Custom Captive Screws - Engineered Custom Bolts & Screws https://www.engineeredboltandscrew.com/portfolio-category/custom-made-captive-screws/ Custom bolts and screws - cold headed, hot headed, and machined. Socket head, hex head, shoulder screws, and much more.. Thu, 28 Jan 2021 22:23:00 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 194122415 Custom Stainless Shoulder Captive Screws – Cold Drawn 303 SS https://www.engineeredboltandscrew.com/portfolio/custom-stainless-shoulder-captive-screw-factories/ Thu, 28 Jan 2021 22:21:54 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5223 The post Custom Stainless Shoulder Captive Screws – Cold Drawn 303 SS appeared first on Engineered Custom Bolts & Screws.

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These custom stainless shoulder captive screws were manufactured using cold drawn stainless steel bar stock material with a cold headed head and drive.  6-32 thread was incorporated at 5mm +/- 0.5, with a lead in chamfer per print.  The head was made to 8mm in diameter and 1.5mm in height, with the step shoulder measuring 3.6 in diameter by 2mm in length.  The long captive shoulder was set to 2.3mm +0/-0.2 diameter.  Overall length is 31.5mm and the head featured a #2 phillips drive.

 

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]]> 5223 Custom Double Thread Hardened Turnbuckle Studs – 4140 Steel Material https://www.engineeredboltandscrew.com/portfolio/custom-double-thread-hardened-turnbuckle-studs-4140-steel-material/ Fri, 01 May 2020 19:01:09 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5168 The post Custom Double Thread Hardened Turnbuckle Studs – 4140 Steel Material appeared first on Engineered Custom Bolts & Screws.

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We had 100 pieces of these custom double thread hardened turnbuckle studs produced for our customer in 4140 steel material, hardened to 45-48 HRC.  Local induction heat hardening was performed at the longer hex key, targeting 53-57 HRC. 3/8-24 UNJF 2A thread was rolled with right hand thread on one side and left hand thread on the other.  Overall length was to be between 10.33″ and 10.38″, with the unthreaded portion diameter between .345″ and .375″.

Tricky parts to make and unfortunately on the first production run we production team achieved all the difficult portions of the parts but made the mistake of switching the RH and LH thread sides – we had to quickly work to replace those parts with the thread allocations corrected.  Sometimes the focus is placed on the difficult components and a silly mistake like this is made instead.  Luckily it happens very rarely and when it does we go 110% in fixing or replacing the parts!

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]]> 5168 Custom 316 Stainless Captive Shoulder Screws – M4-0.7 Thread https://www.engineeredboltandscrew.com/portfolio/custom-316-stainless-captive-shoulder-screws/ Tue, 24 Mar 2020 20:50:44 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5154 The post Custom 316 Stainless Captive Shoulder Screws – M4-0.7 Thread appeared first on Engineered Custom Bolts & Screws.

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These custom 316 stainless captive shoulder screws were manufactured domestically with plain finish. The captive shoulder area measured 2.94MM X 12MM +/-.005″ and the M4-0.7 thread covered 8MM of the overall length. Slotted pan head was incorporated per standard IFI dimensions. The metric thread on these parts was cut rather than rolled.

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]]> 5154 Custom Captive Shoulder Screws – 18-8 Stainless Steel Material https://www.engineeredboltandscrew.com/portfolio/custom-captive-shoulder-screws-18-8-stainless-steel-material/ Tue, 24 Mar 2020 20:47:04 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5151 The post Custom Captive Shoulder Screws – 18-8 Stainless Steel Material appeared first on Engineered Custom Bolts & Screws.

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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.

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]]> 5151 Custom Captive Shoulder Screws – Flat Socket Head In 302HQ DFARS Material https://www.engineeredboltandscrew.com/portfolio/custom-captive-shoulder-screws-flat-socket/ Mon, 30 Dec 2019 19:25:49 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5125 The post Custom Captive Shoulder Screws – Flat Socket Head In 302HQ DFARS Material appeared first on Engineered Custom Bolts & Screws.

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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.

Although the parts look relatively simple, some of the modification processes were very difficult to incorporate correctly.  When the shoulder area was turned down to create the shoulder it became apparent that every screw had to get the thread chased one at a time – a very cumbersome and time consuming process.  Parts were provided to our customer with full certs and our internal part number is 6658788-1.

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]]> 5125 Custom Stainless Captive Screws – 10-32 X 3/4 In 18-8 Stainless Steel https://www.engineeredboltandscrew.com/portfolio/custom-stainless-captive-screws/ Fri, 14 Jun 2019 14:40:52 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=5057 The post Custom Stainless Captive Screws – 10-32 X 3/4 In 18-8 Stainless Steel appeared first on Engineered Custom Bolts & Screws.

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These custom stainless captive screws were made using standard off the shelf 10-32 X 3/4″ fully threaded socket cap screws in 18-8 stainless steel material.  The .130-.150″ diameter shoulder was turned down leaving approximately 1/4″ of thread at the end of the screw.  With a relatively loose tolerance on the shoulder diameter this job was a relative breeze and our internal part number is GM-1104-I.

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]]> 5057 Custom Modified Socket Head Screws – M4 X 14MM https://www.engineeredboltandscrew.com/portfolio/custom-modified-socket-head-screws-m4-0-7-x-14mm-socket-head-captive-screw-in-alloy-steel-material/ Mon, 08 Apr 2019 08:50:35 +0000 https://www.machinedhardwaresource.com/?post_type=liquid-portfolio&p=4876 The post Custom Modified Socket Head Screws – M4 X 14MM appeared first on Engineered Custom Bolts & Screws.

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These are custom modified socket head cap screws in alloy steel material.  Standard off the shelf M4-0.7 X 14MM socket head cap screws were modified to allow their use as captive screws with partial thread and modified head dimensions.  The ground shoulder area measures 8.80MM +/- 0.3MM in length and a dimater of 3.30MM +/- 0.15MM.  The head was modified to a diameter of 5.50MM +/- 0.15MM and a height of 4.0MM.  Material certs and a certificate of conformance was provided with the parts per customer’s specifications.

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]]> 4876 Custom Captive Stainless Screws – 10-32 X 1.76 https://www.engineeredboltandscrew.com/portfolio/custom-captive-stainless-screws-10-32-x-1-76/ Fri, 05 Apr 2019 21:27:32 +0000 https://www.engineeredboltandscrew.com/?post_type=liquid-portfolio&p=4990 The post Custom Captive Stainless Screws – 10-32 X 1.76 appeared first on Engineered Custom Bolts & Screws.

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These are custom captive stainless steel screws we supplied to our construction customer, who refers to them as “Gripper Screws”.  Production was done domestically in the USA at approximately 5,000 pieces and a lead time of 6-8 weeks.  The multi-step flat head was made using a cold heading process and the 10-32 thread was rolled at 0.2″ in length.  The diameter of the unthreaded shoulder was set at 0.14″ +/-.015.

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