The Screw,machine, cataloged under National Stock Number 5305-01-133-0149, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Brunson Instrument Company Dba Brunson Instrument Company. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-0149 |
| Primary Part Number | OC-4-271 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Brunson Instrument Company Dba Brunson Instrument Company |
| Status | ACTIVE |
| Fastener Length | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Thread Length | 0.068 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY |
| Internal Drive Style | SLOT |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 48 |
| Thread Series Designator | UNF |
| Head Diameter | 0.172 INCHES MINIMUM AND 0.204 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 |
| Part Number | Manufacturer |
|---|---|
| OC-4-271 PRIMARY | Brunson Instrument Company Dba Brunson Instrument Company (USA) |
| Reference | Meaning |
|---|---|
| 0C-4-271 | C/1 Advisory reference — outside the item-of-supply concept Keuffel and Esser Co |
NSN 5305-01-133-0149 is a Screw,machine, manufactured by Brunson Instrument Company Dba Brunson Instrument Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-0149 has 1 manufacturer part number on file: OC-4-271 (Brunson Instrument Company Dba Brunson Instrument Company).
Key specifications for OC-4-271: Fastener Length: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN; Thread Length: 0.068 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.112 INCHES IN; Head Style: OVAL COUNTERSUNK. 12 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.