The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-732-4773, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corp Integrated Systems Sector. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-732-4773 |
| Primary Part Number | NGS551AN5-16C6 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corp Integrated Systems Sector |
| Status | ACTIVE |
| Width Across Flats | 0.1408 INCHES MINIMUM AND 0.1426 INCHES MAXIMUM IN |
| Head Height | 0.134 INCHES NOMINAL IN |
| Fastener Length | 1.633 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.633 INCHES NOMINAL IN |
| Material Document and Classification | AMS5678 AEROSPACE MATERIAL SPEC STD 2ND MATERIAL RESPONSE SPRING |
| Material Document and Classification | AMS5844 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE BODY |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Features Provided | DRY FILM LUBRICANT |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | DOUBLE HEXAGON |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING SPRING |
| Material | COBALT COMP MP-35-N BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.6320 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 |
|---|---|
| NGS551AN5-16C6 PRIMARY | Northrop Grumman Systems Corp Integrated Systems Sector (USA) |
| Reference | Meaning |
|---|---|
| NGS551AN | D/9 Drawing number reference only Northrop Grumman Systems Corp Integrated Systems Sector |
| RT293-5-16C6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-732-4773 is a Screw,cap,socket Head, manufactured by Northrop Grumman Systems Corp Integrated Systems Sector, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-732-4773 has 1 manufacturer part number on file: NGS551AN5-16C6 (Northrop Grumman Systems Corp Integrated Systems Sector).
3 possible matches (shared part number, not a government interchangeability claim): 5305-01-732-4817, 5305-01-732-4834, 5305-01-732-4979. Verify interchangeability with system specifications before substitution.
Key specifications for NGS551AN5-16C6: Width Across Flats: 0.1408 INCHES MINIMUM AND 0.1426 INCHES MAXIMUM IN; Head Height: 0.134 INCHES NOMINAL IN; Fastener Length: 1.633 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 20 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.