The Screw,machine, cataloged under National Stock Number 5305-01-520-8704, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is 3-V Fastener Co., Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-520-8704 |
| Primary Part Number | BACS12CK3-12 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | 3-V Fastener Co., Inc. |
| Status | ACTIVE |
| Head Height | 0.110 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Locking Feature Material Document and Classification | MIL-DTL-18240, TYPE P MIL SPEC SINGLE MATERIAL RESPONSE |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Screw Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.250 INCHES NOMINAL IN |
| Locking Feature Material | PLASTIC POLYAMIDE NYLON |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Locking Feature | SLOTTED |
| Screw Material | IRON ALLOY 660 |
| Internal Drive Style | CROSS RECESS TYPE III |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNJC |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| BACS12CK3-12 | 3-V Fastener Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| BACS12CK3-12 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-520-8704 is a Screw,machine, manufactured by 3-V Fastener Co., Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-520-8704 has 1 manufacturer part number on file: BACS12CK3-12 (3-V Fastener Co., Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-4615. Verify interchangeability with system specifications before substitution.
Key specifications for BACS12CK3-12: Head Height: 0.110 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN; Locking Feature Material Document and Classification: MIL-DTL-18240, TYPE P MIL SPEC SINGLE MATERIAL RESPONSE; Screw Surface Treatment: CADMIUM; Fastener Length: 0.250 INCHES NOMINAL IN. 18 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.