15BF10204 up for sale is a set of  4 H-K USA  stainless steel socket head cap screws used on the navy dry deck shelter , see photos of this unit in our listing photos , these are 3/8-16 full threaded x 1 inch under the head, see public specs below,  these appear to have lock tight on the threads for locking ,

covered under nsn 5305-01-291-4516 , 
Buyer to pay calculated shipping and packing to your locations, see our store for more items like this click below, we will work with you to save on shipping for multiple item purchases, Thank you RWK