PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30021Spring,valve,musical Instrument

Conn-Selmer, Inc. · NSN 7720-01-582-8235 · FSC 7720 · No Item Name Available
Verified by PartsTable
NSN 7720-01-582-8235 — this item is cataloged by the U.S. Government under National Stock Number 7720-01-582-8235. Primary manufacturer part number: 30021.
Features
  • Spring,valve,musical Instrument — FSC 7720
  • 1 verified cross-reference
  • Primary manufacturer: Conn-Selmer, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Mechanical energy storage
  • Vibration dampening
General Description

The Spring,valve,musical Instrument, cataloged under National Stock Number 7720-01-582-8235, is classified within Federal Supply Class 7720 (No Item Name Available) of the Musical Instruments, Phonographs group. The primary manufacturer of record is Conn-Selmer, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN7720-01-582-8235
Primary Part Number30021
Item NameSpring,valve,musical Instrument
FSC / FSG7720 / 77 — No Item Name Available
ManufacturerConn-Selmer, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5910-00-106-0931441-1030-021 INTERCHANGEABLE
Capacitor,fixed,electrolytic
The Boeing Company Div Legacy Boeing Hb1
5930-00-936-457230021 INTERCHANGEABLE
Switch,push
Essex Industries Inc Div Manufacturing Division
5940-00-988-5076BLU4S2 INTERCHANGEABLE
Terminal,lug
Penn-Union Corp Div Penn-Union Corp
5930-01-012-874830021 INTERCHANGEABLE
Switch,liquid Level
Setra Systems, Inc. Dba Gems Sensors
2590-01-030-377730021 INTERCHANGEABLE
Hydraulic Power Sup
Cadillac Gage Textron Inc.
5962-01-115-2154 INTERCHANGEABLE
Microcircuit,digital
5998-01-119-6749 INTERCHANGEABLE
Circuit Card Assembly
5895-01-223-4569 INTERCHANGEABLE
Up Converter
4820-01-286-425930021 INTERCHANGEABLE
Valve,linear,directional Control
Hanson Machine
5130-01-397-97503002-1 INTERCHANGEABLE
Drill,electric,portable
Milwaukee Electric Tool Corp Dba Milwaukee Electric Tools
Cross-Reference Index
Part NumberManufacturer
30021 PRIMARY Conn-Selmer, Inc. (USA)
Related Parts
5910-00-106-0931INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
441-1030-021
5930-00-936-4572INTERCHANGEABLE
SWITCH,PUSH
30021
5940-00-988-5076INTERCHANGEABLE
TERMINAL,LUG
BLU4S2
5930-01-012-8748INTERCHANGEABLE
SWITCH,LIQUID LEVEL
30021
2590-01-030-3777INTERCHANGEABLE
HYDRAULIC POWER SUP
30021
5962-01-115-2154INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5998-01-119-6749INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5895-01-223-4569INTERCHANGEABLE
UP CONVERTER
4820-01-286-4259INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
30021
5130-01-397-9750INTERCHANGEABLE
DRILL,ELECTRIC,PORTABLE
3002-1
6520-01-501-0560INTERCHANGEABLE
BUR,DENTAL SURGERY
30021
4820-01-644-7412INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
023-0058-00

Frequently Asked Questions

What is NSN 7720-01-582-8235?

NSN 7720-01-582-8235 is a Spring,valve,musical Instrument, manufactured by Conn-Selmer, Inc., classified under FSC 7720 (No Item Name Available). Status: active.

What are the part numbers for NSN 7720-01-582-8235?

NSN 7720-01-582-8235 has 1 cross-referenced part number: 30021 (Conn-Selmer, Inc.).

What NSN replaces 7720-01-582-8235?

There are 12 known substitutes for 7720-01-582-8235: 5910-00-106-0931, 5930-00-936-4572, 5940-00-988-5076 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30021?

Key specifications for 30021: Part Name Assigned by Controlling Agency: SELMER 30021, VALVE SPRING, INSTRUMENT. 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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