PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R428Socket,wrench,face Spanner

Hiller Aircraft Corporation · NSN 5120-00-035-6549 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-035-6549 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-035-6549. Primary manufacturer part number: R428.
Features
  • Socket,wrench,face Spanner — FSC 5120
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • 1 verified cross-reference
  • Primary manufacturer: Hiller Aircraft Corporation
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Socket,wrench,face Spanner, cataloged under National Stock Number 5120-00-035-6549, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Hiller Aircraft Corporation. Government technical data includes 2 verified specifications, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-035-6549
Primary Part NumberR428
Item NameSocket,wrench,face Spanner
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerHiller Aircraft Corporation
StatusACTIVE
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5945-00-251-7373 INTERCHANGEABLE
Relay,electromagnetic
Cross-Reference Index
Part NumberManufacturer
R428 PRIMARY Hiller Aircraft Corporation (USA)
Related Parts
5945-00-251-7373INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5120-00-035-6549?

NSN 5120-00-035-6549 is a Socket,wrench,face Spanner, manufactured by Hiller Aircraft Corporation, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-035-6549?

NSN 5120-00-035-6549 has 1 cross-referenced part number: R428 (Hiller Aircraft Corporation).

What NSN replaces 5120-00-035-6549?

There is 1 known substitute for 5120-00-035-6549: 5945-00-251-7373. Verify interchangeability with system specifications before substitution.

What are the specifications of R428?

Key specifications for R428: Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN; Drive End Shape: SQUARE SINGLE END INTERNAL. 2 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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