The Screw,assembled Washer, cataloged under National Stock Number 5305-00-353-6950, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is United Technologies Corp Electro Systems Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-353-6950 |
| Primary Part Number | SC1563 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | United Technologies Corp Electro Systems Inc |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 0.437 INCHES NOMINAL IN |
| Thread Length | 0.375 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FILLISTER |
| Primary Washer Style | SPLIT HELICAL RING |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.031 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| Head Diameter | 0.250 INCHES NOMINAL 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 |
|---|---|
| SC1563 PRIMARY | United Technologies Corp Electro Systems Inc (USA) |
| 8F538 | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 10-35936-7 | 5/9 Secondary reference Unison Industries Llc |
| SC1563 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| 10-35936-7 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
NSN 5305-00-353-6950 is a Screw,assembled Washer, manufactured by United Technologies Corp Electro Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-353-6950 has 2 manufacturer part numbers on file: SC1563 (United Technologies Corp Electro Systems Inc), 8F538 (Caterpillar Inc Div Caterpillar Defense).
2 possible matches (shared part number, not a government interchangeability claim): 5305-00-436-7679, 5305-00-543-4709. Verify interchangeability with system specifications before substitution.
Key specifications for SC1563: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 0.437 INCHES NOMINAL IN; Thread Length: 0.375 INCHES MINIMUM IN; Nominal Thread Diameter: 0.164 INCHES 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.