PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SEC027C12LSeal,conical,flared Tube Fitting

Howmet Global Fastening Systems Inc Div Torrance Operations · NSN 4730-00-078-8519 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-078-8519 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-078-8519. Primary manufacturer part number: SEC027C12L.
Features
  • Seal,conical,flared Tube Fitting — FSC 4730
  • Hose/tube Outside Diameter for Which Designed: 0.750 INCHES NOMINAL IN
  • Style Designator: SEAL
  • Seat Angle in Deg: 37.0
  • Body Length: 0.105 INCHES NOMINAL IN
  • Outside Diameter: 0.958 INCHES NOMINAL IN
  • Material: COPPER ALLOY
  • Casehardening Indicator: NOT CASEHARDENED
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Fluid conveyance
  • Hydraulic system plumbing
General Description

The Seal,conical,flared Tube Fitting, cataloged under National Stock Number 4730-00-078-8519, 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 Howmet Global Fastening Systems Inc Div Torrance Operations. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-078-8519
Primary Part NumberSEC027C12L
Item NameSeal,conical,flared Tube Fitting
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerHowmet Global Fastening Systems Inc Div Torrance Operations
StatusACTIVE
Hose/tube Outside Diameter for Which Designed0.750 INCHES NOMINAL IN
Style DesignatorSEAL
Seat Angle in Deg37.0
Body Length0.105 INCHES NOMINAL IN
Outside Diameter0.958 INCHES NOMINAL IN
MaterialCOPPER ALLOY
Casehardening IndicatorNOT CASEHARDENED
Wall Thickness0.010 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4730-00-829-4447VSF1015C12 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Howmet Global Fastening Systems Inc Div Rosan Products
4730-00-871-13397M27A4 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
The Boeing Company Div Defense
4730-00-871-1340SEC027A6 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Seco Seals, Inc
4730-00-932-09577283842-005 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Naval Sea Systems Command
4730-00-960-300210158973-2 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Us Army Aviation and Missile Command
4730-01-102-59647M27CT16 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
The Boeing Company Div Defense
4730-01-117-6589DY90-T-12L INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Del Aerospace Inc Dba Del Aerospace Inc
4730-01-211-93997M27CT2 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
The Boeing Company Div Defense
4730-01-220-8448 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
4730-01-286-8841DY90-T-3L INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Del Aerospace Inc Dba Del Aerospace Inc
Cross-Reference Index
Part NumberManufacturer
7M27C12 The Boeing Company Div Defense (USA)
SEC027C12L Seco Seals, Inc (USA)
SEC027C12L PRIMARY Howmet Global Fastening Systems Inc Div Torrance Operations (USA)
DY90-C-12 Del Aerospace Inc Dba Del Aerospace Inc (USA)
VSF1015C12 Howmet Global Fastening Systems Inc Div Torrance Operations (USA)
VSF1015C12SP Seco Seals, Inc (USA)
SEC027C12 Seco Seals, Inc (USA)
7M27 The Boeing Company Div Defense (USA)
Related Parts
4730-00-829-4447INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
VSF1015C12
4730-00-871-1339INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
7M27A4
4730-00-871-1340INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
SEC027A6
4730-00-932-0957INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
7283842-005
4730-00-960-3002INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
10158973-2
4730-01-102-5964INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
7M27CT16
4730-01-117-6589INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
DY90-T-12L
4730-01-211-9399INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
7M27CT2
4730-01-220-8448INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
4730-01-286-8841INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
DY90-T-3L

Frequently Asked Questions

What is NSN 4730-00-078-8519?

NSN 4730-00-078-8519 is a Seal,conical,flared Tube Fitting, manufactured by Howmet Global Fastening Systems Inc Div Torrance Operations, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-078-8519?

NSN 4730-00-078-8519 has 8 cross-referenced part numbers: 7M27C12 (The Boeing Company Div Defense), SEC027C12L (Seco Seals, Inc), SEC027C12L (Howmet Global Fastening Systems Inc Div Torrance Operations), DY90-C-12 (Del Aerospace Inc Dba Del Aerospace Inc), VSF1015C12 (Howmet Global Fastening Systems Inc Div Torrance Operations) and 3 more.

What NSN replaces 4730-00-078-8519?

There are 10 known substitutes for 4730-00-078-8519: 4730-00-829-4447, 4730-00-871-1339, 4730-00-871-1340 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SEC027C12L?

Key specifications for SEC027C12L: Hose/tube Outside Diameter for Which Designed: 0.750 INCHES NOMINAL IN; Style Designator: SEAL; Seat Angle in Deg: 37.0; Body Length: 0.105 INCHES NOMINAL IN. 9 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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