The Bolt,square Neck, cataloged under National Stock Number 5306-01-038-4762, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Komatsu America Corp.. Government technical data includes 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-038-4762 |
| Primary Part Number | 321351R1 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Fastener Length | 3.250 INCHES NOMINAL3.250 INCHES NOMINAL IN |
| Thread Length | 2.000 INCHES MINIMUM2.000 INCHES MINIMUM IN |
| Material Document and Classification | SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.000 INCHES1.000 INCHES IN |
| Head Style | FLAT COUNTERSUNKFLAT COUNTERSUNK |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Neck Width | 1.000 INCHES MINIMUM AND 1.000 INCHES MINIMUM AND 1.031 INCHES MAXIMUM1.031 INCHES MAXIMUM IN |
| Countersink Angle | 81.0 DEGREES NOMINAL81.0 DEGREES NOMINAL |
| Thread Class | 2A2A |
| Thread Quantity Per Inch | 88 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.594 INCHES MINIMUM AND 1.594 INCHES MINIMUM AND 1.700 INCHES MAXIMUM1.700 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 |
|---|---|
| 321351R1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 321351 R1 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 321351R1 | 5/9 Secondary reference U.S. Government activity |
| 321351R1 | 3/9 Design control — primary reference Komatsu American Intl Co |
| 321351R1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
NSN 5306-01-038-4762 is a Bolt,square Neck, manufactured by Komatsu America Corp., classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-038-4762 has 1 manufacturer part number on file: 321351R1 (Komatsu America Corp.).
Key specifications for 321351R1: Fastener Length: 3.250 INCHES NOMINAL3.250 INCHES NOMINAL IN; Thread Length: 2.000 INCHES MINIMUM2.000 INCHES MINIMUM IN; Material Document and Classification: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 1.000 INCHES1.000 INCHES IN. 13 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.