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Recent content by Steve P
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Flat washer under bolt head
Yes is about contact between washer and bolt shank root radius. The bolt is not CSK. Some washers standards, MS20002 have even two versions, flat and CSK. This standard specifies "CSK for use under head". The question is: Shall we use flat washers under bolt head? What could be the stress and...- Steve P
- Post #6
- Forum: Aircraft engineering
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Flat washer under bolt head
Hi Guys, I came across a design proposal to use thin .016 or .032 NAS1149 (Al or CRES) flat washers under NAS6706A (CRES A286) bolt head in 7050 structure, loose running fit. The fasteners are grouped in patterns, from 6 up to 12 fasteners per group and is shear loading. The bolts need to be...- Steve P
- Thread
- Replies: 11
- Forum: Aircraft engineering
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Paint inside bolt holes
This is a cargo floor, could be as wet and dirty as it gets, scratches, oil, everting. It is not a pressure boundary on itself. Anchor Nut: NAS1791C3-4 (CRES, passivated AMS2700, METHOD 1, CLASS 4, and Lubricated). Screw: ASNA2001T3-xx (6AL-4V, SAA: Sulfuric-acid anodized, Lubricated). Part 1...- Steve P
- Post #7
- Forum: Aircraft engineering
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Paint inside bolt holes
Hi guys, I am new in this forum, but I often follow it and found very interesting information. I have this situation on the Al. floor channels structure when the surface protection is not well defined and is not clear if is need to paint inside fasteners holes. Both holes are drilled at H11, CSK...- Steve P
- Thread
- Replies: 7
- Forum: Aircraft engineering
