The Screw,shoulder, cataloged under National Stock Number 5305-00-175-3754, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-175-3754 |
| Primary Part Number | 14-27028-1 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Head Height | 0.100 INCHES NOMINAL IN |
| Fastener Length | 1.765 INCHES MINIMUM AND 1.795 INCHES MAXIMUM IN |
| Shoulder Length | 1.420 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.274 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.070 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.650 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.885 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 |
|---|---|
| 14-27028-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 14-27028-1 | Preci-Manufacturing, Incorporated (USA) |
| 14-27028-1 | Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing (USA) |
| 14-27028-1 | Caprice Engineering Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 14-27028-1 | 5/9 Secondary reference Alco Machine Co Inc |
| 14-27028-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 14-27028-1 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 5305-00-175-3754 is a Screw,shoulder, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-175-3754 has 4 manufacturer part numbers on file: 14-27028-1 (Northrop Grumman Systems Corporation), 14-27028-1 (Preci-Manufacturing, Incorporated), 14-27028-1 (Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing), 14-27028-1 (Caprice Engineering Company, Inc.).
Key specifications for 14-27028-1: Width Across Flats: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Head Height: 0.100 INCHES NOMINAL IN; Fastener Length: 1.765 INCHES MINIMUM AND 1.795 INCHES MAXIMUM IN; Shoulder Length: 1.420 INCHES NOMINAL FIRST SHOULDER 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.