PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFS85AMEND2TYPE2STYLE10PGRADE2Screw,cap,hexagon Head

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5305-00-266-6306 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-266-6306 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-266-6306. Primary manufacturer part number: FFS85AMEND2TYPE2STYLE10PGRADE2.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Thread Direction: RIGHT-HAND
  • Thread Length: 0.750 INCHES NOMINAL IN
  • Hardness Rating: 100.0 ROCKWELL B MAXIMUM OVERALL
  • Material: STEEL OVERALL
  • Nondefinitive Spec/std Data: II TYPE AND 10P STYLE AND 2 GRADE
  • Width Between Flats: 0.428 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
  • Thread Series Designator: UNF
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 5305-00-266-6306, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 14 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
NSN5305-00-266-6306
Primary Part NumberFFS85AMEND2TYPE2STYLE10PGRADE2
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Thread DirectionRIGHT-HAND
Thread Length0.750 INCHES NOMINAL IN
Hardness Rating100.0 ROCKWELL B MAXIMUM OVERALL
MaterialSTEEL OVERALL
Nondefinitive Spec/std DataII TYPE AND 10P STYLE AND 2 GRADE
Width Between Flats0.428 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
Thread Series DesignatorUNF
Head StyleHEXAGON
Nominal Thread Diameter0.250 INCHES IN
Head Height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
Fastener Length0.750 INCHES NOMINAL IN
Minimum Tensile Strength69000 POUNDS PER SQUARE INCH LBS
Thread Class2A A
Thread Quantity Per Inch28
Lifecycle & Compliance
Acquisition StatusACTIVE
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
5305-00-266-6348 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-266-6361 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-266-6408 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
FFS85AMEND2TYPE2STYLE10PGRADE2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MS35290-6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
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
5305-00-266-6348INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-266-6361INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-266-6408INTERCHANGEABLE
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 5305-00-266-6306?

NSN 5305-00-266-6306 is a Screw,cap,hexagon Head, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-266-6306?

NSN 5305-00-266-6306 has 2 cross-referenced part numbers: FFS85AMEND2TYPE2STYLE10PGRADE2 (Federal Specifications Promulgated by General Services Administration Washington DC), MS35290-6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5305-00-266-6306?

There are 12 known substitutes for 5305-00-266-6306: 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 FFS85AMEND2TYPE2STYLE10PGRADE2?

Key specifications for FFS85AMEND2TYPE2STYLE10PGRADE2: Thread Direction: RIGHT-HAND; Thread Length: 0.750 INCHES NOMINAL IN; Hardness Rating: 100.0 ROCKWELL B MAXIMUM OVERALL; Material: STEEL OVERALL. 14 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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