The Bolt,ribbed Neck, cataloged under National Stock Number 5306-01-224-6887, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-224-6887 |
| Primary Part Number | 12331242 |
| Item Name | Bolt,ribbed Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN |
| Rib Included Angle | 90.0 DEGREES NOMINAL |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 2.204 INCHES MINIMUM AND 2.343 INCHES MAXIMUM IN |
| Rib Length | 0.594 INCHES NOMINAL IN |
| Rib Minor Diameter | 0.298 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.340 INCHES NOMINAL IN |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Rib Quantity | 12 |
| Head Diameter | 0.688 INCHES MINIMUM AND 0.719 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 |
|---|---|
| 12331242 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5306-01-224-6887 is a Bolt,ribbed Neck, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-224-6887 has 1 manufacturer part number on file: 12331242 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12331242: Head Height: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN; Rib Included Angle: 90.0 DEGREES NOMINAL; Fastener Length: 3.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 18 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.