PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21549Trap,steam

Spirax Sarco Inc Dba Spirax Sarco · NSN 4730-01-198-8457 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-198-8457 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-198-8457. Primary manufacturer part number: 21549.
Features
  • Trap,steam — FSC 4730
  • 3 verified cross-references
  • Primary manufacturer: Spirax Sarco Inc Dba Spirax Sarco
Applications
  • Plumbing and fluid distribution
  • Industrial piping systems
  • Fuel and lubricant distribution
General Description

The Trap,steam, cataloged under National Stock Number 4730-01-198-8457, 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 Spirax Sarco Inc Dba Spirax Sarco. This item has 3 commercial cross-references 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: Cancelled.

Technical Specifications
ParameterValue
NSN4730-01-198-8457
Primary Part Number21549
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSpirax Sarco Inc Dba Spirax Sarco
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
6610-00-939-261621549 INTERCHANGEABLE
Shaft Assy,rocking
Aerosonic Llc
4820-01-107-709421751 INTERCHANGEABLE
Valve,calibrated Flow
Kold-Ban International Ltd Div Kbi
5996-01-275-283321-549 INTERCHANGEABLE
Amplifier,magnetic
Radioshack Corporation Dba Radioshack
3040-01-317-749121549-1 INTERCHANGEABLE
Gearshaft Sector,spur
Aerosonic Llc
4730-01-396-5063 INTERCHANGEABLE
Reducer,boss
5935-01-414-582821549 INTERCHANGEABLE
Connector,receptacle,electrical
Viavi Solutionsllc
Cross-Reference Index
Part NumberManufacturer
21549 PRIMARY Spirax Sarco Inc Dba Spirax Sarco (USA)
J-447 PIECE 14 Spirax Sarco Inc Dba Spirax Sarco (USA)
N-100 1.25IPS Spirax Sarco Inc Dba Spirax Sarco (USA)
Related Parts
6610-00-939-2616INTERCHANGEABLE
SHAFT ASSY,ROCKING
21549
4820-01-107-7094INTERCHANGEABLE
VALVE,CALIBRATED FLOW
21751
5996-01-275-2833INTERCHANGEABLE
AMPLIFIER,MAGNETIC
21-549
3040-01-317-7491INTERCHANGEABLE
GEARSHAFT SECTOR,SPUR
21549-1
4730-01-396-5063INTERCHANGEABLE
REDUCER,BOSS
5935-01-414-5828INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
21549

Frequently Asked Questions

What is NSN 4730-01-198-8457?

NSN 4730-01-198-8457 is a Trap,steam, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-01-198-8457?

NSN 4730-01-198-8457 has 3 cross-referenced part numbers: 21549 (Spirax Sarco Inc Dba Spirax Sarco), J-447 PIECE 14 (Spirax Sarco Inc Dba Spirax Sarco), N-100 1.25IPS (Spirax Sarco Inc Dba Spirax Sarco).

What NSN replaces 4730-01-198-8457?

There are 6 known substitutes for 4730-01-198-8457: 6610-00-939-2616, 4820-01-107-7094, 5996-01-275-2833 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21549?

Key specifications for 21549: End Item Identification: JSN WHIDBEY ISLAND CLASS LSD. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-01-198-8457 still in active supply?

NSN 4730-01-198-8457 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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