BOLT SELF LOCKING 1/4-28 $0.56 Direct. Hewland Interchange #HC 2375. 1/4-28 Thread. SKU INV-040920 Price $0.56 Quantity Map Reference C10 SYE Catalog Formula Madza Transmission Parts MK Series Transmission Parts MK Series & Webster Maincase Section Formula Mazda Maincase Section (Common with MK Series)