Custom 6-Lobe (Torx Alternative) Shoulder Screws in 416 Stainless Steel

 

We had these custom 6-lobe shoulder screws manufactured in 416 stainless steel in the USA for our electronics customer.  DFARS compliant material was used and the parts were heat treated to achieve 26-32 RC.  The 6-lobe drive (T10 size) was made using a combination of broaching and punch, allowing us to bypass cold forming that carries a much longer lead time in our current conditions.  The shoulder measures .13" X .500" in length and the threaded portion is #4-40 with a minimal undercut.  Full certs were included with the parts per our customers requirements.

Custom Partial Thread Socket Shoulder Bolts

 

These custom partial thread socket shoulder bolts were manufactured for our automotive customer using 18-8 stainless steel material and cold formed 3/16 hex socket drive.  Approximately .50" of 5/16-18 thread was incorporated and the shoulder measured .312" in diameter at 1.25" in length.  The threaded section was turned down prior to thread roll operation.  

Grade 12.9 Custom Shoulder Bolts - Metric With Plain Finish

We supplied these Class 12.9 custom shoulder bolts to our aftermarket automotive OEM customer.  The shoulder measures M8 X M6 and the thread is set to M6 X 1.0.  Production typically runs in batches of 10,000 pieces per run and the finish is thermal black oxide.  Full certs are available with the parts upon request.

Custom Dual Shoulder Screws In 316 Stainless Steel Material

These custom dual shoulder screws were manufactured domestically using 316 stainless steel material with plain finish for our medical device customer.  M4-0.7 thread was incorporated at the end of the custom screw with a ball point.  Two raised shoulders were incorporated with the outside diameter of both at .153 +/- .005" - the captive areas between the shoulders were set to an outside diameter of .133 +/- .005".  The head measured .270" X .198" with a standard slotted drive.

Custom Captive Shoulder Screws - 18-8 Stainless Steel Material

These custom captive shoulder screws were manufactured using a modification to a COTS part for our defense customer using 18-8 stainless steel material with standard 2-56 3A thread and standard socket head dimensions.  Length underneath the head was designed to .750" +/- .005" and the shoulder was turned to a diameter of .052-.054", at a length of .066" +/- .005".  The thread had to be chased for each part to ensure smooth thread transitions after the additional shoulder was incorporated.

Custom 316 Stainless Steel Shoulder Screws - 4-40 X 1

We had a small batch of these custom 316 stainless steel shoulder screws produced domestically for our electronics OEM customer. Partial 4-40 thread was incorporated, with a machined shoulder incorporated per our customer specifications. Due to the smaller quantity involved the hex socket drive was broached rather than cold headed - you can see the slight rough nature of the drive when zooming into the photo. The lead time for these parts was relatively fast, with 2-3 weeks for production.

Custom Captive Shoulder Screws - Flat Socket Head In 302HQ DFARS Material

Slightly over 4,000 pieces of these custom captive shoulder screws were made domestically for our aerospace customer.  An MS24671-32 part made using 302HQ DFARS compliant material was used as a base part to create this final version.  Part of the 1/4-20 3A thread was turned down to a shoulder diameter of .175" +/-.005 and length of .339" +/- .015.  .375" of thread remained after the modification.  The resulting captive shoulder screws were then passivated per AMS QQ-P-35 and run through a thread lock patch process per MIL-F-18240.

Custom Length Shoulder Bolts In Stainless Steel - 1/4 X 1"

We supplied these custom length shoulder bolts to our audio device manufacturer.  The shoulder bolt is essentially an off-the-shelf 1/4 X 1 shoulder bolt with 10-24 rolled thread in 18-8 stainless steel material.  Our customer was unable to use this version as-is due to the combined length of threaded portion and the machined fillet preceding it.  In order to make use these parts that combined length had to be at .24"  +/- .01".  As a relatively simple operation we ran these parts through a cut and chamfer operation to get them to the correct length.  Lead time for this operation was 1-2 weeks from receipt of the off-the-shelf version.

Custom Grade 5 Shoulder Bolts - Steel & Commercial Zinc Finish

We supply these custom grade 5 shoulder bolts to our long time customer with recurring annual blanket purchase orders, typically with annual usage ranging between 20,000 and 25,000 pieces.  They are domestically manufactured to a grade 5 standard with commercial zinc, bake and clear chromate finish.  The shoulder measures .40" in diameter by .50" in length, with 5/16-18 thread rolled the balance of the screw.  The overall length is 1-1/4" underneath the head.

Custom Hex Shoulder Screws - 4340 Alloy Steel

We supply these custom hex shoulder screws to our Canadian customer, with the shoulder measuring .425 +/-.002 by 1.650 +.005/-.000 in length.  5/16-18 thread was incorporated measuring .50" in length including the unthreaded portion before the rolled thread begins.  .055 radius hole was then drilled at .102" from the end of the threaded portion.

Custom Grade 5 Hex Cap Screws - 5/16-24 X .875 With Black Oxide Finish

We have supplied these custom grade 5 hex cap screws to our customer for well over 10 years.  The parts are manufactured domestically, with production runs typically covering 50,000 pieces at a time.  The shoulder is critical on these parts, set at .312" in diameter +/- .005" and at 1/4" in length.  Head dimensions slightly off the standard for this size and the finish is black oxide and light oil.  Together with a number of other parts we supply these custom hex cap screws through revolving annual blanket purchase orders that split up the annual usage to match our customer's seasonality.

Custom Socket Shoulder Screws With Thread Locking Nylon Patch - 6-32 X .393" In Grade 2 Material With Phos Finish

These are custom socket shoulder screws made using grade 2 steel material with phos finish and a thread locking patch.  Measuring 6-32 X .393" with a shoulder at .080" and head height at .125" this custom socket shoulder screw is manufactured overseas in increments of 100,000 pieces to be released to our long time customer on an as-needed blanket purchase order basis.  Initial lead time for the first release is typically 120-150 days from order confirmation.  When needed, we can provide a print with dimensions and tolerances for the customer to approve prior to production start.