PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-18866Adapter,straight,tube to Boss

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-460-3929 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-460-3929 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-460-3929. Primary manufacturer part number: MIL-DTL-18866.
Features
  • Adapter,straight,tube to Boss — FSC 4730
  • Thread Pitch Diameters: +0.3500 TO 0.3700 INCHES ALL ENDS IN
  • Thread Series Designator: UNF ALL ENDS
  • Connection Style: SWIVEL NUT W/ COMPRESSION SLEEVE (TUBE) ALL ENDS
  • Material Document and Classification: MS51525 MIL SPEC ALL MATERIAL RESPONSES OVERALL
  • Nominal Thread Size: 0.438 INCHES ALL ENDS IN
  • Nominal Overall Length: 1.230 INCHES IN
  • Nominal Thickness: 0.172 INCHES ALL ENDS IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-460-3929, 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 Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN4730-01-460-3929
Primary Part NumberMIL-DTL-18866
Item NameAdapter,straight,tube to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread Pitch Diameters+0.3500 TO 0.3700 INCHES ALL ENDS IN
Thread Series DesignatorUNF ALL ENDS
Connection StyleSWIVEL NUT W/ COMPRESSION SLEEVE (TUBE) ALL ENDS
Material Document and ClassificationMS51525 MIL SPEC ALL MATERIAL RESPONSES OVERALL
Nominal Thread Size0.438 INCHES ALL ENDS IN
Nominal Overall Length1.230 INCHES IN
Nominal Thickness0.172 INCHES ALL ENDS IN
Connection TypeTHREADED INTERNAL TUBE ALL ENDS
Flange ShapeHEXAGON ALL ENDS
Thread Quantity Per Inch20 ALL ENDS
Surface TreatmentZINC OVERALL
Nominal Width Across Flats1.230 INCHES ALL ENDS IN
Nominal Outside Diameter Tube Accommodated0.250 INCHES ALL ENDS IN
MaterialSTEEL CORROSION RESISTING OVERALL
Seat Angle37.0 DEGREES ALL ENDS
Thread Class2A ALL ENDS A
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
4730-01-464-9113 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-569-2648 INTERCHANGEABLE
Adapter,straight,tube to Boss
4730-01-600-7019 INTERCHANGEABLE
Adapter,straight,tube to Boss
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS51525B4Z Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS51525 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
4730014603929 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
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
4730-01-464-9113INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-569-2648INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
4730-01-600-7019INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS

Frequently Asked Questions

What is NSN 4730-01-460-3929?

NSN 4730-01-460-3929 is a Adapter,straight,tube to Boss, manufactured by Military Specifications Promulgated by Military Departments/agencies 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 4730-01-460-3929?

NSN 4730-01-460-3929 has 4 cross-referenced part numbers: MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS51525B4Z (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MS51525 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 4730014603929 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales).

What NSN replaces 4730-01-460-3929?

There are 6 known substitutes for 4730-01-460-3929: 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 MIL-DTL-18866?

Key specifications for MIL-DTL-18866: Thread Pitch Diameters: +0.3500 TO 0.3700 INCHES ALL ENDS IN; Thread Series Designator: UNF ALL ENDS; Connection Style: SWIVEL NUT W/ COMPRESSION SLEEVE (TUBE) ALL ENDS; Material Document and Classification: MS51525 MIL SPEC ALL MATERIAL RESPONSES 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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