The Back-Up Ring,preformed Packing, cataloged under National Stock Number 5330-01-656-8715, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-656-8715 |
| Primary Part Number | 237916-0001 ITEM 6CP |
| Item Name | Back-Up Ring,preformed Packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 237916-0001 ITEM 6CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 4460331-0121CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 237916-0001 ITEM 6 | 5/1 Secondary reference U.S. Government activity |
| 4460331-0121 | 3/1 Design control — primary reference U.S. Government activity |
| 4460331-0121CP | 5/2 Secondary reference U.S. Government activity |
NSN 5330-01-656-8715 is a Back-Up Ring,preformed Packing, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-656-8715 has 2 manufacturer part numbers on file: 237916-0001 ITEM 6CP (Naval Inventory Control Point Mechanicsburg), 4460331-0121CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 237916-0001 ITEM 6CP: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: BACK-UP RING; End Item Identification: MANIFOLD ASSY; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.