PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FF-R-556Rivet,solid

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5320-00-256-6403 · FSC 5320 · No Item Name Available
Verified by PartsTable
NSN 5320-00-256-6403 — this item is cataloged by the U.S. Government under National Stock Number 5320-00-256-6403. Primary manufacturer part number: FF-R-556.
Features
  • Rivet,solid — FSC 5320
  • Head Major Diameter: 0.303 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
  • Material: STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1524 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1035 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
  • Surface Treatment: TIN OVERALL
  • Fastener Length: 0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
  • Head Style: FLAT/TINNER'S
  • Hardness Rating: 60.0 ROCKWELL B MAXIMUM OVERALL
  • Shear Strength: 44000 SINGLE POUNDS PER SQUARE INCH
Applications
  • Applications requiring Steel Comp 1006 or Steel Comp 1008 or Steel Comp 1010 or Steel Comp 1012 or Steel Comp 1524 or Steel Comp 1527 or Steel Comp 1030 or Steel Comp 1033 or Steel Comp 1035 or Steel Comp 1038 or Steel Comp 1040 or Steel Comp 1541 Overall construction
General Description

The Rivet,solid, cataloged under National Stock Number 5320-00-256-6403, is classified within Federal Supply Class 5320 (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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5320-00-256-6403
Primary Part NumberFF-R-556
Item NameRivet,solid
FSC / FSG5320 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Head Major Diameter0.303 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
MaterialSTEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1524 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1035 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
Surface TreatmentTIN OVERALL
Fastener Length0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
Head StyleFLAT/TINNER'S
Hardness Rating60.0 ROCKWELL B MAXIMUM OVERALL
Shear Strength44000 SINGLE POUNDS PER SQUARE INCH
Nondefinitive Spec/std Data4 TYPE
Shank StyleSTRAIGHT
Shank Diameter0.154 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
Head Height0.059 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
3110-00-555-5221104490 INTERCHANGEABLE
Bearing,ball,annular
Mcculloch Corp
4820-01-146-7906104490 INTERCHANGEABLE
Stem,fluid Valve
William Powell Company, the Dba Powell Valve Div the Starflo Corporation
Cross-Reference Index
Part NumberManufacturer
FF-R-556 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
B18.1.1 3.0 LB TINNER TABLE6 STL American National Standards Institute Incorporated Dba American National Standards Institute (USA)
MS51931-21 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
J492 TABLE 7 TINNER 3 LB AMS7225 Sae International Dba Sae International (USA)
FF-R-556 TY4GRESZ3LB General Services Administration Federal Supply Service (USA)
J492 TABLE 7 TINNER 3 LB AMS7225 Society of Automotive Engineers Inc (USA)
104490 General Motors Corp (USA)
Related Parts
3110-00-555-5221INTERCHANGEABLE
BEARING,BALL,ANNULAR
104490
4820-01-146-7906INTERCHANGEABLE
STEM,FLUID VALVE
104490

Frequently Asked Questions

What is NSN 5320-00-256-6403?

NSN 5320-00-256-6403 is a Rivet,solid, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5320 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5320-00-256-6403?

NSN 5320-00-256-6403 has 7 cross-referenced part numbers: FF-R-556 (Federal Specifications Promulgated by General Services Administration Washington DC), B18.1.1 3.0 LB TINNER TABLE6 STL (American National Standards Institute Incorporated Dba American National Standards Institute), MS51931-21 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), J492 TABLE 7 TINNER 3 LB AMS7225 (Sae International Dba Sae International), FF-R-556 TY4GRESZ3LB (General Services Administration Federal Supply Service) and 2 more.

What NSN replaces 5320-00-256-6403?

There are 2 known substitutes for 5320-00-256-6403: 3110-00-555-5221, 4820-01-146-7906. Verify interchangeability with system specifications before substitution.

What are the specifications of FF-R-556?

Key specifications for FF-R-556: Head Major Diameter: 0.303 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN; Material: STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1524 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1035 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL; Surface Treatment: TIN OVERALL; Fastener Length: 0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5320-00-256-6403 still in active supply?

NSN 5320-00-256-6403 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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