PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9521Valve,safety Relief

Pneudraulics, Inc. · NSN 4820-01-478-5982 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-478-5982 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-478-5982. Primary manufacturer part number: 9521.
Features
  • Valve,safety Relief — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Pneudraulics, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-478-5982, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Pneudraulics, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-478-5982
Primary Part Number9521
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerPneudraulics, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6532-00-163-76219511 INTERCHANGEABLE
Surgical Pack,gown and Towel
Cardinal Health 200, Llc
5120-00-180-0777 INTERCHANGEABLE
Extractor,screw
6220-00-536-0942 INTERCHANGEABLE
Light,special Purpo
5325-00-640-99862092 INTERCHANGEABLE
Grommet,nonmetallic
Atlantic India Rubber Co Inc
5930-00-981-3270168312-1 INTERCHANGEABLE
Switch,rotary
Raytheon Company
4820-01-150-495606676001132 INTERCHANGEABLE
Cap,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4730-01-151-44793890.403.130 INTERCHANGEABLE
Tailpiece,union
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-151-8978C-6678 INTERCHANGEABLE
Body,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-192-347709521-51 TO 70PSI INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-275-416287CS165-5PSI9OT15PSI-BRZ INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
Cross-Reference Index
Part NumberManufacturer
9521 PRIMARY Pneudraulics, Inc. (USA)
Related Parts
6532-00-163-7621INTERCHANGEABLE
SURGICAL PACK,GOWN AND TOWEL
9511
5120-00-180-0777INTERCHANGEABLE
EXTRACTOR,SCREW
6220-00-536-0942INTERCHANGEABLE
LIGHT,SPECIAL PURPO
5325-00-640-9986INTERCHANGEABLE
GROMMET,NONMETALLIC
2092
5930-00-981-3270INTERCHANGEABLE
SWITCH,ROTARY
168312-1
4820-01-150-4956INTERCHANGEABLE
CAP,VALVE
06676001132
4730-01-151-4479INTERCHANGEABLE
TAILPIECE,UNION
3890.403.130
4820-01-151-8978INTERCHANGEABLE
BODY,VALVE
C-6678
4820-01-192-3477INTERCHANGEABLE
VALVE,SAFETY RELIEF
09521-51 TO 70PSI
4820-01-275-4162INTERCHANGEABLE
VALVE,SAFETY RELIEF
87CS165-5PSI9OT15PSI-BRZ
5998-01-367-8885INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
902-01 ITEM 21

Frequently Asked Questions

What is NSN 4820-01-478-5982?

NSN 4820-01-478-5982 is a Valve,safety Relief, manufactured by Pneudraulics, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-478-5982?

NSN 4820-01-478-5982 has 1 cross-referenced part number: 9521 (Pneudraulics, Inc.).

What NSN replaces 4820-01-478-5982?

There are 11 known substitutes for 4820-01-478-5982: 6532-00-163-7621, 5120-00-180-0777, 6220-00-536-0942 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9521?

Key specifications for 9521: End Item Identification: USED ON AIRCRAFT AC 130U TGMS. 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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