The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-688-2384, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-688-2384 |
| Primary Part Number | FTK7157HH12-16A |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastener Technology Corp |
| Status | ACTIVE |
| Extended Washer Thickness | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Fastener Length | 1.975 INCHES MINIMUM AND 2.065 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.560 INCHES NOMINAL IN |
| Thread Length | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE AND AMS5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | MS35338 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM-A-582 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5640 ASSN STD SINGLE MATERIAL RESPONSE RING |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | SLEEVE AND LOCK WASHER AND FLAT WASHER |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Locking Feature | LOCKWASHER HEAD |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING FASTENER |
| Material | STEEL CORROSION RESISTING RING |
| Material | STEEL CORROSION RESISTING PRIMARY WASHER |
| Material | STEEL CORROSION RESISTING SECONDARY WASHER |
| 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 |
|---|---|
| FTK7157HH12-16A PRIMARY | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| FTK7157 | D/9 Drawing number reference only Fastener Technology Corp |
NSN 5305-01-688-2384 is a Screw,cap,hexagon Head, manufactured by Fastener Technology Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-688-2384 has 1 manufacturer part number on file: FTK7157HH12-16A (Fastener Technology Corp).
Key specifications for FTK7157HH12-16A: Extended Washer Thickness: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Fastener Length: 1.975 INCHES MINIMUM AND 2.065 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Extended Washer Diameter: 0.560 INCHES NOMINAL IN. 23 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.