The Screw,assembled Washer, cataloged under National Stock Number 5305-01-263-9990, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-263-9990 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN |
| Fastener Length | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Primary Washer Outside Diameter | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| Thread Length | 0.264 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN |
| Hardness Rating | 88.0 ROCKWELL C MINIMUM PRIMARY WASHER |
| Material Document and Classification | QQ-W-321 COMP 6,7,8 FED SPEC ALL MATERIAL RESPONSES FASTENER |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FILLISTER |
| Primary Washer Style | FLAT INTERNAL TEETH |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.013 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL PRIMARY WASHER |
| Surface Treatment | NICKEL FASTENER |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | COPPER ALLOY PRIMARY WASHER |
| Material | COPPER ALLOY 260 OR COPPER ALLOY 270 OR COPPER ALLOY 274 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| Head Diameter | 0.208 INCHES MINIMUM AND 0.226 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 |
| Reference | Meaning |
|---|---|
| 10-101152-68 | 5/9 Secondary reference Unison Industries Llc |
| 10-101152-68 | 5/9 Secondary reference Teledyne Industries Inc Teledyne Power Systems Div |
| 410-2900105-2 | 3/2 Design control — primary reference U.S. Government activity |
| 410-2900105-2 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-263-9990 is a Screw,assembled Washer, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-263-9990: Head Height: 0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN; Fastener Length: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Primary Washer Outside Diameter: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN; Thread Length: 0.264 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN. 21 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.