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 32tpi Socket Head Cap Screws - 4140 Material With 37-44 Hardness And 1/4-32 Thread Pitch

These are custom 32tpi socket head cap screws we supplied to our automotive prototyping customer.  4140 plain alloy material was used to produce a small batch of just 25 pieces domestically in the USA.  The 1/4-32 thread pitch was really the only tricky part requiring a custom production run.  Speed was absolutely critical to our customer and we were able to get the parts made and shipped within 2 weeks from order confirmation.

Custom 4140 Flat Socket Head Screws - Custom 1/4-28 X .595" Flat Socket Screws For Aerospace Applications

These custom 4140 flat socket head cap screws were produced domestically for our aerospace customer using AISI 4140 alloy steel material per AMS 6349.  Heat treat to 160-180 ksi per AMS 2759 was performed to finalize the production process.  Magnetic particle inspection per ASTM 1444 (Type I, Meth A, Sens Lev 3) was performed after the machining process was completed.  Lead time for this part varies significantly based on how busy the manufacturing and testing facilities are at the time of start.

Custom 4140 Steel Shoulder Bolts - M11.5 X 136MM With Special Hex Head, 37-44 RC, Special Dog Point

These are custom 4140 steel shoulder bolts we supplied to our automotive customer at 100 pieces.  4140 steel material was used with heat treat to achieve 37-44 RC, with plain finish.  The shoulder measured M11.5 x 136MM with a 1.15MM groove approximately 35MM from the special hex head.  The special dog point measures 10.447MM/10.540MM by 5.7MM in length.  Lead time for this 100 piece domestic batch was approximately 6 weeks from order confirmation.