PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51525Adapter,straight,tube to Boss

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-569-2648 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-569-2648 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-569-2648. Primary manufacturer part number: MS51525.
Features
  • Adapter,straight,tube to Boss — FSC 4730
  • Media for Which Designed: HYDRAULIC FLUID SINGLE RESPONSE
  • Surface Treatment: PASSIVATE BODY
  • Nominal Thread Size: 0.562 INCHES ALL ENDS IN
  • Thread Series Designator: UNF ALL ENDS
  • Nominal Outside Diameter Tube Accommodated: 0.375 INCHES FIRST END IN
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Thread Class: 2A ALL ENDS A
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-569-2648, 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 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-569-2648
Primary Part NumberMS51525
Item NameAdapter,straight,tube to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Media for Which DesignedHYDRAULIC FLUID SINGLE RESPONSE
Surface TreatmentPASSIVATE BODY
Nominal Thread Size0.562 INCHES ALL ENDS IN
Thread Series DesignatorUNF ALL ENDS
Nominal Outside Diameter Tube Accommodated0.375 INCHES FIRST END IN
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Thread Class2A ALL ENDS A
Seat Angle37.0 DEGREES ALL ENDS
MaterialSTEEL CORROSION RESISTING BODY
Connection TypeTHREADED EXTERNAL BOSS SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4730-00-080-7040 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-116-5969 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-297-0213 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-460-3929 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-464-9113 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-600-7019 INTERCHANGEABLE
Adapter,straight,tube to Boss
Cross-Reference Index
Part NumberManufacturer
MS51525 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
SAE-J514 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS51525B6-4S Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-080-7040INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-116-5969INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-297-0213INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-460-3929INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-464-9113INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-600-7019INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS

Frequently Asked Questions

What is NSN 4730-01-569-2648?

NSN 4730-01-569-2648 is a Adapter,straight,tube to Boss, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-569-2648?

NSN 4730-01-569-2648 has 4 cross-referenced part numbers: MS51525 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), SAE-J514 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS51525B6-4S (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-569-2648?

There are 6 known substitutes for 4730-01-569-2648: 4730-00-080-7040, 4730-01-116-5969, 4730-01-297-0213 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51525?

Key specifications for MS51525: Media for Which Designed: HYDRAULIC FLUID SINGLE RESPONSE; Surface Treatment: PASSIVATE BODY; Nominal Thread Size: 0.562 INCHES ALL ENDS IN; Thread Series Designator: UNF ALL ENDS. 10 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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