PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4D121Valve,angle

Allen Aircraft Products Inc · NSN 4820-00-817-7230 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-817-7230 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-817-7230. Primary manufacturer part number: 4D121.
Features
  • Valve,angle — FSC 4820
  • Thread Series Designator: UNF FIRST END
  • Material: ALUMINUM ALLOY 2014 SEAT
  • Thread Quantity Per Inch: 20 FIRST END
  • Test Data Document: 76301-32-69025 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
  • Thread Class: 3A FIRST END A
  • Valve Operation Method: MANUAL
  • Style Designator: ANGLE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Aluminum Alloy 2014 Seat construction
General Description

The Valve,angle, cataloged under National Stock Number 4820-00-817-7230, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Allen Aircraft Products Inc. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-817-7230
Primary Part Number4D121
Item NameValve,angle
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAllen Aircraft Products Inc
StatusACTIVE
Thread Series DesignatorUNF FIRST END
MaterialALUMINUM ALLOY 2014 SEAT
Thread Quantity Per Inch20 FIRST END
Test Data Document76301-32-69025 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
Thread Class3A FIRST END A
Valve Operation MethodMANUAL
Style DesignatorANGLE
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Nominal Thread Size0.437 INCHES FIRST END IN
Bonnet Attachment MethodINTEGRAL
Thread DirectionRIGHT-HAND FIRST END
Surface TreatmentANODIZE
Seat Angle37.0 DEGREES FIRST END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Features ProvidedBONNET PACKING
MaterialALUMINUM ALLOY 2014 BODY
Bonnet TypeINSIDE SCREW
Surface Treatment Document and ClassificationMIL-A-8625,TYPE 2 MIL STD SINGLE TREATMENT RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5310-00-012-0399120399 INTERCHANGEABLE
Nut,plain,square
Us Army Aviation and Missile Command
4510-00-477-823912-384 INTERCHANGEABLE
Lavatory
Gerber Plumbing Fixtures Llc
5950-00-509-907212384 INTERCHANGEABLE
Transformer,power
Freed Transformer Co
5905-01-047-2258627221552-001 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Lockheed Martin Corporation
5330-01-073-577412384 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
3120-01-276-737912384 INTERCHANGEABLE
Bushing,sleeve
Laguna Pueblo of Dba Laguna Tribal Courts
2590-01-356-823412384 INTERCHANGEABLE
Winch Cable,bar,rub
DP Manufacturing Inc.
5999-01-367-18126122836 INTERCHANGEABLE
Shielding Gasket,electronic
Naval Sea Systems Command
6610-01-445-1036123-0084 INTERCHANGEABLE
Housing,indicator
Aerosonic Llc
5305-01-674-944012384 INTERCHANGEABLE
Screw,shoulder
Consolidated Sewing Machine Corp
Cross-Reference Index
Part NumberManufacturer
4D121 PRIMARY Allen Aircraft Products Inc (USA)
32-69025-1 The Boeing Company Div Defense (USA)
4820PL2132519 Jednolity Indeks Materialowy - Uniform Material Index (POL)
4820PL0577408 Jednolity Indeks Materialowy - Uniform Material Index (POL)
32-69025-3 The Boeing Company Div Defense (USA)
12384 Saf Industries Llc Dba Saf Industries Llc Div Garkenyon (USA)
Related Parts
5310-00-012-0399INTERCHANGEABLE
NUT,PLAIN,SQUARE
120399
4510-00-477-8239INTERCHANGEABLE
LAVATORY
12-384
5950-00-509-9072INTERCHANGEABLE
TRANSFORMER,POWER
12384
5905-01-047-2258INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
627221552-001
5330-01-073-5774INTERCHANGEABLE
SEAL,PLAIN ENCASED
12384
3120-01-276-7379INTERCHANGEABLE
BUSHING,SLEEVE
12384
2590-01-356-8234INTERCHANGEABLE
WINCH CABLE,BAR,RUB
12384
5999-01-367-1812INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
6122836
6610-01-445-1036INTERCHANGEABLE
HOUSING,INDICATOR
123-0084
5305-01-674-9440INTERCHANGEABLE
SCREW,SHOULDER
12384

Frequently Asked Questions

What is NSN 4820-00-817-7230?

NSN 4820-00-817-7230 is a Valve,angle, manufactured by Allen Aircraft Products Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-817-7230?

NSN 4820-00-817-7230 has 6 cross-referenced part numbers: 4D121 (Allen Aircraft Products Inc), 32-69025-1 (The Boeing Company Div Defense), 4820PL2132519 (Jednolity Indeks Materialowy - Uniform Material Index), 4820PL0577408 (Jednolity Indeks Materialowy - Uniform Material Index), 32-69025-3 (The Boeing Company Div Defense) and 1 more.

What NSN replaces 4820-00-817-7230?

There are 10 known substitutes for 4820-00-817-7230: 5310-00-012-0399, 4510-00-477-8239, 5950-00-509-9072 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4D121?

Key specifications for 4D121: Thread Series Designator: UNF FIRST END; End Item Identification: ACFT,TYPE F-4 (TOTAL); T.O. 1F- 4C-4-3,FIG 77,INDEX 63; Material: ALUMINUM ALLOY 2014 SEAT; Thread Quantity Per Inch: 20 FIRST END. 20 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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