Small quantity special fasteners like this Invar 36 Socket Cap Screw measuring 6-32 X 1/4 are a perfect project us. Typically used by our customer for preliminary testing purposes, specials like this are produced by our long time trusted factory sources selected based on the exact quantity, material requested, and lead time required. These Invar 36 screws were purchased at 40 pieces and were shipped within 8 days of original order. Please think of us for any similar needs you may have!