Blocks up bridge trusses during jacking; used as a foundation for plain rollers during launch; galvanized
NSN 5855-01-180-5369
NSN 6105-01-041-6733
NSN 6610-01-096-7129
NSN 5835-01-469-6706
NSN 6685-00-482-5888
NSN 6685-00-813-9653
NSN 5996-01-598-6274
NSN 5990-00-140-4559
NSN 5990-01-024-9659
NSN 6650-01-424-8048
NSN 6685-00-822-5348
NSN 5965-01-131-7496