The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-658-6881, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Metrican Inc Dba Metrix Manufacturing Company. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-658-6881 |
| Primary Part Number | 509441-414 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Metrican Inc Dba Metrix Manufacturing Company |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES MINIMUM IN |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.75 INCHES NOMINAL IN |
| Special Test Features | MAGNETIC PARTICLE INSPECTION E1444 |
| Thread Length | 1.25 INCHES NOMINAL IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | SPCL AND CQFM AND CQBC |
| Material Document and Classification | AMS6382 ASSN STD ALL MATERIAL RESPONSES OR AMS6414 ASSN STD ALL MATERIAL RESPONSES AND AMS6415 ASSN STD ALL MATERIAL RESPONSES OR AMS6382 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRF |
| Head Diameter | 0.375 INCHES NOMINAL 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 |
|---|---|
| 509441-414 | Apollo Aerospace Components Llc (USA) |
| 509441-414 PRIMARY | Metrican Inc Dba Metrix Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| 509411 | 5/1 Secondary reference U.S. Government activity |
| 509441-414 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-658-6881 is a Bolt,internal Wrenching, manufactured by Metrican Inc Dba Metrix Manufacturing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-658-6881 has 2 manufacturer part numbers on file: 509441-414 (Apollo Aerospace Components Llc), 509441-414 (Metrican Inc Dba Metrix Manufacturing Company).
Key specifications for 509441-414: Width Across Flats: 0.188 INCHES MINIMUM IN; Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.75 INCHES NOMINAL IN; Special Test Features: MAGNETIC PARTICLE INSPECTION E1444. 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.