PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

217920Screw,cap,socket Head

General Motors Llc Dba General Motors Llc · NSN 5305-00-273-5013 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-273-5013 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-273-5013. Primary manufacturer part number: 217920.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Class: 3A A
  • Nondefinitive Spec/std Data: 1 TYPE
  • Material: STEEL OVERALL
  • Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
  • Head Diameter: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Fastener Length: 0.375 INCHES NOMINAL IN
  • Thread Series Designator: UNF
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-273-5013, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN5305-00-273-5013
Primary Part Number217920
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerGeneral Motors Llc Dba General Motors Llc
StatusCANCELLED
Thread Class3A A
Nondefinitive Spec/std Data1 TYPE
MaterialSTEEL OVERALL
Hardness Rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
Head Diameter0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Fastener Length0.375 INCHES NOMINAL IN
Thread Series DesignatorUNF
Internal Drive StyleHEXAGON
Width Across Flats0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Surface Finish63.0 MICROINCHES BEARING SURFACE OF HEAD
Thread Quantity Per Inch32
Minimum Tensile Strength180000 POUNDS PER SQUARE INCH LBS
Head StyleFLAT CHAMFER
Thread Length0.375 INCHES MINIMUM IN
Head Height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
Surface Finish32.0 MICROINCHES THREADS
Nominal Thread Diameter0.190 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
2530-00-773-5589217920 INTERCHANGEABLE
Adjuster Asy
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
4810-01-478-3812217920 INTERCHANGEABLE
Cap,valve
Cadillac Gage Textron Inc.
Cross-Reference Index
Part NumberManufacturer
217920 PRIMARY General Motors Llc Dba General Motors Llc (USA)
217920 General Motors Corp (USA)
FFS86 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
2530-00-773-5589INTERCHANGEABLE
ADJUSTER ASY
217920
4810-01-478-3812INTERCHANGEABLE
CAP,VALVE
217920

Frequently Asked Questions

What is NSN 5305-00-273-5013?

NSN 5305-00-273-5013 is a Screw,cap,socket Head, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-273-5013?

NSN 5305-00-273-5013 has 3 cross-referenced part numbers: 217920 (General Motors Llc Dba General Motors Llc), 217920 (General Motors Corp), FFS86 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-00-273-5013?

There are 2 known substitutes for 5305-00-273-5013: 2530-00-773-5589, 4810-01-478-3812. Verify interchangeability with system specifications before substitution.

What are the specifications of 217920?

Key specifications for 217920: Thread Class: 3A A; Nondefinitive Spec/std Data: 1 TYPE; Material: STEEL OVERALL; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-273-5013 still in active supply?

NSN 5305-00-273-5013 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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