PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3649Diaphragm,valve,flat

Btr Valve Sealants Inc · NSN 4820-00-488-8279 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-488-8279 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-488-8279. Primary manufacturer part number: 3649.
Features
  • Diaphragm,valve,flat — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Btr Valve Sealants Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-488-8279, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Btr Valve Sealants Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiaphragm,valve,flat
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersBtr Valve Sealants Inc (CAGE 80318); Rockwell International Corp Flow Control Div (CAGE 98283)
Technical Specifications
ParameterValue
NSN4820-00-488-8279
Primary Part Number3649
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerBtr Valve Sealants Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5120-00-056-39455120-00-056-3945 INTERCHANGEABLE
Blade,nutdriver
General Services Administration Federal Supply Service
2810-00-169-91803649 INTERCHANGEABLE
Plate,discharge Vanes
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5310-00-194-14773649 INTERCHANGEABLE
Washer,flat
Telemechanics Inc
5342-00-590-9898 INTERCHANGEABLE
Lock,cylinder
5975-00-687-17093649 INTERCHANGEABLE
Ferrule,electrical Conduit
Champion Aerospace Llc
6515-00-905-147325-868-2WCS NEUTRAL INTERCHANGEABLE
Applicator,disposable
Puritan Medical Products Company I Lp
5330-01-223-351936-GS-1001 INTERCHANGEABLE
Gasket
Somat Company
4720-01-297-02555590024 INTERCHANGEABLE
Hose,nonmetallic
Am General Llc
6145-01-498-44133649 INTERCHANGEABLE
Wire,electrical
Amw Cuyuna Engine Co. Inc Dba Two Stroke International
3460-01-564-71363649 INTERCHANGEABLE
Key,drill Chuck
Jacobs Chuck Mfg Co
Cross-Reference Index
Part NumberManufacturer
3649 PRIMARY Btr Valve Sealants Inc (USA)
3649 Rockwell International Corp Flow Control Div (USA)
Related Parts
5120-00-056-3945INTERCHANGEABLE
BLADE,NUTDRIVER
5120-00-056-3945
2810-00-169-9180INTERCHANGEABLE
PLATE,DISCHARGE VANES
3649
5310-00-194-1477INTERCHANGEABLE
WASHER,FLAT
3649
5342-00-590-9898INTERCHANGEABLE
LOCK,CYLINDER
5975-00-687-1709INTERCHANGEABLE
FERRULE,ELECTRICAL CONDUIT
3649
6515-00-905-1473INTERCHANGEABLE
APPLICATOR,DISPOSABLE
25-868-2WCS NEUTRAL
5330-01-223-3519INTERCHANGEABLE
GASKET
36-GS-1001
4720-01-297-0255INTERCHANGEABLE
HOSE,NONMETALLIC
5590024
6145-01-498-4413INTERCHANGEABLE
WIRE,ELECTRICAL
3649
3460-01-564-7136INTERCHANGEABLE
KEY,DRILL CHUCK
3649
4730-01-680-3337INTERCHANGEABLE
ELBOW,FLANGE TO HOSE
390-24-24

Frequently Asked Questions

What is NSN 4820-00-488-8279?

NSN 4820-00-488-8279 is a Diaphragm,valve,flat, manufactured by Btr Valve Sealants Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-488-8279?

NSN 4820-00-488-8279 has 2 cross-referenced part numbers: 3649 (Btr Valve Sealants Inc), 3649 (Rockwell International Corp Flow Control Div).

What NSN replaces 4820-00-488-8279?

There are 11 known substitutes for 4820-00-488-8279: 5120-00-056-3945, 2810-00-169-9180, 5310-00-194-1477 and 8 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com