The Screw,close Tolerance, cataloged under National Stock Number 5305-01-366-1150, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-366-1150 |
| Primary Part Number | 03A173-3-28P |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN |
| Grip Diameter | 0.3760 INCHES MINIMUM AND 0.3850 INCHES MAXIMUM IN |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.189 INCHES MINIMUM AND 0.190 INCHES MAXIMUM 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 |
|---|---|
| SLB216-3-28P | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| E008-3-28P | Huck International, Inc (USA) |
| AIC1651-3-28P | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 03A173-3-28P PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 03A173-3-28P | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| PBF1416-3-28P | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HR239-3-28P | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| SC3103-3-28P | Howmet Global Fastening Systems Inc (USA) |
| BF0015HC3A-28 | Lfc Industries, Inc. (USA) |
| HR239-3-28P | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| E008-3-28P | 5/9 Secondary reference U.S. Government activity |
| 123742-3-28P | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-366-1150 is a Screw,close Tolerance, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-366-1150 has 10 manufacturer part numbers on file: SLB216-3-28P (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), E008-3-28P (Huck International, Inc), AIC1651-3-28P (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 03A173-3-28P (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 03A173-3-28P (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems) and 5 more.
Key specifications for 03A173-3-28P: Material Document and Classification: AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.190 INCHES IN; Head Style: FLAT COUNTERSUNK; Thread Direction: RIGHT-HAND. 13 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.