PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS35290-168Screw,cap,hexagon Head

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-00-266-6408 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-266-6408 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-266-6408. Primary manufacturer part number: MS35290-168.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Head Style: HEXAGON
  • Minimum Tensile Strength: 64000 POUNDS PER SQUARE INCH LBS
  • Hardness Rating: 100.0 ROCKWELL B MAXIMUM OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Material Document and Classification: SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Minimum Yield Strength: 52000 POUNDS PER SQUARE INCH LBS
  • Material: STEEL OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-266-6408, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 15 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: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-266-6408
Primary Part NumberMS35290-168
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Head StyleHEXAGON
Minimum Tensile Strength64000 POUNDS PER SQUARE INCH LBS
Hardness Rating100.0 ROCKWELL B MAXIMUM OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Material Document and ClassificationSAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Minimum Yield Strength52000 POUNDS PER SQUARE INCH LBS
MaterialSTEEL OVERALL
Nominal Thread Diameter0.625 INCHES IN
Head Height0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN
Width Between Flats0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
Thread Quantity Per Inch11
Thread Length1.500 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Fastener Length3.000 INCHES NOMINAL IN
Thread Class2A A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-261-1868 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-261-1898 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-261-1916 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-261-1971 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-261-1997 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-266-6306 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-266-6348 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-266-6361 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-270-7554 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-550-1425 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
MS35290-168 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
FFS85AMEND2TYPE2STYLE10PGRADE2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5305-00-261-1868INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-261-1898INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-261-1916INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-261-1971INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-261-1997INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-266-6306INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-266-6348INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-266-6361INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-270-7554INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-550-1425INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-558-7347INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-577-5448INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5305-00-266-6408?

NSN 5305-00-266-6408 is a Screw,cap,hexagon Head, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-266-6408?

NSN 5305-00-266-6408 has 2 cross-referenced part numbers: MS35290-168 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FFS85AMEND2TYPE2STYLE10PGRADE2 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-00-266-6408?

There are 12 known substitutes for 5305-00-266-6408: 5305-00-261-1868, 5305-00-261-1898, 5305-00-261-1916 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS35290-168?

Key specifications for MS35290-168: Head Style: HEXAGON; Minimum Tensile Strength: 64000 POUNDS PER SQUARE INCH LBS; Hardness Rating: 100.0 ROCKWELL B MAXIMUM OVERALL; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-266-6408 still in active supply?

NSN 5305-00-266-6408 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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