PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121ATrap,steam

Hartford Compressors Inc · NSN 4730-00-517-8056 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-517-8056 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-517-8056. Primary manufacturer part number: 121A.
Features
  • Trap,steam — FSC 4730
  • Maximum Steam Working Pressure: ERR-060
  • Screw Thread Series Designator: NPT BOTH INLET AND OUTLET
  • Thread Direction: RIGHT-HAND BOTH INLET AND OUTLET
  • Outlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT AND FEMALE IRON PIPE
  • Inlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT AND FEMALE IRON PIPE
  • Material: COPPER ALLOY BODY
  • Rated Capacity at Maximum Working Pressure: 1300.000 POUNDS OF WATER PER HOUR LBS
Applications
  • Applications requiring Copper Alloy Body construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-517-8056, 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 Hartford Compressors Inc. 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-517-8056
Primary Part Number121A
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerHartford Compressors Inc
StatusCANCELLED
Maximum Steam Working PressureERR-060
Screw Thread Series DesignatorNPT BOTH INLET AND OUTLET
Thread DirectionRIGHT-HAND BOTH INLET AND OUTLET
Outlet Connection TypeGROUND JOINT TAILPIECE W/UNION NUT AND FEMALE IRON PIPE
Inlet Connection TypeGROUND JOINT TAILPIECE W/UNION NUT AND FEMALE IRON PIPE
MaterialCOPPER ALLOY BODY
Rated Capacity at Maximum Working Pressure1300.000 POUNDS OF WATER PER HOUR LBS
Design TypeTHERMOSTATIC
Body DesignANGLE PATTERN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6625-00-017-8669ME295U INTERCHANGEABLE
Analyzer,spectrum
Joint Electronics Type Designation System
4730-00-142-2160 INTERCHANGEABLE
Trap,steam
3110-00-156-669712 INTERCHANGEABLE
Bearing,ball,annular
Mcgill Manufacturing Co, Inc
4730-00-168-2033404317 INTERCHANGEABLE
Trap,steam
Itt Fluid Technology Corp Itt Mcdonnell and Miller
3110-00-191-8442121 INTERCHANGEABLE
Bearing,ball,annular
Hf Group Inc Dba Hf Group Inc
4730-00-223-3630 INTERCHANGEABLE
Trap,steam
4730-00-223-8038 INTERCHANGEABLE
Trap,steam
4730-00-231-3443404368 INTERCHANGEABLE
Trap,steam
Itt Fluid Technology Corp Itt Mcdonnell and Miller
4730-00-231-3453215 INTERCHANGEABLE
Trap,steam
Armstrong International Inc Dba Armstrong Machine Works
4730-00-232-800933-20169 INTERCHANGEABLE
Trap,steam
Itt Fluid Technology Corp Itt Mcdonnell and Miller
Cross-Reference Index
Part NumberManufacturer
121A PRIMARY Hartford Compressors Inc (USA)
9H3/4 Itt Fluid Technology Corp Itt Mcdonnell and Miller (USA)
WWT696 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
TH2A Hartford Compressors Inc (USA)
Related Parts
6625-00-017-8669INTERCHANGEABLE
ANALYZER,SPECTRUM
ME295U
4730-00-142-2160INTERCHANGEABLE
TRAP,STEAM
3110-00-156-6697INTERCHANGEABLE
BEARING,BALL,ANNULAR
12
4730-00-168-2033INTERCHANGEABLE
TRAP,STEAM
404317
3110-00-191-8442INTERCHANGEABLE
BEARING,BALL,ANNULAR
121
4730-00-223-3630INTERCHANGEABLE
TRAP,STEAM
4730-00-223-8038INTERCHANGEABLE
TRAP,STEAM
4730-00-231-3443INTERCHANGEABLE
TRAP,STEAM
404368
4730-00-231-3453INTERCHANGEABLE
TRAP,STEAM
215
4730-00-232-8009INTERCHANGEABLE
TRAP,STEAM
33-20169
4730-00-232-8012INTERCHANGEABLE
TRAP,STEAM
TYPEAHV-41
4730-00-232-8023INTERCHANGEABLE
TRAP,STEAM

Frequently Asked Questions

What is NSN 4730-00-517-8056?

NSN 4730-00-517-8056 is a Trap,steam, manufactured by Hartford Compressors Inc, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-517-8056?

NSN 4730-00-517-8056 has 4 cross-referenced part numbers: 121A (Hartford Compressors Inc), 9H3/4 (Itt Fluid Technology Corp Itt Mcdonnell and Miller), WWT696 (Federal Specifications Promulgated by General Services Administration Washington DC), TH2A (Hartford Compressors Inc).

What NSN replaces 4730-00-517-8056?

There are 12 known substitutes for 4730-00-517-8056: 6625-00-017-8669, 4730-00-142-2160, 3110-00-156-6697 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 121A?

Key specifications for 121A: Maximum Steam Working Pressure: ERR-060; Screw Thread Series Designator: NPT BOTH INLET AND OUTLET; Thread Direction: RIGHT-HAND BOTH INLET AND OUTLET; Outlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT AND FEMALE IRON PIPE. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-517-8056 still in active supply?

NSN 4730-00-517-8056 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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