PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K1-8Adapter,straight,pipe to Tube

Allied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill · NSN 4730-01-252-7428 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-252-7428 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-252-7428. Primary manufacturer part number: K1-8.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Connection Type: THREADED INTERNAL PIPE SECOND END
  • Furnished Items and Quantity: 1 GASKET
  • Connection Style: FLARED (TUBE) FIRST END
  • Thread Series Designator: UNF FIRST END
  • Connection Style: PLAIN (PIPE) SECOND END
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Thread Series Designator: NPT SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-01-252-7428, 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 Allied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill. Government technical data includes 12 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-252-7428
Primary Part NumberK1-8
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAllied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill
StatusACTIVE
Connection TypeTHREADED INTERNAL PIPE SECOND END
Furnished Items and Quantity1 GASKET
Connection StyleFLARED (TUBE) FIRST END
Thread Series DesignatorUNF FIRST END
Connection StylePLAIN (PIPE) SECOND END
Nominal Thread Size0.438 INCHES FIRST END IN
Thread Series DesignatorNPT SECOND END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Seat Angle37.0 DEGREES FIRST END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Thread Class2A FIRST END A
Nominal Thread Size0.500 INCHES SECOND END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3120-00-343-056221-400 INTERCHANGEABLE
Bearing,sleeve
Rix Industries
5120-00-348-7652K18 INTERCHANGEABLE
Contact Positioner,terminal Crim
Daniels Manufacturing Corporation
5945-00-510-0550 INTERCHANGEABLE
Relay,electromagnetic
5120-00-541-180804-M-1/8 INTERCHANGEABLE
Holder,sheet Metal,hole
Us Air Tool Co., Inc.
4720-00-676-79362556-6 INTERCHANGEABLE
Hose,nonmetallic
Danfoss Power Solutions II, Llc
5305-00-882-0821K18 INTERCHANGEABLE
Screw,shoulder
Arriflex Corp
5120-01-023-6511K-1/8 INTERCHANGEABLE
Holder,sheet Metal,hole
Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc
5315-01-364-0838 INTERCHANGEABLE
Key,woodruff
5310-01-631-0010K18 INTERCHANGEABLE
Washer,flat
Parker Hannifin Corp Dba Pneutronics Div Aerospace Filtration Division
Cross-Reference Index
Part NumberManufacturer
000-8006-407 The Boeing Company Div Legacy Boeing Hb1 (USA)
K1-8 PRIMARY Allied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill (USA)
Related Parts
3120-00-343-0562INTERCHANGEABLE
BEARING,SLEEVE
21-400
5120-00-348-7652INTERCHANGEABLE
CONTACT POSITIONER,TERMINAL CRIM
K18
5945-00-510-0550INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5120-00-541-1808INTERCHANGEABLE
HOLDER,SHEET METAL,HOLE
04-M-1/8
4720-00-676-7936INTERCHANGEABLE
HOSE,NONMETALLIC
2556-6
5305-00-882-0821INTERCHANGEABLE
SCREW,SHOULDER
K18
5120-01-023-6511INTERCHANGEABLE
HOLDER,SHEET METAL,HOLE
K-1/8
5315-01-364-0838INTERCHANGEABLE
KEY,WOODRUFF
5310-01-631-0010INTERCHANGEABLE
WASHER,FLAT
K18

Frequently Asked Questions

What is NSN 4730-01-252-7428?

NSN 4730-01-252-7428 is a Adapter,straight,pipe to Tube, manufactured by Allied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-252-7428?

NSN 4730-01-252-7428 has 2 cross-referenced part numbers: 000-8006-407 (The Boeing Company Div Legacy Boeing Hb1), K1-8 (Allied Refrigeration Inc Dba Allied Refrigeration Inc Div Signal Hill).

What NSN replaces 4730-01-252-7428?

There are 9 known substitutes for 4730-01-252-7428: 3120-00-343-0562, 5120-00-348-7652, 5945-00-510-0550 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K1-8?

Key specifications for K1-8: Connection Type: THREADED INTERNAL PIPE SECOND END; Furnished Items and Quantity: 1 GASKET; Connection Style: FLARED (TUBE) FIRST END; Thread Series Designator: UNF FIRST END. 12 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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