PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5/8-11UNRC-3A X 2 1/4TYIISLFLKL1Screw,cap,socket Head

Naval Inventory Control Point Mechanicsburg · NSN 5305-01-425-4167 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-425-4167 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-425-4167. Primary manufacturer part number: 5/8-11UNRC-3A X 2 1/4TYIISLFLKL1.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Quantity Per Inch: 11
  • Nominal Thread Diameter: 0.625 INCHES IN
  • Material Document and Classification: QQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Material: NICKEL ALLOY OVERALL
  • Departure From Cited Designator: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
  • Criticality Code Justification: ZZZX
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 5305-01-425-4167, 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 10 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
NSN5305-01-425-4167
Primary Part Number5/8-11UNRC-3A X 2 1/4TYIISLFLKL1
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Thread Quantity Per Inch11
Nominal Thread Diameter0.625 INCHES IN
Material Document and ClassificationQQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
MaterialNICKEL ALLOY OVERALL
Departure From Cited DesignatorMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
Criticality Code JustificationZZZX
Fastener Length2.250 INCHES MAXIMUM IN
Thread Class3A A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5305-01-432-7522 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
5/8-11UNRC-3A X 2 1/4TYIISLFLKL1 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 QQ-N-286 GR500L1 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 QQ-N-286 GR500 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
801-6758076 ASSY 1A FN 22 Naval Sea Systems Command (USA)
MIL-DTL-1222 TYPE II MODL1 Naval Inventory Control Point Mechanicsburg (USA)
5/8-11UNRC-3A X 2 1/4TYIISLFLK Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222 TYPE II MOD Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
211039034L1 Naval Inventory Control Point Mechanicsburg (USA)
801-6758076 ASSY 1A FN22L1 Naval Inventory Control Point Mechanicsburg (USA)
211039034 Naval Sea Systems Command (USA)
Related Parts
5305-01-432-7522INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-01-425-4167?

NSN 5305-01-425-4167 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 5305-01-425-4167?

NSN 5305-01-425-4167 has 10 cross-referenced part numbers: 5/8-11UNRC-3A X 2 1/4TYIISLFLKL1 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 QQ-N-286 GR500L1 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 QQ-N-286 GR500 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 801-6758076 ASSY 1A FN 22 (Naval Sea Systems Command), MIL-DTL-1222 TYPE II MODL1 (Naval Inventory Control Point Mechanicsburg) and 5 more.

What NSN replaces 5305-01-425-4167?

There is 1 known substitute for 5305-01-425-4167: 5305-01-432-7522. Verify interchangeability with system specifications before substitution.

What are the specifications of 5/8-11UNRC-3A X 2 1/4TYIISLFLKL1?

Key specifications for 5/8-11UNRC-3A X 2 1/4TYIISLFLKL1: Thread Quantity Per Inch: 11; Nominal Thread Diameter: 0.625 INCHES IN; Material Document and Classification: QQ-N-286 GR500 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 10 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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