The Packing Assembly, cataloged under National Stock Number 5330-00-256-6913, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Control Flow, Inc. Dba Control Flow Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-256-6913 |
| Primary Part Number | A-310738 |
| Item Name | Packing Assembly |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Control Flow, Inc. Dba Control Flow Inc |
| Status | ACTIVE |
| Intermediate Ring Quantity | 3 |
| Outside Diameter | 8.500 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | U INTERMEDIATE RING |
| Cross-Sectional Shape Style | ANGLE BOTTOM RING |
| Inside Diameter | 7.500 INCHES NOMINAL IN |
| Height | 1.875 INCHES NOMINAL IN |
| Material | COTTON INTERMEDIATE RING |
| Material | COTTON BOTTOM RING |
| Material | COTTON TOP RING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A-310738 PRIMARY | Control Flow, Inc. Dba Control Flow Inc (USA) |
| 295015D1200PC28 | Control Flow, Inc. Dba Control Flow Inc (USA) |
| Reference | Meaning |
|---|---|
| 295015D1200PC28 | 5/9 Secondary reference Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division |
| A-310738 | 5/9 Secondary reference Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division |
NSN 5330-00-256-6913 is a Packing Assembly, manufactured by Control Flow, Inc. Dba Control Flow Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-256-6913 has 2 manufacturer part numbers on file: A-310738 (Control Flow, Inc. Dba Control Flow Inc), 295015D1200PC28 (Control Flow, Inc. Dba Control Flow Inc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-357-9872. Verify interchangeability with system specifications before substitution.
Key specifications for A-310738: Intermediate Ring Quantity: 3; Outside Diameter: 8.500 INCHES NOMINAL IN; Cross-Sectional Shape Style: U INTERMEDIATE RING; Cross-Sectional Shape Style: ANGLE BOTTOM RING. 9 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.