PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1787809PC5Nut,tube Coupling

Lenz Inc Dba the Lenz Company · NSN 4730-00-678-9723 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-678-9723 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-678-9723. Primary manufacturer part number: 1787809PC5.
Features
  • Nut,tube Coupling — FSC 4730
  • Fabrication Method: MACHINED
  • Length to Shoulder: 0.594 INCHES NOMINAL IN
  • Material: STEEL COMP 1212 OR STEEL COMP 1118 OVERALL
  • Surface Treatment Document and Classification: MIL-C-16232,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: PHOSPHATE OVERALL
  • Material Document and Classification: QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
  • Thread Class: 2B
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Fluid conveyance
  • Hydraulic system plumbing
General Description

The Nut,tube Coupling, cataloged under National Stock Number 4730-00-678-9723, 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 Lenz Inc Dba the Lenz Company. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 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
NSN4730-00-678-9723
Primary Part Number1787809PC5
Item NameNut,tube Coupling
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerLenz Inc Dba the Lenz Company
StatusACTIVE
Fabrication MethodMACHINED
Length to Shoulder0.594 INCHES NOMINAL IN
MaterialSTEEL COMP 1212 OR STEEL COMP 1118 OVERALL
Surface Treatment Document and ClassificationMIL-C-16232,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPHOSPHATE OVERALL
Material Document and ClassificationQQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
Thread Class2B
Thread SeriesUNF
Thread Quantity Per Inch14
Nut StyleTUBE COUPLING
Nominal Thread Size0.875 INCHES IN
Width Across Flats1.000 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Smallest Inside Diameter0.531 INCHES NOMINAL IN
Nut Height0.906 INCHES NOMINAL IN
Nominal Tube Outside Diameter0.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-011-3177 INTERCHANGEABLE
Plug,pipe
5310-00-053-780882218 INTERCHANGEABLE
Nut,self-Locking,single Ball Sea
Hayes Wheels Intl Inc Akron Opns
5306-00-166-140620-58 INTERCHANGEABLE
Bolt,carriage
Motorola Automotive Electronics
5315-00-198-59872058 INTERCHANGEABLE
Pin,tapered,plain
Bath Iron Works Corporation
5305-00-292-892512-1-12 INTERCHANGEABLE
Screw,cap,hexagon Head
Trailmobile Inc Sub of the Pullman Co
4730-00-489-8202 INTERCHANGEABLE
Elbow,pipe to Tube
5945-00-759-79982058 INTERCHANGEABLE
Relay,electromagnetic
Dne Technologies, Inc
7025-01-026-87622058 INTERCHANGEABLE
Kit Assembly,stand
Hamilton Sundstrand Corporation Dba Collins Aerospace
3460-01-166-76469-2058 INTERCHANGEABLE
Key,drill Chuck
Sears, Roebuck and Co. Dba Sears Div Sears Commercial
2590-01-204-9797 INTERCHANGEABLE
Control Assembly,push-Pull
Cross-Reference Index
Part NumberManufacturer
1787809PC5 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
205-8 Lenz Inc Dba the Lenz Company (USA)
1787809 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
1787809PC5 PRIMARY Lenz Inc Dba the Lenz Company (USA)
205 Lenz Inc Dba the Lenz Company (USA)
Related Parts
4730-00-011-3177INTERCHANGEABLE
PLUG,PIPE
5310-00-053-7808INTERCHANGEABLE
NUT,SELF-LOCKING,SINGLE BALL SEA
82218
5306-00-166-1406INTERCHANGEABLE
BOLT,CARRIAGE
20-58
5315-00-198-5987INTERCHANGEABLE
PIN,TAPERED,PLAIN
2058
5305-00-292-8925INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
12-1-12
4730-00-489-8202INTERCHANGEABLE
ELBOW,PIPE TO TUBE
5945-00-759-7998INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
2058
7025-01-026-8762INTERCHANGEABLE
KIT ASSEMBLY,STAND
2058
3460-01-166-7646INTERCHANGEABLE
KEY,DRILL CHUCK
9-2058
2590-01-204-9797INTERCHANGEABLE
CONTROL ASSEMBLY,PUSH-PULL
5945-01-301-4810INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
2058
3120-01-351-7784INTERCHANGEABLE
BUSHING,SLEEVE
205-8

Frequently Asked Questions

What is NSN 4730-00-678-9723?

NSN 4730-00-678-9723 is a Nut,tube Coupling, manufactured by Lenz Inc Dba the Lenz Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-678-9723?

NSN 4730-00-678-9723 has 5 cross-referenced part numbers: 1787809PC5 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 205-8 (Lenz Inc Dba the Lenz Company), 1787809 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 1787809PC5 (Lenz Inc Dba the Lenz Company), 205 (Lenz Inc Dba the Lenz Company).

What NSN replaces 4730-00-678-9723?

There are 12 known substitutes for 4730-00-678-9723: 4730-00-011-3177, 5310-00-053-7808, 5306-00-166-1406 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1787809PC5?

Key specifications for 1787809PC5: Fabrication Method: MACHINED; Length to Shoulder: 0.594 INCHES NOMINAL IN; Material: STEEL COMP 1212 OR STEEL COMP 1118 OVERALL; Surface Treatment Document and Classification: MIL-C-16232,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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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