PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K4551-2Trap,steam

Spirax Sarco Inc Dba Spirax Sarco · NSN 4730-00-032-1517 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-032-1517 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-032-1517. Primary manufacturer part number: K4551-2.
Features
  • Trap,steam — FSC 4730
  • Material: COPPER ALLOY BODY
  • Nondefinitive Spec/std Data: 2 CLASS
  • Rated Capacity at Maximum Working Pressure: 2600.000 POUNDS OF WATER PER HOUR LBS
  • Outlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT
  • Furnished Items: STRAINER
  • Inlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT
  • Body Design: ANGLE PATTERN
Applications
  • Applications requiring Copper Alloy Body construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-032-1517, 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. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 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
NSN4730-00-032-1517
Primary Part NumberK4551-2
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSpirax Sarco Inc Dba Spirax Sarco
StatusCANCELLED
MaterialCOPPER ALLOY BODY
Nondefinitive Spec/std Data2 CLASS
Rated Capacity at Maximum Working Pressure2600.000 POUNDS OF WATER PER HOUR LBS
Outlet Connection TypeGROUND JOINT TAILPIECE W/UNION NUT
Furnished ItemsSTRAINER
Inlet Connection TypeGROUND JOINT TAILPIECE W/UNION NUT
Body DesignANGLE PATTERN
MaterialSTEEL CORROSION RESISTING WORKING PARTS
Design TypeTHERMOSTATIC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5331-00-006-2382N0304 2-013 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
4820-00-064-742020137PC15-17T024 INTERCHANGEABLE
Seat,valve
Velan Valve Corp.
4730-00-232-8013 INTERCHANGEABLE
Trap,steam
4730-00-232-8024 INTERCHANGEABLE
Trap,steam
5310-00-245-86700441436A01 INTERCHANGEABLE
Washer,lock
Prestolite Electric Inc
4730-00-256-73011633-37-30PC135 INTERCHANGEABLE
Trap,steam
Spirax Sarco Inc Dba Spirax Sarco
4730-00-289-4616 INTERCHANGEABLE
Trap,steam
4730-00-289-4617 INTERCHANGEABLE
Trap,steam
4730-00-289-4619 INTERCHANGEABLE
Trap,steam
4820-00-405-5105 INTERCHANGEABLE
Valve,safety Relief
Cross-Reference Index
Part NumberManufacturer
K4551-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
K455-1-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
MILT2118 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
B34290 Spirax Sarco Inc Dba Spirax Sarco (USA)
J4551-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
M2118-G-1-N-O Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
20137 Velan Valve Corp. (USA)
J455-1-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
N194A1-2 Spirax Sarco Inc Dba Spirax Sarco (USA)
20114 Velan Valve Corp. (USA)
C34290 Spirax Sarco Inc Dba Spirax Sarco (USA)
J455 1/2IN Spirax Sarco Inc Dba Spirax Sarco (USA)
Related Parts
5331-00-006-2382INTERCHANGEABLE
O-RING
N0304 2-013
4820-00-064-7420INTERCHANGEABLE
SEAT,VALVE
20137PC15-17T024
4730-00-232-8013INTERCHANGEABLE
TRAP,STEAM
4730-00-232-8024INTERCHANGEABLE
TRAP,STEAM
5310-00-245-8670INTERCHANGEABLE
WASHER,LOCK
0441436A01
4730-00-256-7301INTERCHANGEABLE
TRAP,STEAM
1633-37-30PC135
4730-00-289-4616INTERCHANGEABLE
TRAP,STEAM
4730-00-289-4617INTERCHANGEABLE
TRAP,STEAM
4730-00-289-4619INTERCHANGEABLE
TRAP,STEAM
4820-00-405-5105INTERCHANGEABLE
VALVE,SAFETY RELIEF
5133-00-409-0392INTERCHANGEABLE
DRILL,TWIST
5950-00-498-2153INTERCHANGEABLE
TRANSFORMER,POWER,S
201-37

Frequently Asked Questions

What is NSN 4730-00-032-1517?

NSN 4730-00-032-1517 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 4730-00-032-1517?

NSN 4730-00-032-1517 has 12 cross-referenced part numbers: K4551-2 (Spirax Sarco Inc Dba Spirax Sarco), K455-1-2 (Spirax Sarco Inc Dba Spirax Sarco), MILT2118 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), B34290 (Spirax Sarco Inc Dba Spirax Sarco), J4551-2 (Spirax Sarco Inc Dba Spirax Sarco) and 7 more.

What NSN replaces 4730-00-032-1517?

There are 12 known substitutes for 4730-00-032-1517: 5331-00-006-2382, 4820-00-064-7420, 4730-00-232-8013 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K4551-2?

Key specifications for K4551-2: Material: COPPER ALLOY BODY; Nondefinitive Spec/std Data: 2 CLASS; Rated Capacity at Maximum Working Pressure: 2600.000 POUNDS OF WATER PER HOUR LBS; Outlet Connection Type: GROUND JOINT TAILPIECE W/UNION NUT. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-032-1517 still in active supply?

NSN 4730-00-032-1517 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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