The Bracket,double Angle, cataloged under National Stock Number 5340-01-498-0666, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-498-0666 |
| Primary Part Number | 12478972-4 |
| Item Name | Bracket,double Angle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Second Leg Distance From Edge to Hole Center Along Length | 0.500 INCHES NOMINAL IN |
| First Leg Distance From Edge to Hole Center Along Length | 0.313 INCHES NOMINAL IN |
| First Leg Hole Diameter | 0.374 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| First Leg Angle | 0.13 RADIANS NOMINAL |
| Center Section Thickness | 0.125 INCHES NOMINAL IN |
| First Leg Distance Between Hole Centers Along Width | 1.560 INCHES NOMINAL IN |
| Second Leg Relationship to First Leg | NOT IDENTICAL |
| Second Leg Angle | 0.13 RADIANS NOMINAL |
| Second Leg Hole Diameter | 0.195 INCHES MINIMUM AND 0.206 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD 1ST TREATMENT RESPONSE AND FED-STD-595 FED STD 2ND TREATMENT RESPONSE |
| Second Leg Width | 4.190 INCHES MINIMUM AND 4.310 INCHES MAXIMUM IN |
| Second Leg Length | 1.500 INCHES NOMINAL IN |
| First Leg Hole Arrangement Style | TWO HOLES |
| Second Leg Distance From Edge to Hole Center Along Width | 2.350 INCHES NOMINAL IN |
| Second Leg Chamfer Angle | 45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM |
| Center Section Width | 4.190 INCHES MINIMUM AND 4.310 INCHES MAXIMUM IN |
| Style Designator | ADJACENT ANGLES |
| First Leg Style | SQUARE |
| Material Document and Classification | ASTM B209M NATIONAL SPEC ALL MATERIAL RESPONSES |
| Second Leg Thickness | 0.125 INCHES NOMINAL IN |
| First Leg Distance From Edge to Hole Center Along Width | 1.940 INCHES NOMINAL IN |
| First Leg Thickness | 0.125 INCHES NOMINAL IN |
| First Leg Length | 0.910 INCHES NOMINAL IN |
| First Leg Width | 4.190 INCHES MINIMUM AND 4.310 INCHES MAXIMUM IN |
| Second Leg Style | CHAMFERED ENDS |
| Surface Treatment | CHROMATE AND PRIMER EPOXY AND PLASTIC POLYURETHANE |
| Second Leg End Width | 3.690 INCHES MINIMUM AND 3.810 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 6061 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 12478972-4 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12478972 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5340-01-498-0666 is a Bracket,double Angle, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-498-0666 has 1 manufacturer part number on file: 12478972-4 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12478972-4: Second Leg Distance From Edge to Hole Center Along Length: 0.500 INCHES NOMINAL IN; First Leg Distance From Edge to Hole Center Along Length: 0.313 INCHES NOMINAL IN; First Leg Hole Diameter: 0.374 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; First Leg Angle: 0.13 RADIANS NOMINAL. 28 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.