PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7801Valve,safety Relief

Henry Technologies, Inc. · NSN 4820-00-990-8881 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-990-8881 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-990-8881. Primary manufacturer part number: 7801.
Features
  • Valve,safety Relief — FSC 4820
  • Bonnet Type: INSIDE SCREW
  • Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN
  • Material: STEEL BODY
  • Surface Treatment: NICKEL LOCATION NOT OTHERWISE SPECIFIED
  • Style Designator: ANGLE
  • Valve Operation Method: AUTOMATIC
  • Flow Control Device: DISK
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-990-8881, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Henry Technologies, Inc.. Government technical data includes 16 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
NSN4820-00-990-8881
Primary Part Number7801
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHenry Technologies, Inc.
StatusACTIVE
Bonnet TypeINSIDE SCREW
Nominal Pipe Size Accommodated0.750 INCHES SECOND END IN
MaterialSTEEL BODY
Surface TreatmentNICKEL LOCATION NOT OTHERWISE SPECIFIED
Style DesignatorANGLE
Valve Operation MethodAUTOMATIC
Flow Control DeviceDISK
Features ProvidedBONNET PACKING
Nominal Outside Diameter Tube Accommodated0.750 INCHES SECOND END IN
Thread Series DesignatorNPT SECOND END
MaterialSTEEL STEM
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Connection StylePLAIN (PIPE) SECOND END
Bonnet Attachment MethodINTEGRAL
Nominal Thread Size0.750 INCHES SECOND END IN
Thread DirectionRIGHT-HAND SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-016-66767801 INTERCHANGEABLE
Clip,retaining
Connor Spring and Mfg Co Div of Sloss and Brittain Inc
5310-00-194-72566801 INTERCHANGEABLE
Washer,flat
Ngk-Locke, Inc.
3455-00-224-032513200 INTERCHANGEABLE
Cutter,milling,angle
Niagara Cutter Inc
2825-00-390-13087801 INTERCHANGEABLE
Weight Assembly
Northrop Grumman Systems Corporation Div Marine Systems
5960-00-442-9455 INTERCHANGEABLE
Electron Tube
5996-00-923-06557801 INTERCHANGEABLE
Amplifier,direct Current
Drs Signal Solutions, Inc.
5365-00-924-6406361808-1 INTERCHANGEABLE
Bushing,machine Thread
Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)
5960-00-930-5092 INTERCHANGEABLE
Electron Tube
5305-00-943-5929 INTERCHANGEABLE
Screw,cap,hexagon Head
5975-01-010-891917-C-18035-40 INTERCHANGEABLE
Conduit,nonmetallic,flexible
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
7801 Henry Technologies, Inc. (USA)
Related Parts
5340-00-016-6676INTERCHANGEABLE
CLIP,RETAINING
7801
5310-00-194-7256INTERCHANGEABLE
WASHER,FLAT
6801
3455-00-224-0325INTERCHANGEABLE
CUTTER,MILLING,ANGLE
13200
2825-00-390-1308INTERCHANGEABLE
WEIGHT ASSEMBLY
7801
5960-00-442-9455INTERCHANGEABLE
ELECTRON TUBE
5996-00-923-0655INTERCHANGEABLE
AMPLIFIER,DIRECT CURRENT
7801
5365-00-924-6406INTERCHANGEABLE
BUSHING,MACHINE THREAD
361808-1
5960-00-930-5092INTERCHANGEABLE
ELECTRON TUBE
5305-00-943-5929INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5975-01-010-8919INTERCHANGEABLE
CONDUIT,NONMETALLIC,FLEXIBLE
17-C-18035-40
6510-01-173-8836INTERCHANGEABLE
ADHESIVE PAD,COLOSTOMY-ILEOSTOMY
7801
5998-01-295-1787INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY

Frequently Asked Questions

What is NSN 4820-00-990-8881?

NSN 4820-00-990-8881 is a Valve,safety Relief, manufactured by Henry Technologies, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-990-8881?

NSN 4820-00-990-8881 has 1 cross-referenced part number: 7801 (Henry Technologies, Inc.).

What NSN replaces 4820-00-990-8881?

There are 12 known substitutes for 4820-00-990-8881: 5340-00-016-6676, 5310-00-194-7256, 3455-00-224-0325 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7801?

Key specifications for 7801: Bonnet Type: INSIDE SCREW; Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN; Material: STEEL BODY; Surface Treatment: NICKEL LOCATION NOT OTHERWISE SPECIFIED. 16 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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