The Bolt,u, cataloged under National Stock Number 5306-01-124-1226, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Barnes Group Inc. Dba Barnes Distribution. Government technical data includes 9 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-124-1226 |
| Primary Part Number | 32557 |
| Item Name | Bolt,u |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Barnes Group Inc. Dba Barnes Distribution |
| Status | ACTIVE |
| Inside Distance Between Shanks | 3.000 INCHES NOMINAL IN |
| Style Designator | ROUND BEND |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 32557 PRIMARY | Barnes Group Inc. Dba Barnes Distribution (USA) |
NSN 5306-01-124-1226 is a Bolt,u, manufactured by Barnes Group Inc. Dba Barnes Distribution, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-124-1226 has 1 manufacturer part number on file: 32557 (Barnes Group Inc. Dba Barnes Distribution).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-260-3039. Verify interchangeability with system specifications before substitution.
Key specifications for 32557: Inside Distance Between Shanks: 3.000 INCHES NOMINAL IN; Style Designator: ROUND BEND; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.312 INCHES IN. 9 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.