The Screw,shoulder, cataloged under National Stock Number 5305-01-314-0892, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Moog Inc. Dba Ampac-Isp Corp. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-314-0892 |
| Primary Part Number | 28856 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Moog Inc. Dba Ampac-Isp Corp |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Head Height | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Fastener Length | 4.750 INCHES NOMINAL IN |
| Shoulder Length | 4.000 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Shoulder Diameter | 0.750 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM FASTENER |
| Single Shear Strength | ERR-060 |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 6 TYPE |
| Locking Feature | PELLET OR PATCH THREADS |
| Surface Treatment | CADMIUM AND CHROMATE FASTENER |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | STEEL FASTENER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.853 INCHES MINIMUM AND 0.875 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 |
|---|---|
| 28856 | John Perine Company Inc. (USA) |
| 1920 | Unbrako (a Division of S P S Technologies Ltd) (GBR) |
| 28856 PRIMARY | Moog Inc. Dba Ampac-Isp Corp (USA) |
| Reference | Meaning |
|---|---|
| 1920 | 5/9 Secondary reference Unbrako Ltd |
| FF-S-86 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-314-0892 is a Screw,shoulder, manufactured by Moog Inc. Dba Ampac-Isp Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-314-0892 has 3 manufacturer part numbers on file: 28856 (John Perine Company Inc.), 1920 (Unbrako (a Division of S P S Technologies Ltd)), 28856 (Moog Inc. Dba Ampac-Isp Corp).
Key specifications for 28856: Width Across Flats: 0.312 INCHES NOMINAL IN; Head Height: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 4.750 INCHES NOMINAL IN; Shoulder Length: 4.000 INCHES NOMINAL FIRST SHOULDER IN. 24 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.