PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51100-2Screw,cap,hexagon Head

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-01-369-9501 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-369-9501 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-369-9501. Primary manufacturer part number: MS51100-2.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Minimum Tensile Strength: 70000 POUNDS PER SQUARE INCH LBS
  • Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
  • Fastener Length: 0.404 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
  • Material Document and Classification: FF-S-85 FED SPEC ALL MATERIAL RESPONSES OVERALL
  • Nondefinitive Spec/std Data: 2 TYPE AND 10P STYLE
  • Surface Treatment: PASSIVATE OVERALL
  • Thread Series Designator: UNF
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 410 or Steel Comp 416 or Steel Comp 430 Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-369-9501, 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 23 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-369-9501
Primary Part NumberMS51100-2
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
StatusACTIVE
Minimum Tensile Strength70000 POUNDS PER SQUARE INCH LBS
Hardness Rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
Fastener Length0.404 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
Material Document and ClassificationFF-S-85 FED SPEC ALL MATERIAL RESPONSES OVERALL
Nondefinitive Spec/std Data2 TYPE AND 10P STYLE
Surface TreatmentPASSIVATE OVERALL
Thread Series DesignatorUNF
Hole Configuration StyleHEXAGON FLATS
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Head Height0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
MaterialSTEEL COMP 410 OR STEEL COMP 416 OR STEEL COMP 430 OVERALL
Thread Length0.359 INCHES NOMINAL IN
Nominal Thread Diameter0.250 INCHES IN
Head StyleHEXAGON
Hole Quantity1
Features ProvidedFINISHED HEAD
Minimum Yield Strength40000 POUNDS PER SQUARE INCH LBS
Thread Class2A A
Thread Quantity Per Inch28
Hole Diameter0.060 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Width Between Flats0.612 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
Hole TypeDRILLED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5305-00-012-2104 INTERCHANGEABLE
Screw,cap,hexagon Head
5306-00-225-84986022232 INTERCHANGEABLE
Bolt,machine
New Venture Gear Inc New Process Gear Div
5305-00-514-7632 INTERCHANGEABLE
Screw,cap,hexagon Head
5306-00-637-8775100-15S6-4 INTERCHANGEABLE
Bolt,machine
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5305-01-332-1507B1821BH063F200L INTERCHANGEABLE
Screw,cap,hexagon Head
The American Society of Mechanical Engineers
Cross-Reference Index
Part NumberManufacturer
MS51100-2 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
FF-S-85 TYPE II STYLE 10P Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FF-S-85 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5305-00-012-2104INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5306-00-225-8498INTERCHANGEABLE
BOLT,MACHINE
6022232
5305-00-514-7632INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5306-00-637-8775INTERCHANGEABLE
BOLT,MACHINE
100-15S6-4
5305-01-332-1507INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
B1821BH063F200L

Frequently Asked Questions

What is NSN 5305-01-369-9501?

NSN 5305-01-369-9501 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: active.

What are the part numbers for NSN 5305-01-369-9501?

NSN 5305-01-369-9501 has 3 cross-referenced part numbers: MS51100-2 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FF-S-85 TYPE II STYLE 10P (Federal Specifications Promulgated by General Services Administration Washington DC), FF-S-85 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-01-369-9501?

There are 5 known substitutes for 5305-01-369-9501: 5305-00-012-2104, 5306-00-225-8498, 5305-00-514-7632 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51100-2?

Key specifications for MS51100-2: Minimum Tensile Strength: 70000 POUNDS PER SQUARE INCH LBS; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL; Fastener Length: 0.404 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN; Material Document and Classification: FF-S-85 FED SPEC ALL MATERIAL RESPONSES OVERALL. 23 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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