PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N33991Ring,flange,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-210-0399 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-210-0399 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-210-0399. Primary manufacturer part number: N33991.
Features
  • Ring,flange,valve — FSC 4820
  • 6 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Ring,flange,valve, cataloged under National Stock Number 4820-01-210-0399, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. This item has 6 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing,flange,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersLeslie Controls, Inc. Dba Leslie Controls Inc (CAGE 35795)
Technical Specifications
ParameterValue
NSN4820-01-210-0399
Primary Part NumberN33991
Item NameRing,flange,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6250-00-228-0382262-0298-000 INTERCHANGEABLE
Lampholder
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
3020-00-333-2972201413 INTERCHANGEABLE
Gear,bevel
Viking Technologies, Ltd.
5360-00-358-89948A6308 INTERCHANGEABLE
Spring,helical,compression
Napco International Llc Dba Napco International Inc
6210-01-021-0129 INTERCHANGEABLE
Filter,indicator Light
4820-01-423-1988N33971 INTERCHANGEABLE
Cap,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
6625-01-583-731533-991 INTERCHANGEABLE
Test Set,electrical Cable
Ideal Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
20 1.4.1.3 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N33991 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N20610 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
14801N PC 48 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
33991 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
20 1.4.1.3 PIECE 37 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
6250-00-228-0382INTERCHANGEABLE
LAMPHOLDER
262-0298-000
3020-00-333-2972INTERCHANGEABLE
GEAR,BEVEL
201413
5360-00-358-8994INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8A6308
6210-01-021-0129INTERCHANGEABLE
FILTER,INDICATOR LIGHT
4820-01-423-1988INTERCHANGEABLE
CAP,VALVE
N33971
6625-01-583-7315INTERCHANGEABLE
TEST SET,ELECTRICAL CABLE
33-991

Frequently Asked Questions

What is NSN 4820-01-210-0399?

NSN 4820-01-210-0399 is a Ring,flange,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-210-0399?

NSN 4820-01-210-0399 has 6 cross-referenced part numbers: 20 1.4.1.3 (Leslie Controls, Inc. Dba Leslie Controls Inc), N33991 (Leslie Controls, Inc. Dba Leslie Controls Inc), N20610 (Leslie Controls, Inc. Dba Leslie Controls Inc), 14801N PC 48 (Leslie Controls, Inc. Dba Leslie Controls Inc), 33991 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 1 more.

What NSN replaces 4820-01-210-0399?

There are 6 known substitutes for 4820-01-210-0399: 6250-00-228-0382, 3020-00-333-2972, 5360-00-358-8994 and 3 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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