The Screw,machine, cataloged under National Stock Number 5305-01-285-7712, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-285-7712 |
| Primary Part Number | 91770A542 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Thread Length | 0.900 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | TRUSS |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303 PLUS X OR STEEL COMP 303SE OR STEEL COMP 303CU OR STEEL COMP 303MA OR STEEL COMP 304 OR STEEL COMP 304L |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.546 INCHES MINIMUM AND 0.573 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 |
|---|---|
| AESG9C250A00SB8A31 | The American Society of Mechanical Engineers (USA) |
| 91770A542 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 82-2076-0100 | C/1 Advisory reference — outside the item-of-supply concept Pierce Manufacturing Inc |
NSN 5305-01-285-7712 is a Screw,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-285-7712 has 2 manufacturer part numbers on file: AESG9C250A00SB8A31 (The American Society of Mechanical Engineers), 91770A542 (Mcmaster-Carr Supply Co).
Key specifications for 91770A542: Head Height: 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES NOMINAL IN; Thread Length: 0.900 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 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.