PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66910111-1Screw,cap,socket Head

Northrop Grumman Systems Corporation · NSN 5305-01-386-3756 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-386-3756 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-386-3756. Primary manufacturer part number: 66910111-1.
Features
  • Screw,cap,socket Head — FSC 5305
  • Head Style: FLAT FILLISTER
  • Material: STEEL CORROSION RESISTING OVERALL
  • Thread Series Designator: UNRC
  • Surface Finish: 125.0 MICROINCHES OVERALL
  • Fastener Length: 0.438 INCHES NOMINAL IN
  • Head Diameter: 0.222 INCHES NOMINAL IN
  • Head Height: 0.138 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-386-3756, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-386-3756
Primary Part Number66910111-1
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation
StatusACTIVE
Head StyleFLAT FILLISTER
MaterialSTEEL CORROSION RESISTING OVERALL
Thread Series DesignatorUNRC
Surface Finish125.0 MICROINCHES OVERALL
Fastener Length0.438 INCHES NOMINAL IN
Head Diameter0.222 INCHES NOMINAL IN
Head Height0.138 INCHES NOMINAL IN
Thread Class3A A
Internal Drive StyleHEXAGON
Thread Quantity Per Inch32
Thread DirectionRIGHT-HAND
Width Across Flats0.110 INCHES NOMINAL IN
Thread Length0.267 INCHES NOMINAL IN
Nominal Thread Diameter0.138 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5305-00-788-8401NAS1352C06-6 INTERCHANGEABLE
Screw,cap,socket Head
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-550-6291NAS1352C06-6 INTERCHANGEABLE
Screw,cap,socket Head
Hamilton Sundstrand Corporation
Cross-Reference Index
Part NumberManufacturer
66910111-1 PRIMARY Northrop Grumman Systems Corporation (USA)
NAS1352C06-6 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
8635-1405-00 Elop Electro Optical Industries Ltd (ISR)
8635-1405-00 Elbit Systems Electro-Optics Elop Ltd (ISR)
Related Parts
5305-00-788-8401INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
NAS1352C06-6
5305-01-550-6291INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
NAS1352C06-6

Frequently Asked Questions

What is NSN 5305-01-386-3756?

NSN 5305-01-386-3756 is a Screw,cap,socket Head, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-386-3756?

NSN 5305-01-386-3756 has 4 cross-referenced part numbers: 66910111-1 (Northrop Grumman Systems Corporation), NAS1352C06-6 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 8635-1405-00 (Elop Electro Optical Industries Ltd), 8635-1405-00 (Elbit Systems Electro-Optics Elop Ltd).

What NSN replaces 5305-01-386-3756?

There are 2 known substitutes for 5305-01-386-3756: 5305-00-788-8401, 5305-01-550-6291. Verify interchangeability with system specifications before substitution.

What are the specifications of 66910111-1?

Key specifications for 66910111-1: Head Style: FLAT FILLISTER; Material: STEEL CORROSION RESISTING OVERALL; Thread Series Designator: UNRC; Surface Finish: 125.0 MICROINCHES OVERALL. 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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