PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A18-10Nut,tube Coupling

Lube Devices Inc Flodar Fluid Power Fittings Div · NSN 4730-00-897-2043 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-897-2043 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-897-2043. Primary manufacturer part number: A18-10.
Features
  • Nut,tube Coupling — FSC 4730
  • Thread Class: 2B
  • Material: STEEL OVERALL
  • Surface Treatment: PHOSPHATE OVERALL
  • Material Document and Classification: AISI 12L14 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Nominal Thread Size: 0.875 INCHES IN
  • Width Across Flats: 1.000 INCHES NOMINAL IN
  • Nut Style: TUBE COUPLING
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 4730-00-897-2043, 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 Lube Devices Inc Flodar Fluid Power Fittings Div. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 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
NSN4730-00-897-2043
Primary Part NumberA18-10
Item NameNut,tube Coupling
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerLube Devices Inc Flodar Fluid Power Fittings Div
StatusACTIVE
Thread Class2B
MaterialSTEEL OVERALL
Surface TreatmentPHOSPHATE OVERALL
Material Document and ClassificationAISI 12L14 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nominal Thread Size0.875 INCHES IN
Width Across Flats1.000 INCHES NOMINAL IN
Nut StyleTUBE COUPLING
Seat Angle37.00 DEGREES NOMINAL
Nut Height0.970 INCHES NOMINAL IN
Thread SeriesUNF
Thread Quantity Per Inch16
Nominal Tube Outside Diameter0.625 INCHES IN
Smallest Inside Diameter0.698 INCHES NOMINAL IN
Specification/standard Data96906-MS5153 GOVERNMENT STANDARD
Thread DirectionRIGHT-HAND
Surface Treatment Document and ClassificationMIL-P-16232,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-081-6384A18-10 INTERCHANGEABLE
Gasket
Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc
4510-00-444-1802 INTERCHANGEABLE
Ball Cock,tank,wate
5355-00-484-1465A1810 INTERCHANGEABLE
Pointer,dial
Scientific Atlanta Inc
5940-00-549-725310015524-004 INTERCHANGEABLE
Terminal,lug
Us Army Aviation and Missile Command
4730-00-595-28435H275 INTERCHANGEABLE
Nut,tube Coupling
Caterpillar Inc Div Caterpillar Defense
4330-00-931-2473CM424-5 INTERCHANGEABLE
Filter Element,fluid
Facet (oklahoma) Llc
8415-01-137-475967A1810 INTERCHANGEABLE
Crown Pad
Gentex Corp
3030-01-443-5139AP70 SET 3 INTERCHANGEABLE
Belts,v,matched Set
Carlisle Power Transmission Products Inc
8455-01-568-0459 INTERCHANGEABLE
Insignia,shoulder Sleeve
8455-01-568-0505 INTERCHANGEABLE
Insignia,shoulder Sleeve
Cross-Reference Index
Part NumberManufacturer
A18-10 Lube Devices Inc Flodar Fluid Power Fittings Div (USA)
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10BTXS Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
10BTXS Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters (USA)
MS51531B10 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
10BTXS Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
Related Parts
5330-00-081-6384INTERCHANGEABLE
GASKET
A18-10
4510-00-444-1802INTERCHANGEABLE
BALL COCK,TANK,WATE
5355-00-484-1465INTERCHANGEABLE
POINTER,DIAL
A1810
5940-00-549-7253INTERCHANGEABLE
TERMINAL,LUG
10015524-004
4730-00-595-2843INTERCHANGEABLE
NUT,TUBE COUPLING
5H275
4330-00-931-2473INTERCHANGEABLE
FILTER ELEMENT,FLUID
CM424-5
8415-01-137-4759INTERCHANGEABLE
CROWN PAD
67A1810
3030-01-443-5139INTERCHANGEABLE
BELTS,V,MATCHED SET
AP70 SET 3
8455-01-568-0459INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-568-0505INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
4140-01-591-8843INTERCHANGEABLE
IMPELLER,FAN,AXIAL
NT1810
4730-01-598-3318INTERCHANGEABLE
NUT,UNION
10BTX-S

Frequently Asked Questions

What is NSN 4730-00-897-2043?

NSN 4730-00-897-2043 is a Nut,tube Coupling, manufactured by Lube Devices Inc Flodar Fluid Power Fittings Div, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-897-2043?

NSN 4730-00-897-2043 has 6 cross-referenced part numbers: A18-10 (Lube Devices Inc Flodar Fluid Power Fittings Div), MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 10BTXS (Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division), 10BTXS (Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters), MS51531B10 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 4730-00-897-2043?

There are 12 known substitutes for 4730-00-897-2043: 5330-00-081-6384, 4510-00-444-1802, 5355-00-484-1465 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A18-10?

Key specifications for A18-10: Thread Class: 2B; Material: STEEL OVERALL; Surface Treatment: PHOSPHATE OVERALL; Material Document and Classification: AISI 12L14 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 16 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