The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-216-7885, 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. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-216-7885 |
| Primary Part Number | 81439-6-2 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Head Height | 0.710 INCHES NOMINAL IN |
| Fastener Length | 2.004 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | BAC 5424 CLASS A FSCM 77272 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.617 INCHES NOMINAL IN |
| Hole Configuration Style | ROUND |
| Material Document and Classification | AMS 6414 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.373 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.004 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.980 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4340 OVERALL |
| Hole Quantity | 2 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.106 INCHES NOMINAL IN |
| Head Diameter | 0.545 INCHES MINIMUM AND 0.546 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 |
|---|---|
| 81439-6-2 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| A02RS373-2 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| A02RS373-4 | C/1 Advisory reference — outside the item-of-supply concept The Boeing Company |
| 92284-6-2 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
NSN 5306-01-216-7885 is a Bolt,internal Wrenching, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-216-7885 has 2 manufacturer part numbers on file: 81439-6-2 (Sps Technologies, Llc Dba PB Fasteners), A02RS373-2 (The Boeing Company).
Key specifications for 81439-6-2: Width Across Flats: 0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN; Head Height: 0.710 INCHES NOMINAL IN; Fastener Length: 2.004 INCHES NOMINAL IN; Surface Treatment Document and Classification: BAC 5424 CLASS A FSCM 77272 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 23 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.