PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

UN-4Universal Joint,vehicular

Designatronics Incorporated Div Sterling Instruments Div · NSN 2520-01-168-1678 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-01-168-1678 — this item is cataloged by the U.S. Government under National Stock Number 2520-01-168-1678. Primary manufacturer part number: UN-4.
Features
  • Universal Joint,vehicular — FSC 2520
  • Design Type: SPIDER AND BEARINGS
  • Connection End Type: HUB,BORED FIRST END
  • Hub Bore Diameter: 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
  • Connection End Type: HUB,BORED SECOND END
  • 11 verified cross-references
  • Primary manufacturer: Designatronics Incorporated Div Sterling Instruments Div
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Universal Joint,vehicular, cataloged under National Stock Number 2520-01-168-1678, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Designatronics Incorporated Div Sterling Instruments Div. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-01-168-1678
Primary Part NumberUN-4
Item NameUniversal Joint,vehicular
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerDesignatronics Incorporated Div Sterling Instruments Div
StatusACTIVE
Design TypeSPIDER AND BEARINGS
Connection End TypeHUB,BORED FIRST END
Hub Bore Diameter0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
Connection End TypeHUB,BORED SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5999-00-203-5573539603-2 INTERCHANGEABLE
Contact,electrical
Raytheon Company Dba Raytheon
6135-00-635-8401 INTERCHANGEABLE
Bias Cell
3010-00-725-8019 INTERCHANGEABLE
Universal Joint,nonvehicular
5930-00-908-7330BC3 INTERCHANGEABLE
Switch,thermostatic
Therm-O-Disc Incorporated
5110-01-068-5253 INTERCHANGEABLE
Cutter,cable,hand Operated
3411-01-074-6634BC-3 INTERCHANGEABLE
Chuck,bearing
Bearing Inspection, Inc. Dba Bearing Inspection Inc
6130-01-141-1313 INTERCHANGEABLE
Charger,battery
Cross-Reference Index
Part NumberManufacturer
A310528 Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division (USA)
CNS-A1-3 Nordex Inc (USA)
UN-4 PRIMARY Designatronics Incorporated Div Sterling Instruments Div (USA)
DBC3 Allied Devices Corp Dba Absolute Precision Co (USA)
1218267-201 Lockheed Martin Corporation Div Rms (USA)
1218267-201 Teledyne Defense Electronics, Llc Dba Teledyne Storm Microwave Div Teledyne Storm Microwave (USA)
UJ-3 W. M. Berg, Inc. (USA)
CNS-A1-3 Nordex, Incorporated Dba Nordex Inc (USA)
1218267-201 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
3021769 Ebac Limited (GBR)
BC-3 PRIMARY Roller Bearing Co of America, Inc Div Pic Design (USA)
Related Parts
5999-00-203-5573INTERCHANGEABLE
CONTACT,ELECTRICAL
539603-2
6135-00-635-8401INTERCHANGEABLE
BIAS CELL
3010-00-725-8019INTERCHANGEABLE
UNIVERSAL JOINT,NONVEHICULAR
5930-00-908-7330INTERCHANGEABLE
SWITCH,THERMOSTATIC
BC3
5110-01-068-5253INTERCHANGEABLE
CUTTER,CABLE,HAND OPERATED
3411-01-074-6634INTERCHANGEABLE
CHUCK,BEARING
BC-3
6130-01-141-1313INTERCHANGEABLE
CHARGER,BATTERY

Frequently Asked Questions

What is NSN 2520-01-168-1678?

NSN 2520-01-168-1678 is a Universal Joint,vehicular, manufactured by Designatronics Incorporated Div Sterling Instruments Div, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-01-168-1678?

NSN 2520-01-168-1678 has 11 cross-referenced part numbers: A310528 (Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division), CNS-A1-3 (Nordex Inc), UN-4 (Designatronics Incorporated Div Sterling Instruments Div), DBC3 (Allied Devices Corp Dba Absolute Precision Co), 1218267-201 (Lockheed Martin Corporation Div Rms) and 6 more.

What NSN replaces 2520-01-168-1678?

There are 7 known substitutes for 2520-01-168-1678: 5999-00-203-5573, 6135-00-635-8401, 3010-00-725-8019 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of UN-4?

Key specifications for UN-4: Overall Length: 1.510 INCHES NOMINAL IN; Design Type: SPIDER AND BEARINGS; Connection End Type: HUB,BORED FIRST END; Hub Bore Diameter: 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN. 6 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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