We provided our aerospace customer two variations of these custom 8740 steel phil flat screws, made using 8740 material per MIL-S-6049 with cadmium plating per QQ-P-416 Type I Class 2.  NSN-53505-01-093-0290 measured 10-32 X .713″ while NSN-5305-01-093-2450 measured 10-32 X .837″.  Both parts were manufactured domestically with full certs.