The Screw,shoulder, cataloged under National Stock Number 5305-01-359-4635, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-359-4635 |
| Primary Part Number | 12705-10C-26Z |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Head Height | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Fastener Length | 2.365 INCHES NOMINAL IN |
| Shoulder Length | 1.620 INCHES MINIMUM AND 1.630 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.622 INCHES MINIMUM AND 0.623 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.576 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRC |
| 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 |
|---|---|
| 12705-10C-26Z PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 12705-10C-26U | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-359-4635 is a Screw,shoulder, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-359-4635 has 1 manufacturer part number on file: 12705-10C-26Z (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 12705-10C-26Z: Width Across Flats: 0.312 INCHES NOMINAL IN; Head Height: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 2.365 INCHES NOMINAL IN; Shoulder Length: 1.620 INCHES MINIMUM AND 1.630 INCHES MAXIMUM FIRST SHOULDER IN. 19 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.