PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6820Nut,union

Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division · NSN 4730-01-418-4126 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-418-4126 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-418-4126. Primary manufacturer part number: 6820.
Features
  • Nut,union — FSC 4730
  • Material: COPPER ALLOY 836 OVERALL
  • Material Document and Classification: QQ-C-390B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Temp Rating: 160.0 FAHRENHEIT NOMINAL DEGF
  • Maximum Working Pressure Rating and Service for Which Designed: 150.0 POUNDS PER SQUARE INCH (PSI) WATER LBS
  • 3 verified cross-references
  • Primary manufacturer: Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 836 Overall construction
General Description

The Nut,union, cataloged under National Stock Number 4730-01-418-4126, 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 Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-418-4126
Primary Part Number6820
Item NameNut,union
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerRomac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
StatusACTIVE
MaterialCOPPER ALLOY 836 OVERALL
Material Document and ClassificationQQ-C-390B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Temp Rating160.0 FAHRENHEIT NOMINAL DEGF
Maximum Working Pressure Rating and Service for Which Designed150.0 POUNDS PER SQUARE INCH (PSI) WATER LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-174-0315131-56820 INTERCHANGEABLE
Cock,shutoff,screw Stem
Danfoss Power Solutions II, Llc
4730-00-278-2523 INTERCHANGEABLE
Clamp,hose
2530-00-495-8594J812678 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Chrysler Corp Engine and Components Sales Diversified Products Div
8115-00-682-68206820 INTERCHANGEABLE
Box,shipping
Connecticut Container Corp. Dba Connecticut Container Corp
5305-00-687-75586820 INTERCHANGEABLE
Screw,machine
Cec Vibration Products, Llc Dba Cec Vibrations Products
6515-01-069-7061S1658-2 INTERCHANGEABLE
Cautery,battery Operated
Bausch & Lomb Incorporated Div Surgical
5950-01-075-95543455039-008 INTERCHANGEABLE
Coil,radio Frequency
Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
2510-01-179-262922003060 INTERCHANGEABLE
Shock Absorber,direct Action
General Motors Llc Dba General Motors Llc
2920-01-184-058112043733 INTERCHANGEABLE
Lead Set,ignition,engine
General Motors Llc Dba General Motors Llc
6530-01-283-65396820 INTERCHANGEABLE
Tube Assembly,respiratory Therap
Bird Products Corp
Cross-Reference Index
Part NumberManufacturer
2764-C ITEM 5 General Electric Co Hotpoint Co (USA)
6820 PRIMARY Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
1691-B ITEM 5 Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
Related Parts
4820-00-174-0315INTERCHANGEABLE
COCK,SHUTOFF,SCREW STEM
131-56820
4730-00-278-2523INTERCHANGEABLE
CLAMP,HOSE
2530-00-495-8594INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
J812678
8115-00-682-6820INTERCHANGEABLE
BOX,SHIPPING
6820
5305-00-687-7558INTERCHANGEABLE
SCREW,MACHINE
6820
6515-01-069-7061INTERCHANGEABLE
CAUTERY,BATTERY OPERATED
S1658-2
5950-01-075-9554INTERCHANGEABLE
COIL,RADIO FREQUENCY
3455039-008
2510-01-179-2629INTERCHANGEABLE
SHOCK ABSORBER,DIRECT ACTION
22003060
2920-01-184-0581INTERCHANGEABLE
LEAD SET,IGNITION,ENGINE
12043733
6530-01-283-6539INTERCHANGEABLE
TUBE ASSEMBLY,RESPIRATORY THERAP
6820
8120-01-329-1500INTERCHANGEABLE
CYLINDER,COMPRESSED GAS,AIR,BREA
1690360
6515-01-465-8861INTERCHANGEABLE
MASK,ORONASAL
VSI6820

Frequently Asked Questions

What is NSN 4730-01-418-4126?

NSN 4730-01-418-4126 is a Nut,union, manufactured by Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-418-4126?

NSN 4730-01-418-4126 has 3 cross-referenced part numbers: 2764-C ITEM 5 (General Electric Co Hotpoint Co), 6820 (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division), 1691-B ITEM 5 (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division).

What NSN replaces 4730-01-418-4126?

There are 12 known substitutes for 4730-01-418-4126: 4820-00-174-0315, 4730-00-278-2523, 2530-00-495-8594 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6820?

Key specifications for 6820: Material: COPPER ALLOY 836 OVERALL; Material Document and Classification: QQ-C-390B FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Temp Rating: 160.0 FAHRENHEIT NOMINAL DEGF; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 5 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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