CFS Aerospace & Automotive Standards 3 — Questions and Answers
Question 1: What is the purpose of the DFARS (Defense Federal Acquisition Regulation Supplement) clause related to aerospace fasteners?
- It sets torque requirements for AN bolts
- It restricts the use of specialty metals from non-domestic sources (Correct answer)
- It defines acceptance testing for MIL-spec fasteners
- It governs corrosion protection on military nuts
Correct answer: It restricts the use of specialty metals from non-domestic sources
DFARS specialty metals clauses restrict use of non-domestic source metals (including titanium and nickel alloys) in defense aerospace fasteners.
Question 2: In automotive fastener engineering, IATF 16949 replaced which earlier quality management standard?
- ISO 9001:1994
- QS-9000
- AS9100 Rev C
- ISO/TS 16949 (Correct answer)
Correct answer: ISO/TS 16949
IATF 16949:2016 superseded ISO/TS 16949 as the primary automotive quality management system standard.
Question 3: The Hi-Lok fastener system is classified under which aerospace specification family?
- AN (Air Force-Navy)
- MS (Military Standard)
- NAS (National Aerospace Standard) (Correct answer)
- BACB (Boeing Aircraft)
Correct answer: NAS (National Aerospace Standard)
Hi-Lok and similar two-piece fastener systems are governed by NAS specifications within the National Aerospace Standard family.
Question 4: Which automotive standard defines the fatigue testing requirements for wheel fasteners (wheel studs and lug nuts)?
- SAE J1061
- SAE J2265 (Correct answer)
- ISO 898-1
- ASTM A325
Correct answer: SAE J2265
SAE J2265 defines the fatigue and proof load requirements for wheel fasteners in passenger car and light truck applications.
Question 5: Under ASME B18.2.6M, which metric property class fastener is most commonly specified for automotive structural applications requiring high strength?
- Property Class 4.8
- Property Class 8.8
- Property Class 10.9 (Correct answer)
- Property Class 12.9
Correct answer: Property Class 10.9
Property Class 10.9 is the most commonly specified high-strength metric fastener class in automotive structural assemblies.
Question 6: The Airbus Process Specification AIMS 03-02-003 governs what type of fastener?
- Solid rivets for fuselage skin
- Blind rivets for composite structures
- Titanium alloy bolts for primary structure
- Interference-fit fasteners for wing joints (Correct answer)
Correct answer: Interference-fit fasteners for wing joints
AIMS 03-02-003 covers interference-fit fasteners installed in Airbus wing and primary structural joints to minimize fatigue crack initiation.
Question 7: Which SAE standard covers the performance requirements for self-tapping and thread-forming screws used in automotive body panels?
- SAE J933 (Correct answer)
- SAE J78
- SAE J81
- SAE J1242
Correct answer: SAE J933
SAE J933 specifies performance requirements including drive, thread forming, and pull-out torque for thread-forming and self-tapping screws in sheet metal.
CFS Aerospace & Automotive Standards 3
What is the purpose of the DFARS (Defense Federal Acquisition Regulation Supplement) clause related to aerospace fasteners?