Cage 0hr25 kochek co. Stated they are in fact the oem for this item.
No other part numbers with same form, fit, and function found.
A straight one-piece metallic pipe 12 inches(304 mm)or less in length having external threads of the same size on both ends. It may have a center section which is externally shaped to accommodate a wrench. For pipe having internal threads 12 inches(304 mm)or less in length see coupling,pipe. For pipe in excess of 12 inches(304 mm)see pipe as modified.
NSN 5975-00-296-5040
NSN 5950-00-410-4312
NSN 5945-01-028-8622
NSN 4140-00-669-6109
NSN 4140-00-242-6465
NSN 4140-00-356-1639
NSN 6105-01-522-9244
NSN 5990-00-382-5885
NSN 7035-01-337-8128
NSN 5960-01-087-2376
NSN 5965-00-518-0958
NSN 6320-01-411-7456