source for low quantity custom bolt 2

[dgowans]

I'm looking for a prototype source for a custom bolt. I need to obtain a small quantity of an 18-18 bolt. According to the information I could dig up (which isn't much), this is a thread that was standard a long time ago but has since been obsoleted. I looked in a Machinery's handbook from 1964 and this thread wasn't listed so I assume it went obsolete before then.

This thread is somewhere between a 1/4-20 and a 5/16-18 - I've seen 5/16-18 threaded rod re-tapped on the end to make an 18-18, but that's not what I want.

We've got production quantity quotes in and the lead time is understandably rather long. We have an immediate need for some of these bolts to go on customer samples of a new product and I'm looking to get my hands on a small quantity of these. If anyone could point me toward a shop that does this kind of custom work I'd be most appreciative.

 

[dgowans]

Cliffy,

That's awesome! I think I may have found local people to do this, but this is at least a confirmation of what I've found on the 'net. Needless to say, I was going to verify everything from this highly reliable source.

I found a link that gave the major diameter of .294 and the minor diameter of .2218 but until this point haven't taken the time to inspect the few samples we do have. I needed to find someone who at least said they thought they could do it.....

 

[JohnNabors]

Dgowans-

I've been at this crap for 26 years and never knew that was how that major diameters of numbered threads was derived. I emailed my Dad (a retired tool and die maker) and asked him if he knew about that formula. I then went on and (the Devil made me do it) told him that it is just possible that he made your really ancient piece of equipment.

He hasn't answered me yet, but I'm sure this will be good. We worked for the same company at the time of his retirement, and when one of the machinists would come to him for help with a trig problem he would reply, "Well, the way Pythagoras explained it to me was..."

John Nabors

"Against stupidity the very gods themselves contend in vain." - Friedrich von Schiller

 

[cliffy]

Good news. BTW where/what is the link where you found the info? I couldn't find anything on the 'net.
PS how many parts of what length/configuration do you need?

My hovercraft is full of eels.

 

[tomwalz]

We think we can do it. I checked with the shop. However they can only thread about 2".

Let me know if this helps.

tom

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

 

[berkshire]

dgowans (Mechanical)
I found some thread information on your screw thread in an old Starret book (1934) it gives the thread standard as ASME special. The standard was #18-16, #18-18 and #18-20
The thread details for the #18-18 are: Outside diameter .302". Size of drill for outside diameter of screw letter N. size of drill for tapping hole #1-.228"
If this is useful here it is, however I suspect you already know this.
B.E.

 

[boo1]

The following manufacturers typically will produce Aerospace bolts and screws to NAS, MS, or NA specifications, as well as custom fasteners.

Air Industries, Garden Grove, CA. (714) 892 5571
Ameritech Fastener Mfg. Inc., Houston, TX (713) 939 7638
B&B Specialties Inc., Anaheim, CA. (714) 993 1600
BEK Level 1 Inc., Huntington, WV (304) 697 2323
NDT certs from BEK Level 1 Fasteners not acceptable.
Butler Inc., Gardena, CA (310) 323 3114
California Screw Products, Paramount, CA. (213) 633 6626
CBS Fasteners, Anaheim, CA (714) 779 6368
Champion Fasteners, Inc., Mount Holly, NJ (800) 755 2693
Fairchild Fasteners, Torrance, CA (310) 784 3453
Fastener Innovation Technology (FIT) Inc., Gardena, CA (310) 538 1111
Fastener Technology Corp., N. Hollywood, CA. (818) 764 6467
Federal Manufacturing Corp., Chatsworth, CA (818) 341 9825
Hi-Shear Corp., Torrance, CA (310) 326 8110
Huck Aerospace Fasteners, Lakewood, CA (310) 421 3711
Ideal Fasteners Inc., Anaheim, CA (714) 630 7840
J.I. Morris Co., Southbridge, MA (508) 764 4394
LFC Industries, Inc., Arlington, TX (817) 640 1322
Maney Aircraft, GS Aerospace Division, Ontario, CA (909) 390 2500
Mercury Aerospace Fasteners, N. Hollywood, CA (818) 982 4800
Use of fasteners currently in stock only
MS Aerospace, Burbank, CA (818) 953 9080
P.B. Fasteners, Gardena, CA (310) 323 6222
Pilgrim Screw Corp., Providence, RI (401) 274 4090
1.0 GSFC APPROVED MANUFACTURERS, continued
Quality Aircraft Screw, Corona, CA (909) 270 3210
Rocket Air Supply, Inc., Arlington, TX (817) 640 5340
Saturn Fasteners, Burbank, CA (818) 846 7145
Screwcorp/Fairchild, City of Industry, CA (818) 369 3333
SPS Technologies, Jenkintown, PA (215) 572 3133
SPS Technologies-Western, Santa Ana, CA (714) 545 9311
Valley Todeco, Sylmar, CA (818) 367 2261
Van Petty, Inc., Newberry Park, CA (805) 498 4594
3V Fasteners, Corona, CA (909) 734 4391
West Coast Aerospace, Wilmington, CA (310) 518 3167