>> Search results for: SPH4AREG NSN Search Results National Stock Number (NSN) Description 8415-01-078-4575, 8415010784575 HELMET,SOUND WAVE PROTECTION 6910-66-097-3787 , 6910660973787 TRAINING AID,HELMET 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information