Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Kenneth

    Grade 10.9 bolt

    What's the boron content of 10B30? I note that ISO 898-1 limits the boron content of material used to fabricate property class 10.9 fasteners to .003% (.005% provided that "non-effective boron is controlled by addition of titanium and/or aluminum").
  2. Kenneth

    Grade 10.9 bolt

    Does "equivalency" require grademarking (marking with "10.9") or representing/selling the parts as meeting Grade 10.9? If so, manufacturing bolts to anything less than the full requirments of the ISO standard is a SEROIUS crime punishable by both civil and criminal penalties per the Fastener...
  3. Kenneth

    Iconel 718 Bolts

    thread338-18000
  4. Kenneth

    Electrical Conductivity Values for Magnesium Alloys??

    http://www.ndt-ed.org/GeneralResources/MaterialProperties/ET/ET_matlprop_Magnesium.htm
  5. Kenneth

    un-explainable breaking fastener

    Lurchalot: Re-read midsidenode's original post: A delayed failure mecahanism is at work here, most likely hydrogen embrittlement as suggested above. This is not a "simple" overtorque failure.
  6. Kenneth

    Short bolts on space shuttle Atlantis

    From the FRR Briefing Transcript: QUESTIONER: Traci Watson, USA Today, for Wayne Hale. First, a clarification. When you talked about the bolts that had only two-thirds of the thread or one-and-a-half threads engaged, was that on the KU antenna, or was that somewhere else? I missed that. MR...
  7. Kenneth

    Short bolts on space shuttle Atlantis

    Based on the available information, I wouldn’t personally characterize anything about this situation as "perfectly adequate" (an oxymoron?). While it was apparently "adequate" for 25 flights (based solely on the absence of a catastrophic failure), what about the 26th? The "it worked last time"...
  8. Kenneth

    Short bolts on space shuttle Atlantis

    Wayne Hale (http://www.nasa.gov/centers/kennedy/about/biographies/hale.html), excerpted from the Post Flight Readiness Review Briefing Transcript (http://www.nasa.gov/pdf/154909main_postFRRtranscript%20_2.pdf); "Some 25 or 30 years ago, a mistake was made in the design of this particular...
  9. Kenneth

    The End of Mil-Hdbk-5

    Like MMPDS-02, ESDU00932 isn't free either: http://engineers.ihs.com/engineering/newsletters/esdu/esdu-issue08-06.jsp and http://www.esdu.com/cgi-bin/ps.pl?sess=unlicensed_1060801190352snh&t=ser&p=mmdh
  10. Kenneth

    303 vs 304

    thread1135-140919
  11. Kenneth

    Bolt Hex vs Wrench Size

    http://catalog.asme.org/Codes/PrintBook/B10717M_1997_Gages_Wrench.cfm
  12. Kenneth

    Steel friction reference

    How about the whole book?(http://www.alibris.com/search/search.cfm?qtit=Handbook%20of%20Engineering&qauth=Esbach%2COvid&qsort=r)
  13. Kenneth

    #1 Phillips Dimensions

    http://assist.daps.dla.mil/docimages/0000/53/03/37630.pd8
  14. Kenneth

    Aircraft Lightning Protection

    From Lightning a weighty issue for the 787 at http://seattlepi.nwsource.com/business/277220_air12.html:
  15. Kenneth

    Unusual Thread Profile

    Couple of reason why not: "Normal" bolts are thread rolled, for cost and other reasons. The asymmetrical buttress thread does not lend itself to thread rolling with acceptable tool life or without developing unacceptable defects. "Cut" threads both cost more to make in large quantities and...
  16. Kenneth

    Threaded key inserts, Need hard material

    While a higher strength insert material may minimize insert stripping at the present bolt thread length of engagement and torque level, check to make sure that that your test guys are using bolts of adequate length to fully engage the internal insert threads when installed in your stackup(s)...
  17. Kenneth

    Tap drill sizes for UNJF threads

    A cutting tap does not cut/form the minor diameter, just the flank angles and major diameter. The pre-tap hole diameter is not a "pilot" hole, it is critical and must meet the modified minor diameter requirements of the UNJ thread prior to tapping. Don't think I've ever seen roll taps...
  18. Kenneth

    Unusual Thread Profile

    A literature search (and/or a little bit of pondering) will confirm that thread flank angle has a direct influence on resistance to loosening in a vibratory environment.
  19. Kenneth

    Threaded key inserts, Need hard material

    I note that SPS lists Inconel 718, 17-4 PH and Titanium as material options on page three of their document I linked above (first link). But I'll hazard to guess these may be vendor parts numbers and/or "specials" that will have limited sources and availability (and higher costs/leadtimes)...
  20. Kenneth

    Threaded key inserts, Need hard material

    Key-locking threaded inserts manufactured from A-286 are widely used in aerospace under NAS1395 and MS51830 part numbers. A-286 is a highly "durable" material... http://www.spstech.com/aero/prod_lit/insert_brochure.pdf...

Part and Inventory Search

Back
Top