PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7M51-6Sleeve,flared,tube Fitting

The Boeing Company Div Defense · NSN 4730-01-189-3435 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-189-3435 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-189-3435. Primary manufacturer part number: 7M51-6.
Features
  • Sleeve,flared,tube Fitting — FSC 4730
  • Seat Angle in Deg: 33.0
  • Material: STEEL COMP 4130 OR STEEL COMP 4140
  • Surface Treatment: CADMIUM AND CHROMATE
  • Style Designator: SLEEVE
  • Flange Width: 0.172 INCHES NOMINAL IN
  • Sleeve Outside Diameter: 0.432 INCHES NOMINAL IN
  • Casehardening Indicator: NOT CASEHARDENED
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 4130 or Steel Comp 4140 construction
General Description

The Sleeve,flared,tube Fitting, cataloged under National Stock Number 4730-01-189-3435, 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 The Boeing Company Div Defense. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-189-3435
Primary Part Number7M51-6
Item NameSleeve,flared,tube Fitting
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
Seat Angle in Deg33.0
MaterialSTEEL COMP 4130 OR STEEL COMP 4140
Surface TreatmentCADMIUM AND CHROMATE
Style DesignatorSLEEVE
Flange Width0.172 INCHES NOMINAL IN
Sleeve Outside Diameter0.432 INCHES NOMINAL IN
Casehardening IndicatorNOT CASEHARDENED
Flange Outside Diameter0.502 INCHES NOMINAL IN
Hose/tube Outside Diameter for Which Designed0.375 INCHES NOMINAL IN
Metallic Hardness Rating35.0 MINIMUM ROCKWELL C AND 40.0 MAXIMUM ROCKWELL C
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4730-00-984-33737M51-12 INTERCHANGEABLE
Sleeve,flared,tube Fitting
Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply
4730-00-984-85227M51-16 INTERCHANGEABLE
Sleeve,flared,tube Fitting
The Boeing Company Div Defense
4730-01-089-65037M51-8 INTERCHANGEABLE
Sleeve,flared,tube Fitting
The Boeing Company Div Defense
4720-01-128-22847M516-1 INTERCHANGEABLE
Hose Assembly,nonmetallic
The Boeing Company Div Defense
5331-01-469-82427M 51 INTERCHANGEABLE
O-Ring
Oerlikon Metco Us Inc
Cross-Reference Index
Part NumberManufacturer
7M51-6 Bailey Hose Inc (USA)
7M51-6 Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company (USA)
7M51-6 PRIMARY The Boeing Company Div Defense (USA)
7M51-6 Sps Technologies, Llc Dba Airdrome Precision Components (USA)
7M51-6 Crown Fitting Co Inc (USA)
7M51-6 Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA)
7M51 The Boeing Company Div Defense (USA)
7M51-6 Nelson Aero Space, Inc. (USA)
Related Parts
4730-00-984-3373INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
7M51-12
4730-00-984-8522INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
7M51-16
4730-01-089-6503INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
7M51-8
4720-01-128-2284INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
7M516-1
5331-01-469-8242INTERCHANGEABLE
O-RING
7M 51

Frequently Asked Questions

What is NSN 4730-01-189-3435?

NSN 4730-01-189-3435 is a Sleeve,flared,tube Fitting, manufactured by The Boeing Company Div Defense, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-189-3435?

NSN 4730-01-189-3435 has 8 cross-referenced part numbers: 7M51-6 (Bailey Hose Inc), 7M51-6 (Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company), 7M51-6 (The Boeing Company Div Defense), 7M51-6 (Sps Technologies, Llc Dba Airdrome Precision Components), 7M51-6 (Crown Fitting Co Inc) and 3 more.

What NSN replaces 4730-01-189-3435?

There are 5 known substitutes for 4730-01-189-3435: 4730-00-984-3373, 4730-00-984-8522, 4730-01-089-6503 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7M51-6?

Key specifications for 7M51-6: Seat Angle in Deg: 33.0; Material: STEEL COMP 4130 OR STEEL COMP 4140; Surface Treatment: CADMIUM AND CHROMATE; Style Designator: SLEEVE. 11 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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