The Screw,drive, cataloged under National Stock Number 5305-01-512-8709, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-512-8709 |
| Primary Part Number | S640NG88TAB10307BNCG1 |
| Item Name | Screw,drive |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.212 INCHES IN |
| Head Height | 0.139 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633, TYPE II, SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Nonmachine Thread Style | DRIVE SCREW (TYPE U) |
| Material Document and Classification | ASTM A307 GRADE B ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | ROUND |
| Pilot Diameter | 0.173 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN |
| Pilot Length | 0.062 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Head Diameter | 0.382 INCHES MINIMUM AND 0.408 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 |
|---|---|
| S640NG88TAB10307BNCG1 | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| S640NG88TAB10307BNCG1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-512-8709 is a Screw,drive, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-512-8709 has 1 manufacturer part number on file: S640NG88TAB10307BNCG1 (The American Society of Mechanical Engineers).
Key specifications for S640NG88TAB10307BNCG1: Nonmachine Nominal Thread Diameter: 0.212 INCHES IN; Head Height: 0.139 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN; Fastener Length: 0.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633, TYPE II, SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 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.