PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HG273DSeat,valve

Wisconsin Motors, Llc · NSN 4820-00-776-8151 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-776-8151 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-776-8151. Primary manufacturer part number: HG273D.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: ANGULAR
  • Hardness Rating: 45.0 ROCKWELL C MAXIMUM FACE
  • Hardness Rating: 40.0 ROCKWELL C MINIMUM BODY
  • Body Outside Diameter: 1.377 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN
  • Body Inside Diameter: 1.123 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
  • Material: COBALT ALLOY BODY
  • Seat Angle in Deg: 0.750 NOMINAL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Cobalt Alloy Body construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-776-8151, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Wisconsin Motors, Llc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 11 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
NSN4820-00-776-8151
Primary Part NumberHG273D
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWisconsin Motors, Llc
StatusCANCELLED
Seating Surface ShapeANGULAR
Hardness Rating45.0 ROCKWELL C MAXIMUM FACE
Hardness Rating40.0 ROCKWELL C MINIMUM BODY
Body Outside Diameter1.377 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN
Body Inside Diameter1.123 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
MaterialCOBALT ALLOY BODY
Seat Angle in Deg0.750 NOMINAL
Style DesignatorPLAIN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-254-6443 INTERCHANGEABLE
Elbow,tube
5133-00-266-9476 INTERCHANGEABLE
Drill,twist
4730-00-277-5297 INTERCHANGEABLE
Reducer,hose
4820-00-432-123222238 INTERCHANGEABLE
Valve,safety Relief
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
4730-00-516-3290151138ALT11PC0 INTERCHANGEABLE
Elbow,hose
Naval Sea Systems Command
5815-00-547-7882SM-C-186901GP8 INTERCHANGEABLE
Teletypewriter Subassembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6105-00-643-076018547 INTERCHANGEABLE
Motor,direct Current
Way Wolff Associates Inc
1730-00-673-7408102132-1 INTERCHANGEABLE
Arm Assy
Air Logistics Corporation Dba Air Logistics Corp
6145-00-726-7254 INTERCHANGEABLE
Wire,electrical
2940-00-752-909317261A INTERCHANGEABLE
Filter Body,fluid
Brinkley Technology Group Llc Dba Hercules Manufacturing
Cross-Reference Index
Part NumberManufacturer
HG214D Wisconsin Motors, Llc (USA)
1DHG201D Fwd Seagrave Holdings Lp (USA)
DHG201D Fwd Seagrave Holdings Lp (USA)
18547 Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (USA)
FLHG201D Wiens Metal Products Inc Road Equipment Div (USA)
HG273D PRIMARY Wisconsin Motors, Llc (USA)
HG201D Wisconsin Motors, Llc (USA)
JHP110-39 Hollingsworth John R Co (USA)
D102GH Libby Power Systems, Llc (USA)
69499 C1 Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
CFN41279 Curtis Dyna-Fog, Ltd. (USA)
7768151 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
1021-321 Szemco Inc (USA)
JHP33-87 Hollingsworth John R Co (USA)
11-559 Thermo King Corporation Dba Phoenix Global Distirbution. (USA)
Related Parts
4730-00-254-6443INTERCHANGEABLE
ELBOW,TUBE
5133-00-266-9476INTERCHANGEABLE
DRILL,TWIST
4730-00-277-5297INTERCHANGEABLE
REDUCER,HOSE
4820-00-432-1232INTERCHANGEABLE
VALVE,SAFETY RELIEF
22238
4730-00-516-3290INTERCHANGEABLE
ELBOW,HOSE
151138ALT11PC0
5815-00-547-7882INTERCHANGEABLE
TELETYPEWRITER SUBASSEMBLY
SM-C-186901GP8
6105-00-643-0760INTERCHANGEABLE
MOTOR,DIRECT CURRENT
18547
1730-00-673-7408INTERCHANGEABLE
ARM ASSY
102132-1
6145-00-726-7254INTERCHANGEABLE
WIRE,ELECTRICAL
2940-00-752-9093INTERCHANGEABLE
FILTER BODY,FLUID
17261A
5110-00-806-1000INTERCHANGEABLE
FILE,HAND
5305-00-978-9772INTERCHANGEABLE
SETSCREW

Frequently Asked Questions

What is NSN 4820-00-776-8151?

NSN 4820-00-776-8151 is a Seat,valve, manufactured by Wisconsin Motors, Llc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-776-8151?

NSN 4820-00-776-8151 has 15 cross-referenced part numbers: HG214D (Wisconsin Motors, Llc), 1DHG201D (Fwd Seagrave Holdings Lp), DHG201D (Fwd Seagrave Holdings Lp), 18547 (Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.), FLHG201D (Wiens Metal Products Inc Road Equipment Div) and 10 more.

What NSN replaces 4820-00-776-8151?

There are 12 known substitutes for 4820-00-776-8151: 4730-00-254-6443, 5133-00-266-9476, 4730-00-277-5297 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HG273D?

Key specifications for HG273D: Seating Surface Shape: ANGULAR; Hardness Rating: 45.0 ROCKWELL C MAXIMUM FACE; Hardness Rating: 40.0 ROCKWELL C MINIMUM BODY; Body Outside Diameter: 1.377 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-776-8151 still in active supply?

NSN 4820-00-776-8151 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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