The Insert,screw Thread, cataloged under National Stock Number 5325-01-009-1604, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-009-1604 |
| Primary Part Number | A51B27179-23 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Width Across Flats | 1.120 INCHES NOMINAL IN |
| Length | 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| Flange Thickness | 0.125 INCHES NOMINAL IN |
| Insert Size | 0.625-18 UNF 2A RH A |
| Style Designator | FLANGE |
| Nominal Thread Size | 0.190 INCHES IN |
| Slot Depth | 0.114 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Slot Width | 0.063 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 |
|---|---|
| A51B27179-23 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51B27179-23 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51B27179-23 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5325-01-009-1604 is a Insert,screw Thread, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-009-1604 has 1 manufacturer part number on file: A51B27179-23 (Northrop Grumman Systems Corporation).
Key specifications for A51B27179-23: Width Across Flats: 1.120 INCHES NOMINAL IN; Length: 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN; Flange Thickness: 0.125 INCHES NOMINAL IN; Insert Size: 0.625-18 UNF 2A RH A. 10 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.