The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-688-2371, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fastener Technology Corp. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-688-2371 |
| Primary Part Number | FTC7761N06-7B |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastener Technology Corp |
| Status | ACTIVE |
| Extended Washer Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Width Across Flats | 0.109 INCHES NOMINAL IN |
| Head Height | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Fastener Length | 0.408 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OR AMS2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Thread Length | 0.336 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5640 ASSN STD SINGLE MATERIAL RESPONSE RING |
| Nominal Thread Diameter | 0.1380 INCHES IN |
| Features Provided | WASHER |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING FASTENER |
| Material | STEEL COMP 303 RING |
| Thread Series Designator | UNRC |
| Head Diameter | 0.218 INCHES MINIMUM AND 0.226 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 |
|---|---|
| FTC7761N06-7B PRIMARY | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| FTC7761 | D/9 Drawing number reference only Fastener Technology Corp |
NSN 5305-01-688-2371 is a Screw,cap,socket Head, manufactured by Fastener Technology Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-688-2371 has 1 manufacturer part number on file: FTC7761N06-7B (Fastener Technology Corp).
Key specifications for FTC7761N06-7B: Extended Washer Thickness: 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN; Width Across Flats: 0.109 INCHES NOMINAL IN; Head Height: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN; Fastener Length: 0.408 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN. 21 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.