PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS608C3-6Screw,cap,socket Head

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-813-3861 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-813-3861 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-813-3861. Primary manufacturer part number: NAS608C3-6.
Features
  • Screw,cap,socket Head — FSC 5305
  • Head Height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
  • Surface Treatment: PASSIVATE OVERALL
  • Material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
  • Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Internal Drive Style: HEXAGON
  • Thread Quantity Per Inch: 32
  • Thread Length: 0.375 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 or Steel Comp 303 or Steel Comp 304 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-813-3861, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 15 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
NSN5305-00-813-3861
Primary Part NumberNAS608C3-6
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Head Height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
Material Document and ClassificationAISI ASSN STD ALL MATERIAL RESPONSES OVERALL
Internal Drive StyleHEXAGON
Thread Quantity Per Inch32
Thread Length0.375 INCHES NOMINAL IN
Thread Class3A A
Thread Series DesignatorUNF
Nominal Thread Diameter0.190 INCHES IN
Fastener Length0.375 INCHES NOMINAL IN
Head StyleFLAT CHAMFER
Head Diameter0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
Width Across Flats0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5305-00-057-4593MS16996-9 INTERCHANGEABLE
Screw,cap,socket Head
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
NAS608C3-6 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
5305-00-057-4593INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
MS16996-9

Frequently Asked Questions

What is NSN 5305-00-813-3861?

NSN 5305-00-813-3861 is a Screw,cap,socket Head, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-813-3861?

NSN 5305-00-813-3861 has 1 cross-referenced part number: NAS608C3-6 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use).

What NSN replaces 5305-00-813-3861?

There is 1 known substitute for 5305-00-813-3861: 5305-00-057-4593. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS608C3-6?

Key specifications for NAS608C3-6: Head Height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Surface Treatment: PASSIVATE OVERALL; Material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL; Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL. 15 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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