The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-077-9659, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Prestolite Electric Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-077-9659 |
| Primary Part Number | 78991 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Head Height | 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Fastener Length | 5.320 INCHES MINIMUM AND 5.440 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 120000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 92000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 78991 PRIMARY | Prestolite Electric Inc (USA) |
| Reference | Meaning |
|---|---|
| A104-078991 | 5/9 Secondary reference Prestolite Electric Inc |
| 78991 | 5/9 Secondary reference Prestolite Electric Inc |
NSN 5305-01-077-9659 is a Screw,cap,hexagon Head, manufactured by Prestolite Electric Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-077-9659 has 1 manufacturer part number on file: 78991 (Prestolite Electric Inc).
Key specifications for 78991: Head Height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Fastener Length: 5.320 INCHES MINIMUM AND 5.440 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.750 INCHES MINIMUM IN. 16 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.