PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS662C2-6Screw,machine

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-808-2581 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-808-2581 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-808-2581. Primary manufacturer part number: NAS662C2-6.
Features
  • Screw,machine — FSC 5305
  • Countersink Angle: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
  • Screw Surface Treatment: PASSIVATE
  • Head Style: FLAT COUNTERSUNK
  • Thread Class: 2A A
  • Nominal Thread Diameter: 0.086 INCHES IN
  • Internal Drive Style: SLOT
  • Screw Material Document and Classification: MIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-7720 COMP 303S MIL SPEC 2ND MATERIAL RESPONSE OR QQ-S-763 CL 321 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 CL 347 FED SPEC 4TH MATERIAL RESPONSE
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-808-2581, 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 3 commercial cross-references from 3 manufacturers, 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
NSN5305-00-808-2581
Primary Part NumberNAS662C2-6
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Countersink Angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
Screw Surface TreatmentPASSIVATE
Head StyleFLAT COUNTERSUNK
Thread Class2A A
Nominal Thread Diameter0.086 INCHES IN
Internal Drive StyleSLOT
Screw Material Document and ClassificationMIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-7720 COMP 303S MIL SPEC 2ND MATERIAL RESPONSE OR QQ-S-763 CL 321 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 CL 347 FED SPEC 4TH MATERIAL RESPONSE
Screw Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
Thread Quantity Per Inch56
Head Diameter0.156 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
Fastener Length0.375 INCHES NOMINAL IN
Minimum Tensile Strength80000 POUNDS PER SQUARE INCH LBS
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread DirectionRIGHT-HAND
Thread Length0.339 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5305-00-763-3356MS51959-5 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
FF-S-92 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
10125504 Nimikkeistokeskus Ncb Finland (FIN)
NAS662C2-6 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
5305-00-763-3356INTERCHANGEABLE
SCREW,MACHINE
MS51959-5

Frequently Asked Questions

What is NSN 5305-00-808-2581?

NSN 5305-00-808-2581 is a Screw,machine, 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 5305-00-808-2581?

NSN 5305-00-808-2581 has 3 cross-referenced part numbers: FF-S-92 (Federal Specifications Promulgated by General Services Administration Washington DC), 10125504 (Nimikkeistokeskus Ncb Finland), NAS662C2-6 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use).

What NSN replaces 5305-00-808-2581?

There is 1 known substitute for 5305-00-808-2581: 5305-00-763-3356. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS662C2-6?

Key specifications for NAS662C2-6: Countersink Angle: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM; Screw Surface Treatment: PASSIVATE; Head Style: FLAT COUNTERSUNK; Thread Class: 2A A. 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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