PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-1551Adapter,straight,pipe to Tube

Mueller Brass Co. · NSN 4730-00-481-2405 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-481-2405 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-481-2405. Primary manufacturer part number: A-1551.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN
  • Connection Type: UNTHREADED INTERNAL TUBE FIRST END
  • Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN
  • Material Document and Classification: ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Nominal Overall Length: 1.620 INCHES IN
  • Connection Style: SOCKET (TUBE) FIRST END
  • Nominal Thread Size: 0.750 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-481-2405, 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 Mueller Brass Co.. Government technical data includes 12 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-481-2405
Primary Part NumberA-1551
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusACTIVE
Nominal Pipe Size Accommodated0.750 INCHES SECOND END IN
Connection TypeUNTHREADED INTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated0.750 INCHES FIRST END IN
Material Document and ClassificationASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nominal Overall Length1.620 INCHES IN
Connection StyleSOCKET (TUBE) FIRST END
Nominal Thread Size0.750 INCHES SECOND END IN
Connection StylePLAIN (PIPE) SECOND END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Thread Series DesignatorNPT SECOND END
Tubing Wall Nominal Thickness for Which Designed0.035 INCHES FIRST END IN
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5365-00-354-7040 INTERCHANGEABLE
Spacer,ring
4820-00-516-8297A155-1 INTERCHANGEABLE
Valve,bleeder,hydraulic System
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
6150-00-774-3527A1551 INTERCHANGEABLE
Wiring Harness
Am General Llc
5930-00-842-0609207573-1 INTERCHANGEABLE
Adapter,switch Actuator
Honeywell International Inc. Dba Honeyweel Sensing & Controls
6685-01-089-803804477-01 INTERCHANGEABLE
Transmitter,pressure
General Dynamics Motion Control Llc
5998-01-112-01878948-3020 INTERCHANGEABLE
Extender Card,electronic Test
L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications
4730-01-614-5591500123 INTERCHANGEABLE
Elbow,tube
Oshkosh Aerotech, Llc Div Jetway Systems
8455-01-682-6104 INTERCHANGEABLE
Insignia,shoulder Sleeve
8455-01-689-6909 INTERCHANGEABLE
Insignia,shoulder Sleeve
8455-01-700-3581 INTERCHANGEABLE
Insignia,shoulder Sleeve
Cross-Reference Index
Part NumberManufacturer
A-1551 PRIMARY Mueller Brass Co. (USA)
11241332 Ballistic Missile Defense Systems Command (USA)
5001-23 Raytheon Company Div Rmd Strategic (USA)
11241332-3 Ballistic Missile Defense Systems Command (USA)
Related Parts
5365-00-354-7040INTERCHANGEABLE
SPACER,RING
4820-00-516-8297INTERCHANGEABLE
VALVE,BLEEDER,HYDRAULIC SYSTEM
A155-1
6150-00-774-3527INTERCHANGEABLE
WIRING HARNESS
A1551
5930-00-842-0609INTERCHANGEABLE
ADAPTER,SWITCH ACTUATOR
207573-1
6685-01-089-8038INTERCHANGEABLE
TRANSMITTER,PRESSURE
04477-01
5998-01-112-0187INTERCHANGEABLE
EXTENDER CARD,ELECTRONIC TEST
8948-3020
4730-01-614-5591INTERCHANGEABLE
ELBOW,TUBE
500123
8455-01-682-6104INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-689-6909INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-700-3581INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE

Frequently Asked Questions

What is NSN 4730-00-481-2405?

NSN 4730-00-481-2405 is a Adapter,straight,pipe to Tube, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-481-2405?

NSN 4730-00-481-2405 has 4 cross-referenced part numbers: A-1551 (Mueller Brass Co.), 11241332 (Ballistic Missile Defense Systems Command), 5001-23 (Raytheon Company Div Rmd Strategic), 11241332-3 (Ballistic Missile Defense Systems Command).

What NSN replaces 4730-00-481-2405?

There are 10 known substitutes for 4730-00-481-2405: 5365-00-354-7040, 4820-00-516-8297, 6150-00-774-3527 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A-1551?

Key specifications for A-1551: Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN; Connection Type: UNTHREADED INTERNAL TUBE FIRST END; Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN; Material Document and Classification: ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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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