Aerospace & Automotive Standards Flashcards

Which NAS (National Aerospace Standard) series covers close-tolerance bolts used in aerospace shear applications?

Answer: NAS 6604

NAS 6604 series covers close-tolerance hexagon head bolts used in aerospace shear-critical joints.

In automotive fastener standards, what does SAE J429 Grade 8 require for proof load stress?

Answer: 120,000 psi

SAE J429 Grade 8 bolts must meet a proof load stress of 120,000 psi.

ASTM F2281 covers stainless steel bolts and studs intended for use at elevated temperatures. What is the primary concern addressed?

Answer: Stress relaxation at high temperature

ASTM F2281 specifically addresses stress relaxation behavior of stainless fasteners under elevated temperature service conditions.

Which aerospace standard governs the requirements for self-locking nuts used on aircraft structures under AS9100 quality systems?

Answer: MIL-N-25027

MIL-N-25027 covers self-locking nut requirements including prevailing torque values for aerospace structural applications.

The AIAG (Automotive Industry Action Group) standard for measurement system analysis is referenced in fastener quality programs. What does MSA stand for?

Answer: Measurement System Analysis

MSA stands for Measurement System Analysis and evaluates gauge repeatability and reproducibility in automotive quality systems.

Under Boeing Material Specification (BMS), what coating is typically specified on titanium fasteners to prevent galling during installation?

Answer: Dry film lubricant (PTFE-based)

Titanium fasteners in Boeing specs typically require a dry film lubricant such as PTFE to reduce galling during installation.

SAE AS1515 specifies requirements for which type of aerospace fastener installation tooling?

Answer: Power tool drivers for swaged collar fasteners

SAE AS1515 covers power installation tools used for swaged or pulled collar fasteners such as Hi-Lok and lockbolts.