>> Search results for: HBG23 NSN Search Results National Stock Number (NSN) Description 2590-01-227-7236, 2590012277236 GUIDE BLOCK 4240-21-921-5614 , 4240219215614 PROTECTOR,HEARING 1 Related Inventory HBG-232590012277236Condition NSGUIDE BLOCK Readily AvailableAdd to RFQ 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