PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1648Valve,safety Relief

Pneudraulics, Inc. · NSN 4820-00-172-8355 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-172-8355 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-172-8355. Primary manufacturer part number: 1648.
Features
  • Valve,safety Relief — FSC 4820
  • Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
  • Connection Type: THREADED INTERNAL BOSS FIRST END
  • Connection Type: THREADED INTERNAL BOSS SECOND END
  • Disk Loading Method: SPRING
  • Connection Style: GASKET SEAL(BOSS) FIRST END
  • Valve Operation Method: AUTOMATIC
  • Surface Treatment: PASSIVATE LOCATION NOT OTHERWISE SPECIFIED
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-172-8355, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Pneudraulics, Inc.. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). 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
NSN4820-00-172-8355
Primary Part Number1648
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerPneudraulics, Inc.
StatusACTIVE
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Connection TypeTHREADED INTERNAL BOSS FIRST END
Connection TypeTHREADED INTERNAL BOSS SECOND END
Disk Loading MethodSPRING
Connection StyleGASKET SEAL(BOSS) FIRST END
Valve Operation MethodAUTOMATIC
Surface TreatmentPASSIVATE LOCATION NOT OTHERWISE SPECIFIED
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Surface TreatmentPASSIVATE LOCATION NOT OTHERWISE SPECIFIED
MaterialSTEEL CORROSION RESISTING BODY
Style DesignatorSTRAIGHT THRU
Style DesignatorSTRAIGHT THRU
MaterialSTEEL CORROSION RESISTING BODY
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-021-97551045H INTERCHANGEABLE
Nut,plain,hexagon
Dorsey Trailers Inc
4310-00-173-52741648 INTERCHANGEABLE
Ring,piston
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
8135-00-239-16481648 INTERCHANGEABLE
Tag,shipping
American Packaging I, Inc.
4730-00-391-37539A6033 INTERCHANGEABLE
Fitting,lubrication
Napco International Llc Dba Napco International Inc
4820-00-473-12991710 INTERCHANGEABLE
Valve,safety Relief
Pneudraulics, Inc.
4820-00-859-37891648 INTERCHANGEABLE
Seat,valve
Lawler Manufacturing Company, Inc.
5950-00-928-3254D0T48 INTERCHANGEABLE
Transformer,audio Frequency
Magnetika Inc
3441-00-982-1729 INTERCHANGEABLE
Press Brake,power Operated
5910-01-055-2737 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
5935-01-196-7114 INTERCHANGEABLE
Clamp,cable,electrical Connector
Cross-Reference Index
Part NumberManufacturer
1648 PRIMARY Pneudraulics, Inc. (USA)
Related Parts
5310-00-021-9755INTERCHANGEABLE
NUT,PLAIN,HEXAGON
1045H
4310-00-173-5274INTERCHANGEABLE
RING,PISTON
1648
8135-00-239-1648INTERCHANGEABLE
TAG,SHIPPING
1648
4730-00-391-3753INTERCHANGEABLE
FITTING,LUBRICATION
9A6033
4820-00-473-1299INTERCHANGEABLE
VALVE,SAFETY RELIEF
1710
4820-00-859-3789INTERCHANGEABLE
SEAT,VALVE
1648
5950-00-928-3254INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
D0T48
3441-00-982-1729INTERCHANGEABLE
PRESS BRAKE,POWER OPERATED
5910-01-055-2737INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
5935-01-196-7114INTERCHANGEABLE
CLAMP,CABLE,ELECTRICAL CONNECTOR
3810-01-498-0607INTERCHANGEABLE
CONNECTOR,ELECTRICAL,ROTARY
5616137
2540-01-576-6809INTERCHANGEABLE
LAV-R BALLISTIC INS
1648

Frequently Asked Questions

What is NSN 4820-00-172-8355?

NSN 4820-00-172-8355 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 4820-00-172-8355?

NSN 4820-00-172-8355 has 1 cross-referenced part number: 1648 (Pneudraulics, Inc.).

What NSN replaces 4820-00-172-8355?

There are 12 known substitutes for 4820-00-172-8355: 5310-00-021-9755, 4310-00-173-5274, 8135-00-239-1648 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1648?

Key specifications for 1648: Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE; Connection Type: THREADED INTERNAL BOSS FIRST END; Connection Type: THREADED INTERNAL BOSS SECOND END; Disk Loading Method: SPRING. 15 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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