Custom Stainless Steel Fully Threaded Lag Screws

 

We had 10,000 pieces of each size of these custom stainless steel fully threaded lag screws supplied to our construction customer.  304 stainless steel material was used and the parts were manufactured to ASME B18.2.1 other than the full thread feature requirement.  Tensile strength was required to surpass the minimum 90,000 psi requirement and both the material composition and the tensile strength (axial) were tested at a third party lab with full certs.  The two sizes pictured here are the 3/8-7 X 4" and 3/8-7 X 5.5".  The finish on both sizes is Geomet 321 with Plus L top coat.

Custom Long Stainless Steel Dowel Pins - 303 Stainless Steel

 

These custom long stainless steel dowel pins were manufacture domestically using 303 stainless steel material.  The diameter was set to 2.002mm to 2.008mm and the length was set to 100mm +/-.01mm.  Full certs were provided with the parts and thorough QC testing was done on the straightness.

Custom Double Thread Lag Screws - 1/2 X 10.75"

 

Production of these custom double thread lag screws for our construction customer was run in batches of 50,000 pieces using medium carbon steel material with zinc + clear finish.  Overall length measured 10.75" +/- 0.20" and 1/2-6 lag screw thread was incorporated at one side, with the other side using rolled 1/2-13 thread.  Approximately 5.5" of lag thread was designed into the part and 1.2" of the machine screw thread.  The crimped shoulder was set to a height of .37" +/-.02" and a length of .625" to allow use of a wrench during the application.  

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 Hardened Dowel Pins - SAE 52100 Steel Material

 

We supplied our automotive manufacturing customer these custom hardened dowel pins in SAE 52100 steel material, heat treated to reach 81.0 - 83.5 HRA.  The diameter was ground to 7.000MM +/- .005MM and the length was set to 32.0MM +/- 0.2MM.  The pins were manufactured domestically in the USA and full certs were provided with the shipment.  

Custom Long Socket Head Machine Screws - 8-32 & 8-36 Thread In 4140 Alloy Steel

 

These custom long socket head machine screws were manufactured domestically using 4140 alloy steel material with heat treatment to reach 37-44 Rc hardness.  Two sizes were produced together in this run: 8-32 X 5.43" length with thread length of 5/8" and 8-36 (an odd thread pitch requested for this one) X 6-3/8" with the same 5/8" thread length requirement.  The thread was cut rather than rolled for these parts and the hex drive was broached.  

Custom Large B7 Threaded Studs - 1-1/5 X 6-1/4" With Zinc Clear Finish

 

We had 64 pieces of these custom large B7 threaded studs manufactured for our customer, with the cut and chamfer of the plain parts done domestically followed by commercial zinc + clear plating operation.  The threaded studs measured 1-1/5 - 8 X 6-1/4 and were supplied with ASTM A194 2H heavy hex nuts.  The cut and chamfer operation was relatively easy and quick but the zinc plating process took approximately 2 weeks to complete.  Rush processing is available if a quicker turnaround is ever required.

Custom Automotive Ball Studs - 1215 Steel, Zinc Yellow

 We had 20,000 pieces of these custom automotive ball studs produced in 1215 steel material with heat treat hardening to 25-34 HRC and zinc yellow finish.  The across the flats dimension on this ball stad was relatively large compared with the .25" ball diameter, measuring .437 +/-.01".  Overall length measured .950" with the 1/4-28 thread taking up approximately .423".  

Custom Grade 5 Lug Nuts - 5/16-24 Thread

 

We supplied approximately 21,000 pieces of these custom grade 5 lug nuts to our customer, manufactured using medium carbon steel material with zinc clear finish.  Blue thread lock patch was applied at 360 degrees across the length of internal thread per customer specifications.  An 82 degree angle was maintained at the cone side and .500" width across the flats.  Overall length (height) of the lug nut was also set to .500".  Full certs were available with the parts.

Custom 316 Stainless Steel Button Head Screws - Metric

These custom 316 stainless steel button head screws were manufactured domestically using ASTM A240 spec raw material.  All dimensions and tolerances were to a drawing provided by our customer.  M2.5 X .45 thread was incorporated (cut thread) with thread length set to 8MM.  Head diameter was set to 4.50MM-4.7MM and head height at 1.36MM-1.50MM.  Note that the button head was actually fully machined rather than the typical cold headed operation.  The hex socket drive was broached as a result.  Full certs were provided to our customer per request.

Custom Automotive Ball Studs In Grade 5 Steel With Zinc Yellow Finish

We had 15,000 pieces of these custom automotive ball studs produced in 1215 medium carbon steel material with heat treatment to achieve 25-34 HRC hardness.  10-32 thread (2A fit) was rolled for these parts and the hex was made to .311" across the flats.  Overall length of the part measured .815" and the ball diameter was set to .25".  

Custom 6-Lobe Socket Head Screws - 4140 Alloy Steel Material

These custom 6-lobe socket head screws were manufactured domestically using 4140 alloy steel material with heat treat to 42-47 HRC.  2A 6-48 UNS thread was incorporated with thread length at .375".  T15 6-lobe drive was cold formed and the thread rolled.  This part is almost identical with the .200" length version discussed in an earlier post.  Full certs were provided with the parts per our customer's requirements.  

Custom Lag Thread Bent Anchors - Steel Zinc Material

These custom lag thread bent anchors were manufactured for a woodworking company in Hawaii that required lag screw thread on the long leg and a cosmetically appealing zinc clear finish.  CD-C1018 material was used at a 1/4" in diameter, with a 90 degree bend.  The short leg measured 3/4" in length on the inside and the long leg at 5" overall including the 3/4" of lag screw thread.  All production was done domestically on these parts for the fastest turnaround.

Custom Black Thumb Screws - Knurled 6-32 X 3/8

These custom black thumb screws with diamond knurl were manufactured to our customer's drawing at 2,000 pieces using low carbon steel material with black oxide finish.  The head diameter is set to .313" +/- .005" and the thread length is .375" with the same tolerance.  6-32 thread was rolled rather than cut on these parts.  Full certs were provided with the parts.

Custom 4037 Alloy Steel Flat Socket Head Screws With Cadmium Plating

We had 5,000 pcs of these custom 4037 alloy steel flat socket head screws produced in the USA for our aerospace customer.  ASTM A574 4037 material was used for the production and the cadmium plating was dome per AMS-QQ-P-416A TYpe II, with thickness at 0.0005-.0008".  Heat treat was performed to get the hardness of the parts to Rc 41-45.  The socket drive was cold formed and the thread rolled, both at the same facility.  Full certs were provided with the parts per our customer's requirements.

Custom Torx 6-48 Socket Head Screws - 4140 Alloy Steel Material

These custom torx 6-48 socket head cap screws were manufactured domestically using 4140 alloy steel material with heat treat to 42-47 HRC.  2A 6-48 UNS thread was incorporated with thread length at .200".  T15 6-lobe drive was cold formed and the thread rolled.  Full certs were provided with the parts per our customer's requirements.  

Custom Domestic L Anchor Bolts - ASTM A675 Grade 80

We supplied approximately 450 pieces of these custom domestic L anchor bolts to our construction engineering customer, with full certs.  The parts had to be domestic made using domestic melt material as well in ASTM A675 Grade 80 steel, with plain finish.  1/2-13 thread was incorporated on the 15" long leg, with 13.5" of actual thread - having to cut this length of thread on each piece made the production process significantly slower.  The short leg measured 2".

Custom ACME Thread Studs - 1-1/4" in A108 Steel Material

These are large custom ACME thread studs we supplied our customer in two different lengths: 2 ft 11 inch and 3 ft 5 inch.  Both lengths were fully threaded with 1-1/4" ACME thread.  3 custom tapped heavy hex nuts per piece were supplied with the threaded studs.  Parts were made in the USA and were supplied with material certs.

Custom Double Thread Hardened Turnbuckle Studs - 4140 Steel Material

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".

Custom Large Grade 5 Threaded Stud Socket Bolts - 1"-8 Thread With Zinc Clear Finish

Total production of these custom large grade 5 threaded stud socket bolts was run at approximately 27,000 pieces using grade 5 steel material per SAE J429 with zinc clear finish per ASTM B633 Type III.  Overall length of the bolts was 6" and a .566-.573" socket drive was incorporated on one side.  Core hardness was tested a number of times to confirm Rc25-34 and proof load testing was done at three separate labs to confirm 85,000 psi minimum.  Full certs were provided with the parts.

Custom Metric Dacromet Coated U-Bolts - M4 X 52.07MM

We had 1,100 pieces of these custom metric dacromet coated u-bolts produced using 42CrMo  material with heat treat hardening.  The part was originally designed to be made using 17-4PH stainless steel material but a number of attempts resulted in multiple failures during bending - the material was too hard and repeatedly snapped as the tool pressed the 90 degree corners.  As a result we switched to the 42CrMo material with heat treat to obtain the required hardness and strength, with a combination of the dacromet coating to achieve the corrosion resistance needed.  Turned out to be a much trickier part than originally anticipated!

Custom Construction Bent Anchors - 1-1/4" by 39.37" In A36 Material

These custom construction bent anchors were manufactured domestically using A36 material with plain finish.  1-1/4" bar stock was used and the threaded portion was turned down to allow for cutting M42 thread.  Overall length was set at 1,000MM or 39.37", with the outside hook measuring 180MM.  Tricky part to bend within tolerance but ended up turning out great.  Two heavy hex nuts and washers per anchor bolt were included with the shipment.

Custom Class 12.9 Metric Aerospace Screws With Cad Plated Finish - M5 - 0.8MM Thread

These custom class 12.9 metric aerospace screws with cad plated finish were manufactured domestically using DFARS compliant 4140 alloy steel material per ASTM A108.  1,100 pieces were produced measuring 5M X 0.8MM X 16.15MM +/0.03MM.  6G class thread was rolled and the head incorporated a cold formed socket drive, fine knurl feature, and a .050" diameter through hole.  Parts were run through a cadmium plating process at .0003/.0005" type II, Class 2 per AMS QQ-P-416, followed by non destructive magnetic particle inspection testing per ASTM-E-1444.  Full certs and FAIR was provided with the parts.

Custom 1"-8 Grade 5 Serrated Hex Flange Nuts With Zinc Clear Finish

These custom 1"-8 grade 5 serrated hex flange nuts were produced at approximately 27,000 pieces, with zinc clear finish per ASTM B633 Type III.  Full certs were provided with the parts to document surface and core hardness, material chemical properties, proof load, and certificate of conformance.  3rd party lab testing was also procured to confirm all factory documentation.  The nuts were required to pass a 72,000 psi min proof load requirement and core hardness of 32 Rc max.  Outside diameter was set at 1.95"-2.00" and overall nut height at .700"-.730".

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 Internally Threaded Socket Head Screws - 304 Stainless Steel

These custom internally threaded socket head screws were manufactured domestically using 304 stainless steel material with plain finish.  Outside thread was M12-1.75 and the internal thread was set to M8-1.25, threaded all the way through.  10MM X 4MM deep hex socket drive was incorporated with a broach process.  For very high volume production this part would likely be made using a cold headed process instead for the hex drive.

Custom Slotted Internally & Externally Threaded Studs

We supply five different size configurations of these custom slotted internally & externally threaded studs to our construction customer.  45K plain steel material is used to produce the parts, with plain and light oil finish.  This specific slotted stud incorporates 1/4-20 internal thread and 1/2-13 external thread.  Both sides are slotted and an extended outer chamfer is required on one side to allow easier installation and removal in the application.  While the different variations have other external thread diameters and length they share the same 1/4-20 internal thread requirement.

Custom 316 Stainless Captive Shoulder Screws - M4-0.7 Thread

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.

Custom Precision Dowel Pins In 18-8 Stainless Steel Material

We had 3,200 pieces of these custom precision dowel pins made domestically for our medical device customer using 18-8 stainless steel material with plain finish.  Overall length was set to .240" +/- .005" and the diameter was set to .092" +/-.005".  These were relatively simple parts and the lead time was much faster than the more involved parts that require a special finish.  Full certs were provided with the parts.

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 4140 Precision 10-24 Nuts - AISI 4140 Material With Plain Finish

We supplied our defense customer with these custom 4140 precision 10-24 nuts after getting an initial sample run completed and tested. Tight tolerances were required on these parts, with most dimensions at +.000/-.005 or +.000/-.003 inches. Overall thickness of the nuts was set at .155" and 10-24 class 2B thread tapped all the way through. Full production of this part was at 20,000 pieces and lead time at approximately 75-90 days from order confirmation.

Custom 17-4PH Double Shoulder Bolts - Hex Socket Drive With 5/16-24 Thread

We supplied our aerospace customer 200 pieces of these custom 17-4PH double shoulder bolts. 17-4 PH material heat treated to condition H1100 was used for the domestic production of these parts, with resulting hardness between 34 and 36 HRC. Passivation per QQ-P-35 was performed to complete the production process. The hex socket drive was cold headed and the 5/16-24 thread rolled per customer requirements. Full certs were provided with the shipments.

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 Slotted Round Metric Screws - M7 X 1.0 X 34.5MM In Mild Steel With Black Oxide

These custom slotted round metric screws were manufactured using a cold heading process mild steel material, finished with a black oxide treatment. 90-92 degree angle was incorporated underneath the head, which had an outside diameter of 13.37MM-13.80MM and overall height of 5.15MM max inclusive of the undercut portion. Full M7 X 1.0M thread was rolled to a 6G thread fit. The slotted drive was designed to 1.81MM-2.06MM width and depth of 2.5MM at minimum. Our internal part number for this custom metric machine screw is MMSO-07035-F.

Custom Cone Point Screws - 8-32 Slotted Machine Screw In 18-8 Stainless Steel

These custom cone point screws were manufactured using 304 stainless steel material with plain finish.  8-32 fine thread was incorporated with the overall length of the threaded portion and the cone point set at .2925"-.3125".  The head diameter was .306"-.322" and slot depth at .045"-.058".  Head height was set at .085"-.096".  Production was completed at just over 13,000 pieces within 8 weeks from order.

Custom Long 316 Stainless Steel Screws - 8-32 X 3 Socket Head Cap Screws

These are custom long 316 stainless steel screws at 8-32 X 3 in dimensions, manufactured domestically at a small batch of approximately 40 pieces.  The parts were completed in a relatively quick turnaround time-frame of approximately 4 weeks from order, especially considering the holiday timing.  To allow for the small quantity and speed the hex socket drive was broached instead of using a cold headed approach.  You can see evidence of this at the inside of the recess drive where you would see machining marks instead of the typical clean concave interior seen in cold headed parts.  The partial thread was also cut rather than rolled to allow for the short production run option.