PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21090-347Screw,cap,socket Head

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-494-2704 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-494-2704 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-494-2704. Primary manufacturer part number: MS21090-347.
Features
  • Screw,cap,socket Head — FSC 5305
  • Minimum Tensile Strength: 60000 POUNDS PER SQUARE INCH LBS
  • Departure From Cited Designator: AS MODIFIED BY MATERIAL AND LOCKING ELEMENT
  • Thread Quantity Per Inch: 32
  • Surface Treatment: CADMIUM AND CHROMATE OVERALL
  • Thread Series Designator: UNF
  • Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
  • Locking Feature: PATCH OR PELLET OR STRIP THREADS
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-494-2704, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-494-2704
Primary Part NumberMS21090-347
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Minimum Tensile Strength60000 POUNDS PER SQUARE INCH LBS
Departure From Cited DesignatorAS MODIFIED BY MATERIAL AND LOCKING ELEMENT
Thread Quantity Per Inch32
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Thread Series DesignatorUNF
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Locking FeaturePATCH OR PELLET OR STRIP THREADS
Internal Drive StyleCROSS RECESS TYPE 1
Nondefinitive Spec/std Data3 TYPE AND 9C STYLE
Head StylePAN
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Nominal Thread Diameter0.190 INCHES IN
Thread DirectionRIGHT-HAND
Thread Class2A A
Head Diameter0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
Head Height0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
Thread Length0.157 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Fastener Length0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5320-00-117-7516NASM21090 INTERCHANGEABLE
Rivet,solid
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-243-6143 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
MS21090-347 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
MS21090-347 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
NASM21090 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
FFS92 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5320-00-117-7516INTERCHANGEABLE
RIVET,SOLID
NASM21090
5305-01-243-6143INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD

Frequently Asked Questions

What is NSN 5305-00-494-2704?

NSN 5305-00-494-2704 is a Screw,cap,socket Head, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-494-2704?

NSN 5305-00-494-2704 has 4 cross-referenced part numbers: MS21090-347 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), MS21090-347 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), NASM21090 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), FFS92 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-00-494-2704?

There are 2 known substitutes for 5305-00-494-2704: 5320-00-117-7516, 5305-01-243-6143. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21090-347?

Key specifications for MS21090-347: Minimum Tensile Strength: 60000 POUNDS PER SQUARE INCH LBS; Departure From Cited Designator: AS MODIFIED BY MATERIAL AND LOCKING ELEMENT; Thread Quantity Per Inch: 32; Surface Treatment: CADMIUM AND CHROMATE OVERALL. 19 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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