PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12377Coupling,pipe

Westerbeke Corporation · NSN 4730-01-212-0276 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-212-0276 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-212-0276. Primary manufacturer part number: 12377.
Features
  • Coupling,pipe — FSC 4730
  • Connection Type: THREADED INTERNAL PIPE ALL ENDS
  • Nominal Overall Length: 1.250 INCHES IN
  • Nominal Thread Size: 0.500 INCHES ALL ENDS IN
  • Connection Style: PLAIN (PIPE) ALL ENDS
  • Thread Series Designator: NPT ALL ENDS
  • Style Designator: PLAIN
  • Material: COPPER ALLOY OVERALL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Coupling,pipe, cataloged under National Stock Number 4730-01-212-0276, 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 Westerbeke Corporation. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN4730-01-212-0276
Primary Part Number12377
Item NameCoupling,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerWesterbeke Corporation
StatusACTIVE
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Nominal Overall Length1.250 INCHES IN
Nominal Thread Size0.500 INCHES ALL ENDS IN
Connection StylePLAIN (PIPE) ALL ENDS
Thread Series DesignatorNPT ALL ENDS
Style DesignatorPLAIN
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5305-00-191-6222 INTERCHANGEABLE
Screw,machine
6145-00-393-40758860 INTERCHANGEABLE
Cable,power,electrical
Janor Wire & Cable Corp
2915-00-441-990812-377 INTERCHANGEABLE
Lobe,pump,fuel
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
4820-00-622-681312377 INTERCHANGEABLE
Piston and Cup Assembly
Aerco International, Inc. Dba Aerco International Inc
5985-01-043-0141 INTERCHANGEABLE
Antenna
4820-01-186-8444N12377 INTERCHANGEABLE
Disk,nozzle Pin,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
2530-01-345-081512377 INTERCHANGEABLE
Piston,hydraulic Brake,master Cy
DP Manufacturing Inc.
6115-01-507-2426 INTERCHANGEABLE
Generator,alternating Current
6525-01-575-0673100-0877-01 INTERCHANGEABLE
Cover,foam Gasket Dust Assembly,
Minxray Inc
Cross-Reference Index
Part NumberManufacturer
12377 PRIMARY Westerbeke Corporation (USA)
Related Parts
5305-00-191-6222INTERCHANGEABLE
SCREW,MACHINE
6145-00-393-4075INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
8860
2915-00-441-9908INTERCHANGEABLE
LOBE,PUMP,FUEL
12-377
4820-00-622-6813INTERCHANGEABLE
PISTON AND CUP ASSEMBLY
12377
5985-01-043-0141INTERCHANGEABLE
ANTENNA
4820-01-186-8444INTERCHANGEABLE
DISK,NOZZLE PIN,VALVE
N12377
2530-01-345-0815INTERCHANGEABLE
PISTON,HYDRAULIC BRAKE,MASTER CY
12377
6115-01-507-2426INTERCHANGEABLE
GENERATOR,ALTERNATING CURRENT
6525-01-575-0673INTERCHANGEABLE
COVER,FOAM GASKET DUST ASSEMBLY,
100-0877-01

Frequently Asked Questions

What is NSN 4730-01-212-0276?

NSN 4730-01-212-0276 is a Coupling,pipe, manufactured by Westerbeke Corporation, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-212-0276?

NSN 4730-01-212-0276 has 1 cross-referenced part number: 12377 (Westerbeke Corporation).

What NSN replaces 4730-01-212-0276?

There are 9 known substitutes for 4730-01-212-0276: 5305-00-191-6222, 6145-00-393-4075, 2915-00-441-9908 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12377?

Key specifications for 12377: Connection Type: THREADED INTERNAL PIPE ALL ENDS; Nominal Overall Length: 1.250 INCHES IN; Nominal Thread Size: 0.500 INCHES ALL ENDS IN; Connection Style: PLAIN (PIPE) ALL ENDS. 7 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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