PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFS86TYPE6Screw,cap,socket Head

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5305-00-995-1539 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-995-1539 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-995-1539. Primary manufacturer part number: FFS86TYPE6.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Class: 2A A
  • Internal Drive Style: HEXAGON
  • Thread Direction: RIGHT-HAND
  • Thread Quantity Per Inch: 20
  • Nominal Thread Diameter: 0.250 INCHES IN
  • Material: NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
  • Width Across Flats: 0.187 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Nickel Alloy 400 or Nickel Alloy R-405 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-995-1539, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 14 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-995-1539
Primary Part NumberFFS86TYPE6
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Thread Class2A A
Internal Drive StyleHEXAGON
Thread DirectionRIGHT-HAND
Thread Quantity Per Inch20
Nominal Thread Diameter0.250 INCHES IN
MaterialNICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
Width Across Flats0.187 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Head Diameter0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Material Document and ClassificationQQ-N-281 CL A OR CL B FED SPEC ALL MATERIAL RESPONSES OVERALL
Thread Length0.900 INCHES MINIMUM IN
Head Height0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Fastener Length1.000 INCHES NOMINAL IN
Head StyleFLAT CHAMFER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5305-00-080-4480 INTERCHANGEABLE
Screw,cap,socket Head
5305-00-227-100312F1007-293 INTERCHANGEABLE
Screw,cap,socket Head
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5305-00-273-555712Z1196-14 INTERCHANGEABLE
Screw,cap,socket Head
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5305-00-273-558112Z1007-217 INTERCHANGEABLE
Screw,cap,socket Head
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5305-00-806-2582 INTERCHANGEABLE
Screw,cap,socket Head
5305-00-865-165660-16-1362 INTERCHANGEABLE
Screw,cap,socket Head
Electric Boat Corporation Div General Dynamics Electric Boat
5305-00-865-165960-16-1672 INTERCHANGEABLE
Screw,cap,socket Head
Electric Boat Corporation Div General Dynamics Electric Boat
5305-00-866-310460-16-1670A INTERCHANGEABLE
Screw,cap,socket Head
Electric Boat Corporation Div General Dynamics Electric Boat
5305-00-952-0343 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-107-799420098-4C20C INTERCHANGEABLE
Screw,cap,socket Head
Sps Technologies, Llc Dba PB Fasteners
Cross-Reference Index
Part NumberManufacturer
FFS86TYPE6 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5305-00-080-4480INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-00-227-1003INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
12F1007-293
5305-00-273-5557INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
12Z1196-14
5305-00-273-5581INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
12Z1007-217
5305-00-806-2582INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-00-865-1656INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
60-16-1362
5305-00-865-1659INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
60-16-1672
5305-00-866-3104INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
60-16-1670A
5305-00-952-0343INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-107-7994INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
20098-4C20C
5305-01-265-2069INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-00-995-1539?

NSN 5305-00-995-1539 is a Screw,cap,socket Head, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-995-1539?

NSN 5305-00-995-1539 has 1 cross-referenced part number: FFS86TYPE6 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-00-995-1539?

There are 11 known substitutes for 5305-00-995-1539: 5305-00-080-4480, 5305-00-227-1003, 5305-00-273-5557 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFS86TYPE6?

Key specifications for FFS86TYPE6: Thread Class: 2A A; Internal Drive Style: HEXAGON; Thread Direction: RIGHT-HAND; Thread Quantity Per Inch: 20. 14 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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