PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

502Trap,steam

Desco Corp Marsh Bellofram Div · NSN 4730-00-058-4869 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-058-4869 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-058-4869. Primary manufacturer part number: 502.
Features
  • Trap,steam — FSC 4730
  • Outlet Connection Type: FEMALE IRON PIPE AND MALE IRON PIPE
  • Inlet Connection Type: FEMALE IRON PIPE AND MALE IRON PIPE
  • Material: NICKEL ALLOY VALVE SEAT
  • Rated Capacity at Maximum Working Pressure: 830.0 POUNDS OF WATER PER HOUR LBS
  • Material: COPPER ALLOY BODY
  • Design Type: THERMOSTATIC
  • Screw Thread Series Designator: NPT BOTH INLET AND OUTLET
Applications
  • Applications requiring Nickel Alloy Valve Seat construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-058-4869, 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 Desco Corp Marsh Bellofram Div. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-058-4869
Primary Part Number502
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerDesco Corp Marsh Bellofram Div
StatusACTIVE
Outlet Connection TypeFEMALE IRON PIPE AND MALE IRON PIPE
Inlet Connection TypeFEMALE IRON PIPE AND MALE IRON PIPE
MaterialNICKEL ALLOY VALVE SEAT
Rated Capacity at Maximum Working Pressure830.0 POUNDS OF WATER PER HOUR LBS
MaterialCOPPER ALLOY BODY
Design TypeTHERMOSTATIC
Screw Thread Series DesignatorNPT BOTH INLET AND OUTLET
Body DesignANGLE PATTERN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5330-00-018-5526F6U01002 INTERCHANGEABLE
Gasket Set
Sealcraft Corporation
4730-00-097-135850212 INTERCHANGEABLE
Bolt,fluid Passage
The Hamilton Caster & Mfg. Company
5950-00-146-4817 INTERCHANGEABLE
Transformer,power,vibrator
5330-00-298-692350150 INTERCHANGEABLE
Seal,plain Encased
Viking Technologies, Ltd.
2530-00-653-75856537585 INTERCHANGEABLE
Brake Band and Lining
Army, United States Department of the Dba Rock Island Arsenal Jmtc
4330-00-698-402550158 INTERCHANGEABLE
Filter Element,fluid
Arvinmeritor Inc
5340-00-889-951550212 INTERCHANGEABLE
Mount,resilient,utility
Lanxess Corporation
5995-01-672-580150212 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Cables to Go
1010-01-715-016150212 INTERCHANGEABLE
Breech Mechanism
O F Mossberg & Sons Inc
Cross-Reference Index
Part NumberManufacturer
502 Desco Corp Marsh Bellofram Div (USA)
502 1/2 Desco Corp Marsh Bellofram Div (USA)
Related Parts
5330-00-018-5526INTERCHANGEABLE
GASKET SET
F6U01002
4730-00-097-1358INTERCHANGEABLE
BOLT,FLUID PASSAGE
50212
5950-00-146-4817INTERCHANGEABLE
TRANSFORMER,POWER,VIBRATOR
5330-00-298-6923INTERCHANGEABLE
SEAL,PLAIN ENCASED
50150
2530-00-653-7585INTERCHANGEABLE
BRAKE BAND AND LINING
6537585
4330-00-698-4025INTERCHANGEABLE
FILTER ELEMENT,FLUID
50158
5340-00-889-9515INTERCHANGEABLE
MOUNT,RESILIENT,UTILITY
50212
5995-01-672-5801INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
50212
1010-01-715-0161INTERCHANGEABLE
BREECH MECHANISM
50212

Frequently Asked Questions

What is NSN 4730-00-058-4869?

NSN 4730-00-058-4869 is a Trap,steam, manufactured by Desco Corp Marsh Bellofram Div, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-058-4869?

NSN 4730-00-058-4869 has 2 cross-referenced part numbers: 502 (Desco Corp Marsh Bellofram Div), 502 1/2 (Desco Corp Marsh Bellofram Div).

What NSN replaces 4730-00-058-4869?

There are 9 known substitutes for 4730-00-058-4869: 5330-00-018-5526, 4730-00-097-1358, 5950-00-146-4817 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 502?

Key specifications for 502: Outlet Connection Type: FEMALE IRON PIPE AND MALE IRON PIPE; Inlet Connection Type: FEMALE IRON PIPE AND MALE IRON PIPE; Material: NICKEL ALLOY VALVE SEAT; Rated Capacity at Maximum Working Pressure: 830.0 POUNDS OF WATER PER HOUR LBS. 8 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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