PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51096-421Screw,cap,hexagon Head

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-00-145-6379 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-145-6379 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-145-6379. Primary manufacturer part number: MS51096-421.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Nominal Thread Diameter: 0.500 INCHES IN
  • Head Style: HEXAGON
  • Hole Diameter: 0.092 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
  • Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL
  • Hole Configuration Style: HEXAGON FLATS
  • Material: STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
  • Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1013 or Steel Comp 1015 or Steel Comp 1016 or Steel Comp 1017 or Steel Comp 1018 or Steel Comp 1019 or Steel Comp 1020 or Steel Comp 1021 or Steel Comp 1022 or Steel Comp 1023 or Steel Comp 1524 or Steel Comp 1025 or Steel Comp 1026 or Steel Comp 1527 or Steel Comp 1029 or Steel Comp 1030 or Steel Comp 1033 or Steel Comp 1034 or Steel Comp 1035 or Steel Comp 1536 or Steel Comp 1037 or Steel Comp 1038 or Steel Comp 1039 or Steel Comp 1040 or Steel Comp 1541 Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-145-6379, 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 22 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
NSN5305-00-145-6379
Primary Part NumberMS51096-421
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
Nominal Thread Diameter0.500 INCHES IN
Head StyleHEXAGON
Hole Diameter0.092 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
Material Document and Classification66 FED STD ALL MATERIAL RESPONSES OVERALL
Hole Configuration StyleHEXAGON FLATS
MaterialSTEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
Hardness Rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
Surface Finish63.0 MICROINCHES THREADS
Nondefinitive Spec/std Data2 TYPE AND 10P STYLE AND 5 GRADE
Thread Series DesignatorUNF
Thread Quantity Per Inch20
Surface Treatment Document and ClassificationQQ-P-416 TY 2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread DirectionRIGHT-HAND
Hole TypeDRILLED
Thread Class2A A
Minimum Tensile Strength120000 POUNDS PER SQUARE INCH LBS
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Hole Quantity1
Width Between Flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
Head Height0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
Thread Length1.250 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN
Fastener Length3.156 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5305-00-018-1703 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-022-4057 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-207-2095 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-281-9340 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-00-297-0724595540 INTERCHANGEABLE
Screw,cap,hexagon Head
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
MS51096-421 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
FF-S-85C TY II ST 10P Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FFS85 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5305-00-018-1703INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-022-4057INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-207-2095INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-281-9340INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-00-297-0724INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
595540

Frequently Asked Questions

What is NSN 5305-00-145-6379?

NSN 5305-00-145-6379 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 5305-00-145-6379?

NSN 5305-00-145-6379 has 3 cross-referenced part numbers: MS51096-421 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FF-S-85C TY II ST 10P (Federal Specifications Promulgated by General Services Administration Washington DC), FFS85 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-00-145-6379?

There are 5 known substitutes for 5305-00-145-6379: 5305-00-018-1703, 5305-00-022-4057, 5305-00-207-2095 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51096-421?

Key specifications for MS51096-421: Nominal Thread Diameter: 0.500 INCHES IN; Head Style: HEXAGON; Hole Diameter: 0.092 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL. 22 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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