PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G16861PC56Packing Nut

Siemens Energy, Inc. · NSN 4730-00-274-3380 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-274-3380 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-274-3380. Primary manufacturer part number: G16861PC56.
Features
  • Packing Nut — FSC 4730
  • 31 verified cross-references
  • Primary manufacturer: Siemens Energy, Inc.
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Packing Nut, cataloged under National Stock Number 4730-00-274-3380, 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 Siemens Energy, Inc.. This item has 31 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NamePacking Nut
FSC / FSG4730 — No Item Name Available (FSG 47)
ManufacturersSiemens Energy, Inc. (CAGE 16712); Naval Ship Systems Command (CAGE 80064); Ships Parts Inc (CAGE 64177); Circor Pumps North America Llc (CAGE 59180)
Technical Specifications
ParameterValue
NSN4730-00-274-3380
Primary Part NumberG16861PC56
Item NamePacking Nut
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSiemens Energy, Inc.
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5330-00-212-6432G10540PC57 INTERCHANGEABLE
Retainer,packing
Siemens Energy, Inc.
4730-00-246-5411HC-29N/0221 INTERCHANGEABLE
Flange,pipe
Siemens Energy, Inc.
2825-00-337-0997HC-151D/1113 INTERCHANGEABLE
Cover,valve Body
Siemens Energy, Inc.
2825-00-383-6350HC1804FX1ANDHC215AEX1 INTERCHANGEABLE
Box,packing with Bu
Siemens Energy, Inc.
4730-01-022-3946H-3373 PIECE 007B INTERCHANGEABLE
Flange,pipe
Siemens Energy, Inc.
2825-01-182-4519S3202A INTERCHANGEABLE
Packing Box Assembly
Circor Pumps North America Llc
4730-01-182-4521G10322PC48 INTERCHANGEABLE
Plug,nozzle
Siemens Energy, Inc.
2825-01-182-4522HC-1819A INTERCHANGEABLE
Yoke,turbine
Siemens Energy, Inc.
2825-01-182-4523G10069PC63 INTERCHANGEABLE
Yoke,turbine
Siemens Energy, Inc.
4730-01-183-0666HC-561E/2695 INTERCHANGEABLE
Plug,nozzle
Siemens Energy, Inc.
Cross-Reference Index
Part NumberManufacturer
G16861PC56 PRIMARY Siemens Energy, Inc. (USA)
S3213C Siemens Energy, Inc. (USA)
G8899PC56 PRIMARY Siemens Energy, Inc. (USA)
G8883PC56 PRIMARY Siemens Energy, Inc. (USA)
G10540PC56 PRIMARY Siemens Energy, Inc. (USA)
G8730PC56 PRIMARY Siemens Energy, Inc. (USA)
LST1153S4501-719431PC56 Naval Ship Systems Command (USA)
H-3373 Siemens Energy, Inc. (USA)
G15170PC58 PRIMARY Siemens Energy, Inc. (USA)
G8714PC56 PRIMARY Siemens Energy, Inc. (USA)
G10542PC56 PRIMARY Siemens Energy, Inc. (USA)
G8892PC56 PRIMARY Siemens Energy, Inc. (USA)
LST1153S4501-719433PC56 Naval Ship Systems Command (USA)
SPI-HC-112D Ships Parts Inc (USA)
H3163918REVAPC56 Naval Ship Systems Command (USA)
S3213C Circor Pumps North America Llc (USA)
G8890PC56 PRIMARY Siemens Energy, Inc. (USA)
SS5501-413170PC56 Naval Ship Systems Command (USA)
G15172PC58 PRIMARY Siemens Energy, Inc. (USA)
G8897PC56 PRIMARY Siemens Energy, Inc. (USA)
Related Parts
5330-00-212-6432INTERCHANGEABLE
RETAINER,PACKING
G10540PC57
4730-00-246-5411INTERCHANGEABLE
FLANGE,PIPE
HC-29N/0221
2825-00-337-0997INTERCHANGEABLE
COVER,VALVE BODY
HC-151D/1113
2825-00-383-6350INTERCHANGEABLE
BOX,PACKING WITH BU
HC1804FX1ANDHC215AEX1
4730-01-022-3946INTERCHANGEABLE
FLANGE,PIPE
H-3373 PIECE 007B
2825-01-182-4519INTERCHANGEABLE
PACKING BOX ASSEMBLY
S3202A
4730-01-182-4521INTERCHANGEABLE
PLUG,NOZZLE
G10322PC48
2825-01-182-4522INTERCHANGEABLE
YOKE,TURBINE
HC-1819A
2825-01-182-4523INTERCHANGEABLE
YOKE,TURBINE
G10069PC63
4730-01-183-0666INTERCHANGEABLE
PLUG,NOZZLE
HC-561E/2695
2825-01-183-0667INTERCHANGEABLE
RING,PACKING BOX
HC-111A
2825-01-183-0672INTERCHANGEABLE
COVER,TURBINE CASE
S3260AX1

Frequently Asked Questions

What is NSN 4730-00-274-3380?

NSN 4730-00-274-3380 is a Packing Nut, manufactured by Siemens Energy, Inc., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-274-3380?

NSN 4730-00-274-3380 has 31 cross-referenced part numbers: G16861PC56 (Siemens Energy, Inc.), S3213C (Siemens Energy, Inc.), G8899PC56 (Siemens Energy, Inc.), G8883PC56 (Siemens Energy, Inc.), G10540PC56 (Siemens Energy, Inc.) and 26 more.

What NSN replaces 4730-00-274-3380?

There are 12 known substitutes for 4730-00-274-3380: 5330-00-212-6432, 4730-00-246-5411, 2825-00-337-0997 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 4730-00-274-3380 still in active supply?

NSN 4730-00-274-3380 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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