The Packing Nut, cataloged under National Stock Number 4730-00-203-3085, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Salem Manufacturing & Sales Inc Div Salem Manufacturing and Sales Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-203-3085 |
| Primary Part Number | ADH5637 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Salem Manufacturing & Sales Inc Div Salem Manufacturing and Sales Inc |
| Status | ACTIVE |
| Material Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Hole or Slot Quantity | 8 |
| Strength Rating | ERR-060 |
| Largest Inside Diameter | 1.969 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN |
| Thread Length | 0.094 INCHES NOMINAL IN |
| Style Designator | ROUND, INTERNAL THREAD, SHOULDERED |
| Smallest Outside Diameter | 1.620 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1.375-12 |
| Screw Thread Series Designator | UNF |
| Major Unthreaded Outside Diameter | 1.875 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | STEEL |
| Slot Width | 0.188 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ADH5637 PRIMARY | Salem Manufacturing & Sales Inc Div Salem Manufacturing and Sales Inc (USA) |
| Reference | Meaning |
|---|---|
| 16101698 | 5/9 Secondary reference U.S. Government activity |
| 16101698 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
| ADH5637 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-203-3085 is a Packing Nut, manufactured by Salem Manufacturing & Sales Inc Div Salem Manufacturing and Sales Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-203-3085 has 1 manufacturer part number on file: ADH5637 (Salem Manufacturing & Sales Inc Div Salem Manufacturing and Sales Inc).
Key specifications for ADH5637: Material Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Hole or Slot Quantity: 8; Strength Rating: ERR-060; Largest Inside Diameter: 1.969 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.