PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803-5001003-X8XX-156Screw,cap,socket Head

Naval Sea Systems Command · NSN 5305-01-477-9035 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-477-9035 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-477-9035. Primary manufacturer part number: 803-5001003-X8XX-156.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Length: 5.250 INCHES NOMINAL IN
  • Material Document and Classification: MIL-S-1222 TY II MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: NICKEL ALLOY OVERALL
  • Thread Direction: RIGHT-HAND
  • Thread Series Designator: UNRC
  • Nominal Thread Diameter: 0.500 INCHES IN
  • Thread Class: 3A A
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 5305-01-477-9035, 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. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-01-477-9035
Primary Part Number803-5001003-X8XX-156
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusCANCELLED
Thread Length5.250 INCHES NOMINAL IN
Material Document and ClassificationMIL-S-1222 TY II MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialNICKEL ALLOY OVERALL
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNRC
Nominal Thread Diameter0.500 INCHES IN
Thread Class3A A
Thread Quantity Per Inch13
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5305-01-642-3063 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
0.500-13UNRC-3A-5.25LG NICUAL Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
803-5001003-X8XX-156 PRIMARY Naval Sea Systems Command (USA)
803-5001003 Naval Sea Systems Command (USA)
Related Parts
5305-01-642-3063INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-01-477-9035?

NSN 5305-01-477-9035 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-01-477-9035?

NSN 5305-01-477-9035 has 3 cross-referenced part numbers: 0.500-13UNRC-3A-5.25LG NICUAL (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 803-5001003-X8XX-156 (Naval Sea Systems Command), 803-5001003 (Naval Sea Systems Command).

What NSN replaces 5305-01-477-9035?

There is 1 known substitute for 5305-01-477-9035: 5305-01-642-3063. Verify interchangeability with system specifications before substitution.

What are the specifications of 803-5001003-X8XX-156?

Key specifications for 803-5001003-X8XX-156: Special Features: USED ON ONE-QUARTER TO TWO AND ONE HALF INCH BALL VALVE; Thread Length: 5.250 INCHES NOMINAL IN; Material Document and Classification: MIL-S-1222 TY II MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: NICKEL ALLOY OVERALL. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-01-477-9035 still in active supply?

NSN 5305-01-477-9035 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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