PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

801-6408778 FIND 18L1Screw,cap,socket Head

Naval Inventory Control Point Mechanicsburg · NSN 5305-01-426-4431 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-426-4431 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-426-4431. Primary manufacturer part number: 801-6408778 FIND 18L1.
Features
  • Screw,cap,socket Head — FSC 5305
  • Criticality Code Justification: ZZZX
  • Thread Quantity Per Inch: 10
  • Material Document and Classification: QQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: UNRC
  • Material: NICKEL ALLOY OVERALL
  • Departure From Cited Designator: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
  • Nominal Thread Diameter: 0.750 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Nickel Alloy Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-426-4431, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-426-4431
Primary Part Number801-6408778 FIND 18L1
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Criticality Code JustificationZZZX
Thread Quantity Per Inch10
Material Document and ClassificationQQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorUNRC
MaterialNICKEL ALLOY OVERALL
Departure From Cited DesignatorMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
Nominal Thread Diameter0.750 INCHES IN
Thread Class3A A
Fastener Length2.250 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5305-01-292-3279 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-349-6831 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-428-6053 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-612-7015 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-620-5329 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-640-8796 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-642-3063 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
801-6408778 FIND 18L1 Naval Inventory Control Point Mechanicsburg (USA)
211068837L1 Naval Inventory Control Point Mechanicsburg (USA)
0.750-10UNRC-3A X 2.250L1 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 TY II GR500 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222 TY II GR500L1 Naval Inventory Control Point Mechanicsburg (USA)
211068837 Naval Sea Systems Command (USA)
0.750-10UNRC-3A X 2.250 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
801-6408778 FIND 18 Naval Sea Systems Command (USA)
Related Parts
5305-01-292-3279INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-349-6831INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-428-6053INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-612-7015INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-620-5329INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-640-8796INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-642-3063INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-01-426-4431?

NSN 5305-01-426-4431 is a Screw,cap,socket Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-426-4431?

NSN 5305-01-426-4431 has 8 cross-referenced part numbers: 801-6408778 FIND 18L1 (Naval Inventory Control Point Mechanicsburg), 211068837L1 (Naval Inventory Control Point Mechanicsburg), 0.750-10UNRC-3A X 2.250L1 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 TY II GR500 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-1222 TY II GR500L1 (Naval Inventory Control Point Mechanicsburg) and 3 more.

What NSN replaces 5305-01-426-4431?

There are 7 known substitutes for 5305-01-426-4431: 5305-01-292-3279, 5305-01-349-6831, 5305-01-428-6053 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 801-6408778 FIND 18L1?

Key specifications for 801-6408778 FIND 18L1: Criticality Code Justification: ZZZX; Thread Quantity Per Inch: 10; Material Document and Classification: QQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Series Designator: UNRC. 11 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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