PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS16203-5Nut,plain,hexagon

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-543-5628 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-543-5628 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-543-5628. Primary manufacturer part number: MS16203-5.
Features
  • Nut,plain,hexagon — FSC 5310
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 310 OR STEEL COMP 316 OVERALL
  • Material Document and Classification: QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-423 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-763 FED SPEC 3RD MATERIAL RESPONSE OR QQ-W-423 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-423 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-763 FED SPEC 6TH MATERIAL RESPONSE OR QQ-W-423 FED SPEC 6TH MATERIAL RESPONSE OVERALL
  • Thread Class: 2B
  • Bearing Surface Type: CHAMFERED
  • Thread Quantity Per Inch: 13
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 or Steel Comp 303 or Steel Comp 304 or Steel Comp 305 or Steel Comp 310 or Steel Comp 316 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-543-5628, is classified within Federal Supply Class 5310 (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 13 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-543-5628
Primary Part NumberMS16203-5
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MaterialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 310 OR STEEL COMP 316 OVERALL
Material Document and ClassificationQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-423 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-763 FED SPEC 3RD MATERIAL RESPONSE OR QQ-W-423 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-423 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-763 FED SPEC 6TH MATERIAL RESPONSE OR QQ-W-423 FED SPEC 6TH MATERIAL RESPONSE OVERALL
Thread Class2B
Bearing Surface TypeCHAMFERED
Thread Quantity Per Inch13
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.500 INCHES IN
Width Across Flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Nut Height0.427 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
Nut StyleHEXAGON
Surface TreatmentPASSIVATE OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5310-00-543-5626 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-543-5627 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-543-5630 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MS16203-5 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MILF19700CLASSCTYPE2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-543-5626INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-543-5627INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-543-5630INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-543-5628?

NSN 5310-00-543-5628 is a Nut,plain,hexagon, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-543-5628?

NSN 5310-00-543-5628 has 2 cross-referenced part numbers: MS16203-5 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MILF19700CLASSCTYPE2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-543-5628?

There are 3 known substitutes for 5310-00-543-5628: 5310-00-543-5626, 5310-00-543-5627, 5310-00-543-5630. Verify interchangeability with system specifications before substitution.

What are the specifications of MS16203-5?

Key specifications for MS16203-5: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 310 OR STEEL COMP 316 OVERALL; Material Document and Classification: QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-423 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-763 FED SPEC 3RD MATERIAL RESPONSE OR QQ-W-423 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-423 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-763 FED SPEC 6TH MATERIAL RESPONSE OR QQ-W-423 FED SPEC 6TH MATERIAL RESPONSE OVERALL; Thread Class: 2B. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-543-5628 still in active supply?

NSN 5310-00-543-5628 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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