PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A51Trap,steam

Nicholson Steam Trap Inc · NSN 4730-00-841-8411 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-841-8411 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-841-8411. Primary manufacturer part number: A51.
Features
  • Trap,steam — FSC 4730
  • Body Design: ANGLE PATTERN
  • Material: STEEL CORROSION RESISTING WORKING PARTS
  • Design Type: CONTINUOUS FLOW
  • Outlet Connection Type: FEMALE IRON PIPE
  • Material: COPPER ALLOY BODY
  • Inlet Connection Type: FEMALE IRON PIPE
  • Thread Direction: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
Applications
  • Applications requiring Steel Corrosion Resisting Working Parts construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-841-8411, 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 Nicholson Steam Trap Inc. 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-841-8411
Primary Part NumberA51
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerNicholson Steam Trap Inc
StatusACTIVE
Body DesignANGLE PATTERN
MaterialSTEEL CORROSION RESISTING WORKING PARTS
Design TypeCONTINUOUS FLOW
Outlet Connection TypeFEMALE IRON PIPE
MaterialCOPPER ALLOY BODY
Inlet Connection TypeFEMALE IRON PIPE
Thread DirectionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5975-00-290-4085142AL INTERCHANGEABLE
Locknut,electrical Conduit
Abb Installation Products Inc
5950-00-432-5933A51 INTERCHANGEABLE
Transformer,power
B G Laboratories Inc.
3030-00-529-0352 INTERCHANGEABLE
Belt,v
3030-00-565-752666-2790A INTERCHANGEABLE
Belt,v
Ametek Inc Heat Transfer Div
4730-01-274-4826F117-005 INTERCHANGEABLE
Nozzle,sand Blast
Virgo Products Distribution Div Connie S. Trogdon
6350-01-695-7688A51 INTERCHANGEABLE
Receiver,alarm
Ascom (us) Inc.
Cross-Reference Index
Part NumberManufacturer
A51 PRIMARY Nicholson Steam Trap Inc (USA)
Related Parts
5975-00-290-4085INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
142AL
5950-00-432-5933INTERCHANGEABLE
TRANSFORMER,POWER
A51
3030-00-529-0352INTERCHANGEABLE
BELT,V
3030-00-565-7526INTERCHANGEABLE
BELT,V
66-2790A
4730-01-274-4826INTERCHANGEABLE
NOZZLE,SAND BLAST
F117-005
6350-01-695-7688INTERCHANGEABLE
RECEIVER,ALARM
A51

Frequently Asked Questions

What is NSN 4730-00-841-8411?

NSN 4730-00-841-8411 is a Trap,steam, manufactured by Nicholson Steam Trap Inc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-841-8411?

NSN 4730-00-841-8411 has 1 cross-referenced part number: A51 (Nicholson Steam Trap Inc).

What NSN replaces 4730-00-841-8411?

There are 6 known substitutes for 4730-00-841-8411: 5975-00-290-4085, 5950-00-432-5933, 3030-00-529-0352 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A51?

Key specifications for A51: Body Design: ANGLE PATTERN; Material: STEEL CORROSION RESISTING WORKING PARTS; Design Type: CONTINUOUS FLOW; Outlet Connection Type: FEMALE IRON PIPE. 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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