PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

845-4687407 PC 243Screw,cap,hexagon Head

Naval Sea Systems Command · NSN 5305-01-671-4578 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-671-4578 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-671-4578. Primary manufacturer part number: 845-4687407 PC 243.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • 11 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-671-4578, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. This item has 11 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameScrew,cap,hexagon Head
FSC / FSG5305 — No Item Name Available (FSG 53)
ManufacturersNaval Sea Systems Command (CAGE 53711); Naval Inventory Control Point Mechanicsburg (CAGE 03950); Electric Boat Corporation Div General Dynamics Electric Boat (CAGE 96169); Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M (CAGE 81349); Naval Ship Systems Command (CAGE 80064)
Technical Specifications
ParameterValue
NSN5305-01-671-4578
Primary Part Number845-4687407 PC 243
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5305-01-491-2100845-4687407 PC 243 INTERCHANGEABLE
Screw,externally Relieved Body
Naval Sea Systems Command
5305-01-501-9381 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
845-4687407 PC 243 Naval Sea Systems Command (USA)
0.500-13UNC-3AX1.250LG NICUD4 Naval Inventory Control Point Mechanicsburg (USA)
7383858-264179203-0243 Naval Sea Systems Command (USA)
H547-0001-264179203-0243 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
0.500-13UNC-3AX1.250LG NICU Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
H547-0001-264179203-0243D4 Naval Inventory Control Point Mechanicsburg (USA)
7383858-264179203-0243D4 Naval Inventory Control Point Mechanicsburg (USA)
845-4687407 PC 243 Naval Ship Systems Command (USA)
2641-792-03 PC 243D4 Naval Inventory Control Point Mechanicsburg (USA)
2641-792-03 PC 243 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
845-4687407 PC 243D4 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5305-01-491-2100INTERCHANGEABLE
SCREW,EXTERNALLY RELIEVED BODY
845-4687407 PC 243
5305-01-501-9381INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-01-671-4578?

NSN 5305-01-671-4578 is a Screw,cap,hexagon Head, manufactured by Naval Sea Systems Command, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-671-4578?

NSN 5305-01-671-4578 has 11 cross-referenced part numbers: 845-4687407 PC 243 (Naval Sea Systems Command), 0.500-13UNC-3AX1.250LG NICUD4 (Naval Inventory Control Point Mechanicsburg), 7383858-264179203-0243 (Naval Sea Systems Command), H547-0001-264179203-0243 (Electric Boat Corporation Div General Dynamics Electric Boat), 0.500-13UNC-3AX1.250LG NICU (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 6 more.

What NSN replaces 5305-01-671-4578?

There are 2 known substitutes for 5305-01-671-4578: 5305-01-491-2100, 5305-01-501-9381. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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