The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-478-2440, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-478-2440 |
| Primary Part Number | PBF1682-4-12C |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.1430 INCHES MINIMUM AND 1.1630 INCHES MAXIMUM IN |
| Thread Length | 0.403 INCHES NOMINAL IN |
| Material Document and Classification | AMS5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.173 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 3490 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORX |
| Countersink Angle | 129.0 DEGREES MINIMUM AND 131.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.485 INCHES MINIMUM AND 0.495 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 |
|---|---|
| PBF1682-4-12C PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 03A512-4-12C | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| 03A512 | D/9 Drawing number reference only Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 5306-01-478-2440 is a Bolt,internal Wrenching, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-478-2440 has 2 manufacturer part numbers on file: PBF1682-4-12C (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 03A512-4-12C (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
2 possible matches (shared part number, not a government interchangeability claim): 5306-01-478-2443, 5306-01-478-2451. Verify interchangeability with system specifications before substitution.
Key specifications for PBF1682-4-12C: Fastener Length: 1.1430 INCHES MINIMUM AND 1.1630 INCHES MAXIMUM IN; Thread Length: 0.403 INCHES NOMINAL IN; Material Document and Classification: AMS5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Spline Major Diameter: 0.173 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN. 15 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.