PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

656Trap,steam

Itt Fluid Technology Corp Itt Mcdonnell and Miller · NSN 4730-00-991-2920 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-991-2920 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-991-2920. Primary manufacturer part number: 656.
Features
  • Trap,steam — FSC 4730
  • Body Design: STRAIGHT PATTERN
  • Thread Direction: RIGHT-HAND BOTH INLET AND OUTLET
  • Inlet Connection Type: FEMALE IRON PIPE
  • Maximum Steam Working Pressure: ERR-060
  • Design Type: THERMOSTATIC
  • Material: STEEL VALVE HEAD
  • Outlet Connection Type: FEMALE IRON PIPE
Applications
  • Applications requiring Steel Valve Head construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-991-2920, 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 Itt Fluid Technology Corp Itt Mcdonnell and Miller. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-991-2920
Primary Part Number656
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerItt Fluid Technology Corp Itt Mcdonnell and Miller
StatusCANCELLED
Body DesignSTRAIGHT PATTERN
Thread DirectionRIGHT-HAND BOTH INLET AND OUTLET
Inlet Connection TypeFEMALE IRON PIPE
Maximum Steam Working PressureERR-060
Design TypeTHERMOSTATIC
MaterialSTEEL VALVE HEAD
Outlet Connection TypeFEMALE IRON PIPE
MaterialSTEEL CORROSION RESISTING WORKING PARTS
MaterialSTEEL BODY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5960-00-023-9468 INTERCHANGEABLE
Electron Tube
5120-00-289-05345120-00-289-0534 INTERCHANGEABLE
Wrench,tap and Reamer
General Services Administration Federal Supply Service
Cross-Reference Index
Part NumberManufacturer
TD50 Spirax Sarco Inc Dba Spirax Sarco (USA)
TD50-1-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
FD-1 1/2 The Clark-Eliance Corp (USA)
656 PRIMARY Itt Fluid Technology Corp Itt Mcdonnell and Miller (USA)
Related Parts
5960-00-023-9468INTERCHANGEABLE
ELECTRON TUBE
5120-00-289-0534INTERCHANGEABLE
WRENCH,TAP AND REAMER
5120-00-289-0534

Frequently Asked Questions

What is NSN 4730-00-991-2920?

NSN 4730-00-991-2920 is a Trap,steam, manufactured by Itt Fluid Technology Corp Itt Mcdonnell and Miller, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-991-2920?

NSN 4730-00-991-2920 has 4 cross-referenced part numbers: TD50 (Spirax Sarco Inc Dba Spirax Sarco), TD50-1-2 (Spirax Sarco Inc Dba Spirax Sarco), FD-1 1/2 (The Clark-Eliance Corp), 656 (Itt Fluid Technology Corp Itt Mcdonnell and Miller).

What NSN replaces 4730-00-991-2920?

There are 2 known substitutes for 4730-00-991-2920: 5960-00-023-9468, 5120-00-289-0534. Verify interchangeability with system specifications before substitution.

What are the specifications of 656?

Key specifications for 656: Body Design: STRAIGHT PATTERN; Thread Direction: RIGHT-HAND BOTH INLET AND OUTLET; Inlet Connection Type: FEMALE IRON PIPE; Maximum Steam Working Pressure: ERR-060. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-991-2920 still in active supply?

NSN 4730-00-991-2920 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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