PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1581AElbow,pipe to Hose

R.w. Fernstrum & Company · NSN 4730-00-305-9783 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-305-9783 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-305-9783. Primary manufacturer part number: 1581A.
Features
  • Elbow,pipe to Hose — FSC 4730
  • Connection Type: THREADED INTERNAL PIPE FIRST END
  • Connection Style: PLAIN (PIPE) FIRST END
  • Connection Style: BEADED HOSE SECOND END
  • Leg Length: 2.250 INCHES NOMINAL SECOND END IN
  • Nominal Thread Size: 1.000 INCHES FIRST END IN
  • Connection Type: UNTHREADED EXTERNAL HOSE SECOND END
  • Nominal Inside Diameter Hose Accommodated: 1.000 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Elbow,pipe to Hose, cataloged under National Stock Number 4730-00-305-9783, 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 R.w. Fernstrum & Company. Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-305-9783
Primary Part Number1581A
Item NameElbow,pipe to Hose
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerR.w. Fernstrum & Company
StatusACTIVE
Connection TypeTHREADED INTERNAL PIPE FIRST END
Connection StylePLAIN (PIPE) FIRST END
Connection StyleBEADED HOSE SECOND END
Leg Length2.250 INCHES NOMINAL SECOND END IN
Nominal Thread Size1.000 INCHES FIRST END IN
Connection TypeUNTHREADED EXTERNAL HOSE SECOND END
Nominal Inside Diameter Hose Accommodated1.000 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Leg Length1.125 INCHES NOMINAL FIRST END IN
Thread Series DesignatorNPT FIRST END
Flow Angle105.0 DEGREES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5910-00-062-3567158-0001-001 INTERCHANGEABLE
Capacitor,variable,air Dielectri
Viking Technologies, Ltd.
5330-00-066-8430 INTERCHANGEABLE
Seal,oil
5305-00-143-0630 INTERCHANGEABLE
Screw,machine
9390-00-250-0816 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
5940-00-269-806422B7463ITEM43 INTERCHANGEABLE
Terminal,stud
Westinghouse Electric Corp
5360-00-470-35331581 INTERCHANGEABLE
Spring
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
5315-00-664-49930048291 INTERCHANGEABLE
Pin,grooved,headless
New Holland Construction
5930-00-755-3316S6135-20388-0 INTERCHANGEABLE
Switch,pressure
Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
5910-00-794-316715-81 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Keysight Technologies Inc
5815-00-859-660901581 INTERCHANGEABLE
Armature
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
Cross-Reference Index
Part NumberManufacturer
1581A PRIMARY R.w. Fernstrum & Company (USA)
1581 H20 Tank Inc U S Motors Div (USA)
Related Parts
5910-00-062-3567INTERCHANGEABLE
CAPACITOR,VARIABLE,AIR DIELECTRI
158-0001-001
5330-00-066-8430INTERCHANGEABLE
SEAL,OIL
5305-00-143-0630INTERCHANGEABLE
SCREW,MACHINE
9390-00-250-0816INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
5940-00-269-8064INTERCHANGEABLE
TERMINAL,STUD
22B7463ITEM43
5360-00-470-3533INTERCHANGEABLE
SPRING
1581
5315-00-664-4993INTERCHANGEABLE
PIN,GROOVED,HEADLESS
0048291
5930-00-755-3316INTERCHANGEABLE
SWITCH,PRESSURE
S6135-20388-0
5910-00-794-3167INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
15-81
5815-00-859-6609INTERCHANGEABLE
ARMATURE
01581
2940-00-892-6210INTERCHANGEABLE
FILTER ELEMENT,FLUID
170200
6240-00-954-5484INTERCHANGEABLE
LAMP,INCANDESCENT
4416R

Frequently Asked Questions

What is NSN 4730-00-305-9783?

NSN 4730-00-305-9783 is a Elbow,pipe to Hose, manufactured by R.w. Fernstrum & Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-305-9783?

NSN 4730-00-305-9783 has 2 cross-referenced part numbers: 1581A (R.w. Fernstrum & Company), 1581 (H20 Tank Inc U S Motors Div).

What NSN replaces 4730-00-305-9783?

There are 12 known substitutes for 4730-00-305-9783: 5910-00-062-3567, 5330-00-066-8430, 5305-00-143-0630 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1581A?

Key specifications for 1581A: Connection Type: THREADED INTERNAL PIPE FIRST END; Connection Style: PLAIN (PIPE) FIRST END; Connection Style: BEADED HOSE SECOND END; Leg Length: 2.250 INCHES NOMINAL SECOND END IN. 11 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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