PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

550-400Support,face Bow Bite Fork,denta

Ortho Technology Inc. · NSN 6520-01-521-6027 · FSC 6520 · No Item Name Available
Verified by PartsTable
NSN 6520-01-521-6027 — this item is cataloged by the U.S. Government under National Stock Number 6520-01-521-6027. Primary manufacturer part number: 550-400.
Features
  • Support,face Bow Bite Fork,denta — FSC 6520
  • Material: PLASTIC AND STEEL CORROSION RESISTING
  • 1 verified cross-reference
  • Primary manufacturer: Ortho Technology Inc.
Applications
  • Applications requiring Plastic and Steel Corrosion Resisting construction
General Description

The Support,face Bow Bite Fork,denta, cataloged under National Stock Number 6520-01-521-6027, is classified within Federal Supply Class 6520 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Ortho Technology Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6520-01-521-6027
Primary Part Number550-400
Item NameSupport,face Bow Bite Fork,denta
FSC / FSG6520 / 65 — No Item Name Available
ManufacturerOrtho Technology Inc.
StatusACTIVE
MaterialPLASTIC AND STEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4820-00-147-651755-0400 INTERCHANGEABLE
Valve,stop-Check
Aerocontrolex Group, Inc. Dba Aero Fluid Products
3110-00-227-4667181167 INTERCHANGEABLE
Cup,tapered Roller Bearing
Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)
3110-01-019-3564358964-1 INTERCHANGEABLE
Bearing,ball,annular
New Hampshire Ball Bearings Inc Div Hitech Division
Cross-Reference Index
Part NumberManufacturer
550-400 PRIMARY Ortho Technology Inc. (USA)
Related Parts
4820-00-147-6517INTERCHANGEABLE
VALVE,STOP-CHECK
55-0400
3110-00-227-4667INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
181167
3110-01-019-3564INTERCHANGEABLE
BEARING,BALL,ANNULAR
358964-1

Frequently Asked Questions

What is NSN 6520-01-521-6027?

NSN 6520-01-521-6027 is a Support,face Bow Bite Fork,denta, manufactured by Ortho Technology Inc., classified under FSC 6520 (No Item Name Available). Status: active.

What are the part numbers for NSN 6520-01-521-6027?

NSN 6520-01-521-6027 has 1 cross-referenced part number: 550-400 (Ortho Technology Inc.).

What NSN replaces 6520-01-521-6027?

There are 3 known substitutes for 6520-01-521-6027: 4820-00-147-6517, 3110-00-227-4667, 3110-01-019-3564. Verify interchangeability with system specifications before substitution.

What are the specifications of 550-400?

Key specifications for 550-400: Material: PLASTIC AND STEEL CORROSION RESISTING; Part Name Assigned by Controlling Agency: CONSTANT FORCE HEADGEAR; Special Features: BLUE PROTRACTION FACEMASK; LIGHT-WEIGHT; FULLY ADJUSTABLE; TWO REPLACEMENT PADS; HEXAGON KEY INCLUDED. 3 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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