PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

VS2579-1CScrew,cap,socket Head

Howmet Global Fastening Systems Inc Div Torrance Operations · NSN 5305-00-921-0018 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-921-0018 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-921-0018. Primary manufacturer part number: VS2579-1C.
Features
  • Screw,cap,socket Head — FSC 5305
  • Width Across Flats: 0.063 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
  • Thread Quantity Per Inch: 32
  • Countersink Angle: 100.0 DEGREES NOMINAL
  • Surface Treatment: CADMIUM AND CHROMATE OVERALL
  • Material Document and Classification: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
  • Head Style: FLAT COUNTERSUNK
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8740 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-921-0018, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Howmet Global Fastening Systems Inc Div Torrance Operations. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-921-0018
Primary Part NumberVS2579-1C
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerHowmet Global Fastening Systems Inc Div Torrance Operations
StatusACTIVE
Width Across Flats0.063 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
Thread Quantity Per Inch32
Countersink Angle100.0 DEGREES NOMINAL
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Material Document and ClassificationAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Hardness Rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
Head StyleFLAT COUNTERSUNK
Fastener Length0.343 INCHES NOMINAL IN
Head Diameter0.249 INCHES MINIMUM AND 0.259 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Class3A A
Thread Length0.343 INCHES MAXIMUM IN
Internal Drive StyleHEXAGON
Thread DirectionRIGHT-HAND
MaterialSTEEL COMP 8740 OVERALL
Nominal Thread Diameter0.138 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-108-9346177039-65 INTERCHANGEABLE
Bearing,ball,annular
Naval Sea Systems Command
8010-00-133-5414 INTERCHANGEABLE
Thinner,paint Products
6110-00-152-8967S8 INTERCHANGEABLE
Panel,power Distribution
Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co
3110-00-155-8869056-9 INTERCHANGEABLE
Bearing,ball,annular
Lockheed Martin Corporation Div Rms - Mitchel Field
5120-00-241-3188 INTERCHANGEABLE
Nutdriver
5120-00-269-7971 INTERCHANGEABLE
Universal Joint,socket Wrench at
2520-00-422-9585 INTERCHANGEABLE
Sleeve Assy,sliding
4820-00-986-6972S-8 INTERCHANGEABLE
Valve,linear,directional Control
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
5975-01-116-0590 INTERCHANGEABLE
Plate,wall,electrical
5120-01-335-1043JHWS-140A INTERCHANGEABLE
Universal Joint,socket Wrench at
Williams J H Industrial Products Inc
Cross-Reference Index
Part NumberManufacturer
VS2579-1C PRIMARY Howmet Global Fastening Systems Inc Div Torrance Operations (USA)
S8 Textron Systems Corporation Dba Textron Systems Corp (USA)
Related Parts
3110-00-108-9346INTERCHANGEABLE
BEARING,BALL,ANNULAR
177039-65
8010-00-133-5414INTERCHANGEABLE
THINNER,PAINT PRODUCTS
6110-00-152-8967INTERCHANGEABLE
PANEL,POWER DISTRIBUTION
S8
3110-00-155-8869INTERCHANGEABLE
BEARING,BALL,ANNULAR
056-9
5120-00-241-3188INTERCHANGEABLE
NUTDRIVER
5120-00-269-7971INTERCHANGEABLE
UNIVERSAL JOINT,SOCKET WRENCH AT
2520-00-422-9585INTERCHANGEABLE
SLEEVE ASSY,SLIDING
4820-00-986-6972INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
S-8
5975-01-116-0590INTERCHANGEABLE
PLATE,WALL,ELECTRICAL
5120-01-335-1043INTERCHANGEABLE
UNIVERSAL JOINT,SOCKET WRENCH AT
JHWS-140A
4820-01-355-0374INTERCHANGEABLE
VALVE,CHECK
S8-1/2IN
6530-01-365-2081INTERCHANGEABLE
BOTTLE,SAFETY CAP
ASCR-8

Frequently Asked Questions

What is NSN 5305-00-921-0018?

NSN 5305-00-921-0018 is a Screw,cap,socket Head, manufactured by Howmet Global Fastening Systems Inc Div Torrance Operations, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-921-0018?

NSN 5305-00-921-0018 has 2 cross-referenced part numbers: VS2579-1C (Howmet Global Fastening Systems Inc Div Torrance Operations), S8 (Textron Systems Corporation Dba Textron Systems Corp).

What NSN replaces 5305-00-921-0018?

There are 12 known substitutes for 5305-00-921-0018: 3110-00-108-9346, 8010-00-133-5414, 6110-00-152-8967 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of VS2579-1C?

Key specifications for VS2579-1C: Width Across Flats: 0.063 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Thread Quantity Per Inch: 32; Countersink Angle: 100.0 DEGREES NOMINAL; Surface Treatment: CADMIUM AND CHROMATE OVERALL. 16 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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