The Screw Assembly,panel, cataloged under National Stock Number 5305-01-439-3247, 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 27 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-439-3247 |
| Primary Part Number | 12421366 |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 5.30 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 85.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE RING |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE STAND-OFF |
| Material Accommodated Thickness | 3.0 MILLIMETERS NOMINAL MM |
| Thread Length | 38.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM STAND-OFF |
| Material Document and Classification | ASTM A228 ASSN STD SINGLE MATERIAL RESPONSE RING |
| Material Document and Classification | ASTM A304 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE STAND-OFF |
| Material Document and Classification | ASTM F568 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 1.25 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 13.0 MILLIMETERS NOMINAL MM |
| Color | OLIVE DRAB FASTENER |
| Color | OLIVE DRAB RING |
| Color | OLIVE DRAB STAND-OFF |
| Surface Treatment | ZINC AND CHROMATE FASTENER |
| Surface Treatment | ZINC AND CHROMATE RING |
| Surface Treatment | ZINC AND CHROMATE STAND-OFF |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Material | STEEL RING |
| Material | STEEL FASTENER |
| Material | STEEL COMP 4140H OR STEEL COMP 8740 STAND-OFF |
| Thread Series Designator | M |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-01-439-3247 is a Screw Assembly,panel, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-439-3247 has 3 manufacturer part numbers on file: 12421366 (U S Army Tank Automotive Command Amsta-Im-Mm), 12421366 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12421366 (Amz Alabama Inc.).
Key specifications for 12421366: Head Height: 5.30 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 85.0 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE FASTENER. 27 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.