The Screw,machine, cataloged under National Stock Number 5305-00-367-5311, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Zenith Fuel Systems Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-367-5311 |
| Primary Part Number | C140-12 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Zenith Fuel Systems Llc |
| Status | ACTIVE |
| Head Height | 0.078 INCHES NOMINAL IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Screw Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.250 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | BINDING |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 1212 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.281 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 |
|---|---|
| C140-12 PRIMARY | Zenith Fuel Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| C140-4 | 5/9 Secondary reference Zenith Fuel Systems Llc |
NSN 5305-00-367-5311 is a Screw,machine, manufactured by Zenith Fuel Systems Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-367-5311 has 1 manufacturer part number on file: C140-12 (Zenith Fuel Systems Llc).
4 possible matches (shared part number, not a government interchangeability claim): 2320-00-926-0949, 2320-00-926-0950, 2320-00-926-0953. Verify interchangeability with system specifications before substitution.
Key specifications for C140-12: Head Height: 0.078 INCHES NOMINAL IN; Fastener Length: 0.250 INCHES NOMINAL IN; Screw Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE; Thread Length: 0.250 INCHES MINIMUM IN. 13 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.