PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9-55612Ring,externally Threaded

The Boeing Company Div Defense · NSN 5365-00-766-0478 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-766-0478 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-766-0478. Primary manufacturer part number: 9-55612.
Features
  • Ring,externally Threaded — FSC 5365
  • Thread Direction: RIGHT-HAND
  • Bore Annular Internal Serration: NOT INCLUDED
  • Beveled Thread: NOT INCLUDED
  • Screw Thread Series Designator: UNS
  • Bore Diameter: 5.425 INCHES MINIMUM AND 5.427 INCHES MAXIMUM IN
  • Thread Size: 6.125-12
  • Bore Shape: STRAIGHT
Applications
  • Applications requiring Steel Comp 8740 construction
General Description

The Ring,externally Threaded, cataloged under National Stock Number 5365-00-766-0478, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5365-00-766-0478
Primary Part Number9-55612
Item NameRing,externally Threaded
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusCANCELLED
Thread DirectionRIGHT-HAND
Bore Annular Internal SerrationNOT INCLUDED
Beveled ThreadNOT INCLUDED
Screw Thread Series DesignatorUNS
Bore Diameter5.425 INCHES MINIMUM AND 5.427 INCHES MAXIMUM IN
Thread Size6.125-12
Bore ShapeSTRAIGHT
Accommodation Type and Quantity8 SLOTS
Angle Between Accommodations in Deg45.0
Depth0.718 INCHES NOMINAL IN
Setscrew Locking NotchNOT INCLUDED
Process End LocationBOTH ENDS
Width0.437 INCHES NOMINAL IN
Drive TypeSLOTTED FACE
Bore Edge ProcessCHAMFERED
MaterialSTEEL COMP 8740
Surface TreatmentCADMIUM
Material Document and ClassificationAMS 6324 ASSN STD SINGLE MATERIAL RESPONSE
Chamfer Angle in Deg45.0
Thread Class3A A
Chamfer Length0.030 INCHES NOMINAL AND 0.040 INCHES NOMINAL IN
Casehardening IndicatorNOT CASEHARDENED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
2510-00-693-05927372719 INTERCHANGEABLE
Retainer,cab Top
U S Army Tank Automotive Command Amsta-Im-Mm
3455-01-057-1563158665 INTERCHANGEABLE
File,rotary
Jarvis Cutting Tools Inc
Cross-Reference Index
Part NumberManufacturer
9-55612 Airtronics, Llc (USA)
9-55612 Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA)
9-55612 PRIMARY The Boeing Company Div Defense (USA)
158665 Goodrich Corporation Div Advanced Structures Landing Systems (USA)
9-55612 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA)
9-55612 Aerometals, Inc. (USA)
158665 Goodrich Corp Dba Goodrich Corp (USA)
158665 Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) (USA)
Related Parts
2510-00-693-0592INTERCHANGEABLE
RETAINER,CAB TOP
7372719
3455-01-057-1563INTERCHANGEABLE
FILE,ROTARY
158665

Frequently Asked Questions

What is NSN 5365-00-766-0478?

NSN 5365-00-766-0478 is a Ring,externally Threaded, manufactured by The Boeing Company Div Defense, classified under FSC 5365 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5365-00-766-0478?

NSN 5365-00-766-0478 has 8 cross-referenced part numbers: 9-55612 (Airtronics, Llc), 9-55612 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 9-55612 (The Boeing Company Div Defense), 158665 (Goodrich Corporation Div Advanced Structures Landing Systems), 9-55612 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp) and 3 more.

What NSN replaces 5365-00-766-0478?

There are 2 known substitutes for 5365-00-766-0478: 2510-00-693-0592, 3455-01-057-1563. Verify interchangeability with system specifications before substitution.

What are the specifications of 9-55612?

Key specifications for 9-55612: Thread Direction: RIGHT-HAND; Bore Annular Internal Serration: NOT INCLUDED; Beveled Thread: NOT INCLUDED; Screw Thread Series Designator: UNS. 23 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5365-00-766-0478 still in active supply?

NSN 5365-00-766-0478 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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