STANDARD, THREADED FASTENERS, TORQUE LIMITS FOR

Published date

01-01-1992

Publisher

National Aeronautics and Space Administration

1 Scope
2 Applicable Documents
3 Definitions
  3.1 Breakaway Torque
  3.2 Fastening System
  3.3 Free Running Torque
  3.4 Installation Torque
  3.5 Locking Device
  3.6 Self-Locking
  3.7 Self-Locking Torque
  3.8 Shear Application
  3.9 Tensile Application
  3.10 Torque Installation Sequence
  3.11 Verification Torque
4 Requirements
  4.1 Torque Limits
  4.2 Torque Wrenches
  4.3 Installation
  4.4 Lubricants
  4.5 Designer Information
Appendix A
A1. Scope
A2. Historical Background
A3. Detailed Requirements
     A3.1 Torque Values for Standard and High Strength Steel
          Threaded Fastener Systems
     A3.2 Torque Values for 300 Series Corrosion Resistant Steel
          (CRES) Threaded Fastener Systems
     A3.3 Torque Values for 62 ksi Tensile Strength Aluminium
          Alloy Threaded Fasteners, (2024-T4 and 7075-T6)
     A3.4 Torque Values for UNS K66286 (A286) Fastener Systems
     A3.5 Torque Values for UNS N07718 (Alloy 718) Fastener
          Systems
     A3.6 Torque Values for UNS R30035 (MP35N) Fastener Systems
     A3.7 Torque Values for #2 Through #10 Thread Sizes
     A3.8 Table Torque Values
     A3.9 Safety Wiring and Cotter Pinning
A4. Notes
     A4.1 Approved Lubricants
     A4.2 Retorquing/Reuse
     A4.3 Tables III-IX
     A4.4 Table XI
     A4.5 Electrical Connectors
Appendix B
B1. Scope
B2. Referenced Documents
B3. Definitions
     B3.1 Abutment
B4. General Requirements
     B4.1 Test Apparatus
     B4.2 Test Specimens
B5. Detailed Requirements
     B5.1 Test Procedures
     B5.2 Retorquing
B6. Reports
Appendix C
C1. Scope

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.

DocumentType	Standard
PublisherName	National Aeronautics and Space Administration
Status	Current

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