The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-009-3971, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-009-3971 |
| Primary Part Number | J642P05B |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Extended Washer Thickness | 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| Width Across Flats | 0.218 INCHES NOMINAL IN |
| Head Height | 0.211 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN |
| Fastener Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Material Document and Classification | C50TF13 CLASS B ALLOY FSCM 99207 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.218 INCHES NOMINAL IN |
| Internal Drive Style | DOUBLE HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 36 |
| Material | NICKEL ALLOY OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.047 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 |
|---|---|
| J642P05B PRIMARY | General Electric Company (USA) |
| J64P05B | J.w. Manufacturing, Inc Dba Arconic Fastening Systems and Rings (USA) |
| J642P05B | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| J642P05B | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-009-3971 is a Screw,cap,socket Head, manufactured by General Electric Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-009-3971 has 3 manufacturer part numbers on file: J642P05B (General Electric Company), J64P05B (J.w. Manufacturing, Inc Dba Arconic Fastening Systems and Rings), J642P05B (Valley-Todeco, Inc. Dba Arconic Fastening Systems).
Key specifications for J642P05B: Surface Finish: 32.0 MICROINCHES THREADS; Extended Washer Thickness: 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN; Width Across Flats: 0.218 INCHES NOMINAL IN; Head Height: 0.211 INCHES MINIMUM AND 0.231 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.