The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-476-9812, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-476-9812 |
| Primary Part Number | 6817320-113 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Fastener Length | 1.687 INCHES MAXIMUM IN |
| Thread Length | 1.687 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286,CL A FED SPEC 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 4 TYPE |
| Locking Feature | PELLET OR STRIP OR PATCH THREADS |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.938 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 |
|---|---|
| 6817320-113 PRIMARY | Naval Sea Systems Command (USA) |
| 6015169 PC 16 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 0.500-13UNC-2AX 1.687IN.K-MONEL | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 6015169-16 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| FF-S-86 | 4/1 Identification reference U.S. Government activity |
| 6817320 ITEM 11 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 0.500-13UNC-2AX1.687IN. K-MONEL | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-476-9812 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-476-9812 has 2 manufacturer part numbers on file: 6817320-113 (Naval Sea Systems Command), 6015169 PC 16 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 6817320-113: Width Across Flats: 0.312 INCHES NOMINAL IN; Fastener Length: 1.687 INCHES MAXIMUM IN; Thread Length: 1.687 INCHES NOMINAL IN; Material Document and Classification: QQ-N-286,CL A FED SPEC 1ST MATERIAL RESPONSE OVERALL. 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.