Rail is part of a climbing protection system used on permanent type ladders, material is stainless steel type 316
NSN 5945-00-797-6321
NSN 4140-00-827-1821
NSN 5895-01-319-4554
NSN 6685-01-626-4601
NSN 6320-00-004-9158
NSN 5965-00-807-2491
NSN 6645-00-733-0667
NSN 6105-01-136-1472
NSN 5935-01-013-4491
NSN 5965-01-114-9086
NSN 6620-00-932-6508
NSN 6105-01-535-7636