The Setscrew, cataloged under National Stock Number 5305-01-640-9268, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-640-9268 |
| Primary Part Number | 12577736-1 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Point Diameter | 0.270 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Fastener Length | 2.120 INCHES MINIMUM AND 2.180 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633,TY II,SC 2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 2.100 INCHES NOMINAL IN |
| Supplementary Features | REFER TO DRAWING FOR ADDITIONAL REQUIREMENTS |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM FASTENER |
| Material Document and Classification | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | MIL-DTL-18240 MIL STD SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Surface Treatment | ZINC FASTENER |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | PLASTIC NYLON LOCKING FEATURE |
| Material | STEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL COMP 4340 OR STEEL COMP 8630 OR STEEL COMP 8635 OR STEEL COMP 8637 OR STEEL COMP 8640 OR STEEL COMP 8642 OR STEEL COMP 8645 FASTENER |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 12577736-1 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12577736 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5305-01-640-9268 is a Setscrew, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-640-9268 has 1 manufacturer part number on file: 12577736-1 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12577736-1: Point Diameter: 0.270 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Width Across Flats: 0.250 INCHES NOMINAL IN; Fastener Length: 2.120 INCHES MINIMUM AND 2.180 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633,TY II,SC 2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE FASTENER. 20 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.