PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R503Socket,socket Wrench

Hiller Aircraft Corporation · NSN 5120-00-032-6171 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-032-6171 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-032-6171. Primary manufacturer part number: R503.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Wrenching Surface Shape: HEXAGON SINGLE END INTERNAL
  • Material: STEEL OVERALL
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Wrenching Surface Size: 4.250 INCHES NOMINAL SINGLE END IN
  • 1 verified cross-reference
  • Primary manufacturer: Hiller Aircraft Corporation
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-032-6171, 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 5 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-032-6171
Primary Part NumberR503
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerHiller Aircraft Corporation
StatusCANCELLED
Drive End ShapeSQUARE SINGLE END INTERNAL
Wrenching Surface ShapeHEXAGON SINGLE END INTERNAL
MaterialSTEEL OVERALL
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Wrenching Surface Size4.250 INCHES NOMINAL SINGLE END IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
3110-00-159-9283ART2034A INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
5977-00-337-81121906945 INTERCHANGEABLE
Brush,electrical Contact
Delco Remy America Inc
4820-00-664-6655 INTERCHANGEABLE
Valve,regulating,fluid Pressure
5999-01-597-9377R50-3 INTERCHANGEABLE
Contact,electrical
Test Connections, Inc.
6850-01-698-2269R-503 INTERCHANGEABLE
Inspection Penetrant
Mcgean-Rohco Inc
Cross-Reference Index
Part NumberManufacturer
R503 PRIMARY Hiller Aircraft Corporation (USA)
Related Parts
3110-00-159-9283INTERCHANGEABLE
BEARING,BALL,ANNULAR
ART2034A
5977-00-337-8112INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
1906945
4820-00-664-6655INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
5999-01-597-9377INTERCHANGEABLE
CONTACT,ELECTRICAL
R50-3
6850-01-698-2269INTERCHANGEABLE
INSPECTION PENETRANT
R-503

Frequently Asked Questions

What is NSN 5120-00-032-6171?

NSN 5120-00-032-6171 is a Socket,socket Wrench, manufactured by Hiller Aircraft Corporation, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-032-6171?

NSN 5120-00-032-6171 has 1 cross-referenced part number: R503 (Hiller Aircraft Corporation).

What NSN replaces 5120-00-032-6171?

There are 5 known substitutes for 5120-00-032-6171: 3110-00-159-9283, 5977-00-337-8112, 4820-00-664-6655 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of R503?

Key specifications for R503: Drive End Shape: SQUARE SINGLE END INTERNAL; Wrenching Surface Shape: HEXAGON SINGLE END INTERNAL; Material: STEEL OVERALL; Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-032-6171 still in active supply?

NSN 5120-00-032-6171 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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