The Screw,shoulder, cataloged under National Stock Number 5305-00-993-2485, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Ge Aviation Systems Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-993-2485 |
| Primary Part Number | 136945-01 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Shoulder Length | 0.230 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.225 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 56 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.156 INCHES MINIMUM AND 0.172 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 |
|---|---|
| 136945-01 | Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 464478-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-993-2485 is a Screw,shoulder, manufactured by Ge Aviation Systems Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-993-2485 has 1 manufacturer part number on file: 136945-01 (Ge Aviation Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-220-1864. Verify interchangeability with system specifications before substitution.
Key specifications for 136945-01: Fastener Length: 0.500 INCHES NOMINAL IN; Shoulder Length: 0.230 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.225 INCHES MINIMUM IN. 16 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.