MIL-STD-2073 Packaging Levels A, B, and C — When Each Applies

What does each MIL-STD-2073 level protect against?

Level A protects against the most aggressive combination of hazards: long-term storage, repeated handling, sea transport, temperature extremes, salt-air corrosion, biological contamination, and rough mechanical handling. Level B reduces protection for known shorter timelines in controlled environments. Level C is for direct delivery between known parties with minimal handling exposure.

How does a solicitation specify which level applies?

Solicitations reference packaging level via the Special Packaging Instruction Reference Number (SPIRN) in the contract line item. The SPIRN points to a Defense Logistics Agency-maintained packaging instruction that lists the level, applicable preservation method codes (per MIL-STD-2073-1E Table B-I), and any deviations from standard practice. Contractors decode the SPIRN before bidding to determine materials and labor required.

Standard practice on a JTJRE proposal: pull the SPIRN reference, retrieve the linked DLA packaging instruction, list materials required (VCI paper, MIL-PRF-22191 barrier bag, ESD shielding bag, MIL-DTL-117 wrap), document preservation method codes (e.g., method 41 for floating bag, method 50 for greaseproof, etc.), and price labor accordingly. Mismatches between SPIRN spec and proposed approach are a common bid-rejection cause.

What materials does each level typically require?

Materials specifications scale with protection level. Level A typically requires multi-layer barrier material (MIL-PRF-22191 Type II or III), vapor corrosion inhibitor (VCI) papers per MIL-PRF-3420, desiccant per MIL-D-3464, fiberboard or wood outer container per applicable specification, and full labeling per MIL-STD-129R. Levels B and C reduce material count and use lighter outer containers per acceptable practice.

• Level A — barrier material (MIL-PRF-22191), VCI paper (MIL-PRF-3420), desiccant (MIL-D-3464), fiberboard or wood box, full marking
• Level B — barrier bag or shrink wrap, fiberboard outer, standard pallet, reduced marking set
• Level C — kraft paper or polyethylene wrap, corrugated outer, minimum required marking
• All levels — labeling per MIL-STD-129R covering NSN, contract number, manufacturer, quantity, special handling

What labeling and marking is required per MIL-STD-129R?

MIL-STD-129R (Standard Practice for Military Marking for Shipment and Storage) specifies marking content, placement, and durability for all military-packaged items. Required content typically includes National Stock Number (NSN), contract or PO number, manufacturer name and CAGE, item description, quantity, gross weight, and any special handling markings (hazmat, fragile, temperature limits). Bar coding and RFID may be required for high-value or accountable items.