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  1. Methos1979

    Hello, new guy, question about surface discontinuities in fasteners

    I'm still getting some push back on my interpretations of the two specifications. ASTM F879 has verbiage and drawings that show head discontinuities are not permissible when the burst runs from the socket to the edge of the head. The same basic verbiage and drawing is in ASTM F788 but F788 has...
  2. Methos1979

    Hello, new guy, question about surface discontinuities in fasteners

    Excellent - thank you so much. That was very helpful and exactly what I needed to confirm my suspicions.
  3. Methos1979

    Hello, new guy, question about surface discontinuities in fasteners

    Here's a better photo of a similar screw. The 'crack' is no so much a crack under high magnification but rather a 'separation' where I can clearly see the bottom which would seem to indicate it's not likely an actual crack. Is this a...
  4. Methos1979

    Hello, new guy, question about surface discontinuities in fasteners

    Hello, I'm a QC Material Specialist for large underwater communications systems manufacturer. I've run into an issue with regard to some surface features in small stainless steel screws and as to whether they are conforming to the ASTM specs we use. Particularly I'd like some direction on...

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