PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51021Valve,angle

Velan Valve Corp. · NSN 4820-00-892-2127 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-892-2127 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-892-2127. Primary manufacturer part number: 51021.
Features
  • Valve,angle — FSC 4820
  • Bonnet Attachment Method: BOLTED
  • Connection Type: FLANGE ALL ENDS
  • Material: STEEL BODY
  • Material: STEEL SEAT
  • Valve Size: 0.500 INCHES IN
  • Material: STEEL FLOW CONTROL DEVICE
  • Features Provided: BONNET PACKING
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Body construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-00-892-2127, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Velan Valve Corp.. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-892-2127
Primary Part Number51021
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerVelan Valve Corp.
StatusCANCELLED
Bonnet Attachment MethodBOLTED
Connection TypeFLANGE ALL ENDS
MaterialSTEEL BODY
MaterialSTEEL SEAT
Valve Size0.500 INCHES IN
MaterialSTEEL FLOW CONTROL DEVICE
Features ProvidedBONNET PACKING
Valve Operation MethodMANUAL
Flange ShapeROUND WITH HOLES ALL ENDS
Maximum Operating Temp800.0 FAHRENHEIT SINGLE RESPONSE DEGF
Bolt Hole Quantity4 ALL ENDS
Bolt Circle Nominal Diameter2.250 INCHES ALL ENDS IN
Flange Face DesignRAISED STRAIGHT ALL ENDS
Media for Which DesignedSTEAM SINGLE RESPONSE
MaterialSTEEL STEM
Raised Face Nominal Height0.250 INCHES ALL ENDS IN
First Connection Face to Centerline Distance3.188 INCHES IN
Raised Face Nominal Diameter1.250 INCHES ALL ENDS IN
Bonnet TypeOUTSIDE SCREW-YOKE
Flow Control DeviceNEEDLE
Operating Pressure600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nondefinitive Spec/std DataB COMPOSITION AND 600 RATING
Nominal Outside Diameter3.375 INCHES ALL ENDS IN
Second Connection Face to Centerline Distance3.188 INCHES IN
Bolt Hole Nominal Diameter0.562 INCHES ALL ENDS IN
Nominal Thickness0.438 INCHES ALL ENDS IN
Style DesignatorANGLE FLANGED ENDS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5330-00-019-0632C6908 INTERCHANGEABLE
Packing,preformed
Hydro Line Mfg Co
5999-00-078-144850701-000 INTERCHANGEABLE
Contact Assembly,electrical
Rees, Inc
5935-00-105-76631005202-3 INTERCHANGEABLE
Guide,electrical Connector
Armel De Llc Dba Armel Electronics
5340-00-205-5266 INTERCHANGEABLE
Button,plug
5310-00-209-2594110S20 INTERCHANGEABLE
Washer,key
Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St)
6160-00-643-04043168059PCAA INTERCHANGEABLE
Jar,battery
Naval Ship Systems Command
4820-00-772-25015102-1 INTERCHANGEABLE
Valve,pressure Equalizing,gaseou
Aar Allen Services, Inc Dba Aar Component Services Wellington
5315-00-918-705451021 INTERCHANGEABLE
Pin,quick Release
Avibank Mfg., Inc. Dba Avibank Manufacturing Inc
5330-01-024-456251021 INTERCHANGEABLE
Seal Assembly
Shaw Development, Llc
7510-01-047-023036-12153-01 INTERCHANGEABLE
Ribbon,inking
Compaq Federal Llc
Cross-Reference Index
Part NumberManufacturer
51021 PRIMARY Velan Valve Corp. (USA)
CS4820-0014AKMPW Process Welding and Fabrication Inc (USA)
MILV22094 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILV22094C0MP0SITI0NBSERIES600 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5330-00-019-0632INTERCHANGEABLE
PACKING,PREFORMED
C6908
5999-00-078-1448INTERCHANGEABLE
CONTACT ASSEMBLY,ELECTRICAL
50701-000
5935-00-105-7663INTERCHANGEABLE
GUIDE,ELECTRICAL CONNECTOR
1005202-3
5340-00-205-5266INTERCHANGEABLE
BUTTON,PLUG
5310-00-209-2594INTERCHANGEABLE
WASHER,KEY
110S20
6160-00-643-0404INTERCHANGEABLE
JAR,BATTERY
3168059PCAA
4820-00-772-2501INTERCHANGEABLE
VALVE,PRESSURE EQUALIZING,GASEOU
5102-1
5315-00-918-7054INTERCHANGEABLE
PIN,QUICK RELEASE
51021
5330-01-024-4562INTERCHANGEABLE
SEAL ASSEMBLY
51021
7510-01-047-0230INTERCHANGEABLE
RIBBON,INKING
36-12153-01
7045-01-086-2044INTERCHANGEABLE
TAPE,ELECTRONIC DATA PROCESSING
9150-01-193-1443INTERCHANGEABLE
LUBRICANT,SOLID FILM
51021

Frequently Asked Questions

What is NSN 4820-00-892-2127?

NSN 4820-00-892-2127 is a Valve,angle, manufactured by Velan Valve Corp., classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-892-2127?

NSN 4820-00-892-2127 has 4 cross-referenced part numbers: 51021 (Velan Valve Corp.), CS4820-0014AKMPW (Process Welding and Fabrication Inc), MILV22094 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILV22094C0MP0SITI0NBSERIES600 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4820-00-892-2127?

There are 12 known substitutes for 4820-00-892-2127: 5330-00-019-0632, 5999-00-078-1448, 5935-00-105-7663 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51021?

Key specifications for 51021: Bonnet Attachment Method: BOLTED; Connection Type: FLANGE ALL ENDS; Material: STEEL BODY; Material: STEEL SEAT. 27 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-892-2127 still in active supply?

NSN 4820-00-892-2127 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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