The Bolt,square Neck, cataloged under National Stock Number 5306-01-633-8071, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-633-8071 |
| Primary Part Number | 74419 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Neck Length | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Head Height | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Fastener Length | 0.720 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN |
| Thread Length | 0.605 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN |
| Neck Width | 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 302 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 |
|---|---|
| 74419 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| BLT-0038SS | Bauer Compressors, Inc. (USA) |
NSN 5306-01-633-8071 is a Bolt,square Neck, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-633-8071 has 2 manufacturer part numbers on file: 74419 (Fastenal Company Dba Fastenal Co), BLT-0038SS (Bauer Compressors, Inc.).
Key specifications for 74419: Neck Length: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN; Head Height: 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; Fastener Length: 0.720 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN; Thread Length: 0.605 INCHES NOMINAL 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.