PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30-21HF4NFBAdapter,straight,pipe to Tube

Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company · NSN 4730-01-499-3401 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-499-3401 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-499-3401. Primary manufacturer part number: 30-21HF4NFB.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Nominal Width Across Flats: 1.000 INCHES ALL ENDS IN
  • Operating Pressure: 15000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Thread Series Designator: NPT SECOND END
  • Nominal Overall Length: 1.500 INCHES IN
  • Seat Angle: 60.0 DEGREES FIRST END
  • Nominal Thread Size: 0.5625 INCHES FIRST END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 316 Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-01-499-3401, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-499-3401
Primary Part Number30-21HF4NFB
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerGraco High Pressure Equipment Inc. Dba High Pressure Equipment Company
StatusACTIVE
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Nominal Width Across Flats1.000 INCHES ALL ENDS IN
Operating Pressure15000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Thread Series DesignatorNPT SECOND END
Nominal Overall Length1.500 INCHES IN
Seat Angle60.0 DEGREES FIRST END
Nominal Thread Size0.5625 INCHES FIRST END IN
Thread Quantity Per Inch18 ALL ENDS
Nominal Thread Size0.250 INCHES SECOND END IN
Thread ClassA3B FIRST END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Connection StyleHIGH PRESSURE FLARE (USED W/ MALE THREADED STYLE NO. 78)(TUBE) FIRST END
Connection TypeTHREADED INTERNAL TUBE FIRST END
Thread Series DesignatorUNF FIRST END
Connection StylePLAIN (PIPE) SECOND END
MaterialSTEEL COMP 316 OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5840-00-065-5336102820 INTERCHANGEABLE
Quadrant,antenna
L3harris Technologies, Inc Div Space & Airborne Systems
4820-00-848-2854115302 INTERCHANGEABLE
Valve,linear,directional Control
Allianz Sweeper Company
5330-01-120-6854102820 INTERCHANGEABLE
Gasket
Triumph Thermal Systems - Maryland, Inc.
6625-01-232-085610-2820 INTERCHANGEABLE
Meter Assembly,electrical
L3 Technologies, Inc.
Cross-Reference Index
Part NumberManufacturer
30-21HF4NFB PRIMARY Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company (USA)
102820 Dh Instruments Inc. (USA)
Related Parts
5840-00-065-5336INTERCHANGEABLE
QUADRANT,ANTENNA
102820
4820-00-848-2854INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
115302
5330-01-120-6854INTERCHANGEABLE
GASKET
102820
6625-01-232-0856INTERCHANGEABLE
METER ASSEMBLY,ELECTRICAL
10-2820

Frequently Asked Questions

What is NSN 4730-01-499-3401?

NSN 4730-01-499-3401 is a Adapter,straight,pipe to Tube, manufactured by Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-499-3401?

NSN 4730-01-499-3401 has 2 cross-referenced part numbers: 30-21HF4NFB (Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company), 102820 (Dh Instruments Inc.).

What NSN replaces 4730-01-499-3401?

There are 4 known substitutes for 4730-01-499-3401: 5840-00-065-5336, 4820-00-848-2854, 5330-01-120-6854 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30-21HF4NFB?

Key specifications for 30-21HF4NFB: Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Part Name Assigned by Controlling Agency: FEMALE HIGH PRESSURE TO FEMALE NPT PIPE; Special Features: ADAPTER IS OCTAGONAL IN SHAPE FOR THE FULL LENGTH; Nominal Width Across Flats: 1.000 INCHES ALL ENDS IN. 19 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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