?

NSN 4820-01-003-7673 has 2 cross-referenced part numbers: AT-4 (Uniweld Products, Inc. Dba Uniweld Products Inc), ASJ-6 (Uniweld Products, Inc. Dba Uniweld Products Inc).

What NSN replaces 4820-01-003-7673?

There are 5 known substitutes for 4820-01-003-7673: 5342-00-073-5904, 3110-00-108-7465, 4010-00-185-0402 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AT-4?

Key specifications for AT-4: End Item Identification: UNIWELD STANDARD MODEL TORCH. 1 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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