The Screw Assembly,panel, cataloged under National Stock Number 5305-01-331-7581, 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 30 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-331-7581 |
| Primary Part Number | FT1056-110A |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fastener Technology Corp |
| Status | ACTIVE |
| Head Height | 0.133 INCHES NOMINAL IN |
| Fastener Length | 1.047 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| Surface Treatment Document and Classification | MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| Surface Treatment Document and Classification | MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| Surface Treatment Document and Classification | MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| Material Accommodated Thickness | 0.032 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN |
| Thread Length | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A580 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| Material Document and Classification | MIL-S-23195 MIL SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | OXIDE FASTENER |
| Surface Treatment | PASSIVATE SPRING |
| Surface Treatment | OXIDE PRIMARY WASHER |
| Surface Treatment | OXIDE STAND-OFF |
| Surface Treatment | OXIDE SECONDARY WASHER |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 301 SECONDARY WASHER |
| Material | STEEL COMP 302 SPRING |
| Material | STEEL COMP 304 STAND-OFF |
| Material | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 384 FASTENER |
| Material | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 384 PRIMARY WASHER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.405 INCHES MINIMUM AND 0.425 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 |
|---|---|
| FT1056-110A PRIMARY | Fastener Technology Corp (USA) |
| 868197-110 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 868197-0110 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| 868197-110 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
| 868197-0110 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5305-01-331-7581 is a Screw Assembly,panel, manufactured by Fastener Technology Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-331-7581 has 2 manufacturer part numbers on file: FT1056-110A (Fastener Technology Corp), 868197-110 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for FT1056-110A: Head Height: 0.133 INCHES NOMINAL IN; Fastener Length: 1.047 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING. 30 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.