PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

16504Seat,valve

Benton Div Ambac Industries Inc · NSN 4820-00-180-5207 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-180-5207 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-180-5207. Primary manufacturer part number: 16504.
Features
  • Seat,valve — FSC 4820
  • Under Flange Height: 0.410 INCHES NOMINAL IN
  • Hardness Rating: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
  • Style Designator: PLAIN FLANGED
  • Surface Treatment: PASSIVATE OVERALL
  • Material: STEEL COMP 440C OVERALL
  • Flange Seat to Disk End Height: 0.098 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
  • Body Outside Diameter: 0.557 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 440c Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-180-5207, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Benton Div Ambac Industries Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-180-5207
Primary Part Number16504
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerBenton Div Ambac Industries Inc
StatusACTIVE
Under Flange Height0.410 INCHES NOMINAL IN
Hardness Rating55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
Style DesignatorPLAIN FLANGED
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL COMP 440C OVERALL
Flange Seat to Disk End Height0.098 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
Body Outside Diameter0.557 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
Body Inside Diameter0.250 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Surface Treatment Document and ClassificationMIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Flange Diameter0.781 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5930-00-052-312916-504 INTERCHANGEABLE
Switch,sensitive
Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Illinois Tool Works
9540-00-231-9937 INTERCHANGEABLE
Beam,structural
9540-00-232-0076 INTERCHANGEABLE
Beam,structural
2530-00-405-419516-504 INTERCHANGEABLE
Arm,pivoting Wheel Spindle
Pdi Ground Support Systems, Inc.
5935-00-500-87482Z7390-58 INTERCHANGEABLE
Connector,receptacle,electrical
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5940-00-901-1405 INTERCHANGEABLE
Terminal,stud
5930-01-052-7295 INTERCHANGEABLE
Switch,sensitive
5305-01-274-258716504 INTERCHANGEABLE
Screw,cap,socket Head
Sps Technologies, Llc Dba PB Fasteners
5970-01-279-030016504 INTERCHANGEABLE
Insulator,switch
Itw Food Equipment Group Llc Dba Hobart Service
5120-01-428-803816504 INTERCHANGEABLE
Key,socket Head Screw
Eklind Tool Co
Cross-Reference Index
Part NumberManufacturer
16504 Benton Div Ambac Industries Inc (USA)
10161950 Us Army Aviation and Missile Command (USA)
Related Parts
5930-00-052-3129INTERCHANGEABLE
SWITCH,SENSITIVE
16-504
9540-00-231-9937INTERCHANGEABLE
BEAM,STRUCTURAL
9540-00-232-0076INTERCHANGEABLE
BEAM,STRUCTURAL
2530-00-405-4195INTERCHANGEABLE
ARM,PIVOTING WHEEL SPINDLE
16-504
5935-00-500-8748INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2Z7390-58
5940-00-901-1405INTERCHANGEABLE
TERMINAL,STUD
5930-01-052-7295INTERCHANGEABLE
SWITCH,SENSITIVE
5305-01-274-2587INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
16504
5970-01-279-0300INTERCHANGEABLE
INSULATOR,SWITCH
16504
5120-01-428-8038INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
16504
6515-01-589-7887INTERCHANGEABLE
RACK,BONE PLATING INSTRUMENTS
60.240.206

Frequently Asked Questions

What is NSN 4820-00-180-5207?

NSN 4820-00-180-5207 is a Seat,valve, manufactured by Benton Div Ambac Industries Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-180-5207?

NSN 4820-00-180-5207 has 2 cross-referenced part numbers: 16504 (Benton Div Ambac Industries Inc), 10161950 (Us Army Aviation and Missile Command).

What NSN replaces 4820-00-180-5207?

There are 11 known substitutes for 4820-00-180-5207: 5930-00-052-3129, 9540-00-231-9937, 9540-00-232-0076 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 16504?

Key specifications for 16504: Under Flange Height: 0.410 INCHES NOMINAL IN; Hardness Rating: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL; Style Designator: PLAIN FLANGED; Surface Treatment: PASSIVATE OVERALL. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com