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NASA MSFC STD 486:1992

NASA MSFC STD 486:1992 Standard, Threaded Fasteners, Torque Limits For Establishes acceptable torque limits for threaded fasteners used in space vehicles and support equipment, methodology for establishing acceptable torque limits for same, and criteria for the use of to

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Table of Contents

1Scope
2ApplicableDocuments
3Definitions
3.1BreakawayTorque
3.2FasteningSystem
3.3FreeRunningTorque
3.4InstallationTorque
3.5LockingDevice
3.6Self-Locking
3.7Self-LockingTorque
3.8ShearApplication
3.9TensileApplication
3.10TorqueInstallationSequence
3.11VerificationTorque
4Requirements
4.1TorqueLimits
4.2TorqueWrenches
4.3Installation
4.4Lubricants
4.5DesignerInformation
AppendixA
A1.Scope
A2.HistoricalBackground
A3.DetailedRequirements
A3.1TorqueValuesforStandardandHighStrengthSteel
ThreadedFastenerSystems
A3.2TorqueValuesfor300SeriesCorrosionResistantSteel
(CRES)ThreadedFastenerSystems
A3.3TorqueValuesfor62ksiTensileStrengthAluminium
AlloyThreadedFasteners,(2024-T4and7075-T6)
A3.4TorqueValuesforUNSK66286(A286)FastenerSystems
A3.5TorqueValuesforUNSN07718(Alloy718)Fastener
Systems
A3.6TorqueValuesforUNSR30035(MP35N)FastenerSystems
A3.7TorqueValuesfor#2Through#10ThreadSizes
A3.8TableTorqueValues
A3.9SafetyWiringandCotterPinning
A4.Notes
A4.1ApprovedLubricants
A4.2Retorquing/Reuse
A4.3TablesIII-IX
A4.4TableXI
A4.5ElectricalConnectors
AppendixB
B1.Scope
B2.ReferencedDocuments
B3.Definitions
B3.1Abutment
B4.GeneralRequirements
B4.1TestApparatus
B4.2TestSpecimens
B5.DetailedRequirements
B5.1TestProcedures
B5.2Retorquing
B6.Reports
AppendixC
C1.Scope

Abstract

Establishes acceptable torque limits for threaded fasteners used in space vehicles and support equipment, methodology for establishing acceptable torque limits for same, and criteria for the use of torque wrenches and other torque indicating devices on such fasteners.

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