The Bolt,shoulder, cataloged under National Stock Number 5306-00-522-1486, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-522-1486 |
| Primary Part Number | 276351 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Head Height | 0.272 INCHES MINIMUM AND 0.292 INCHES MAXIMUM IN |
| Fastener Length | 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM IN |
| Shoulder Length | 0.150 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Length | 0.175 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.465 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.311 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.312 INCHES NOMINAL SECOND SHOULDER IN |
| Thread Length | 1.658 INCHES MINIMUM AND 1.708 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Supplementary Features | FAILURE COULD CAUSE CATASTROPHIC OR CRITICAL FAILURE RESULTING IN THE LOSS OF OR SERIOUS DAMAGE TO THE AIRCRAFT. WPN SYS OR UNCOMMANDED ENGINE SHUTDOWN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | SUPP |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.300 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.070 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 276351 | Rtx Corporation Div Pratt & Whitney (USA) |
| 276351 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 276351 | Necchi Spa (ITA) |
| Reference | Meaning |
|---|---|
| 276351 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 276351 | 5/9 Secondary reference U.S. Government activity |
| 276351 | 5/9 Secondary reference U.S. Government activity |
| 276351 | 5/9 Secondary reference Mnr Tool Engineering Inc |
NSN 5306-00-522-1486 is a Bolt,shoulder, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-522-1486 has 3 manufacturer part numbers on file: 276351 (Rtx Corporation Div Pratt & Whitney), 276351 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 276351 (Necchi Spa).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-314-6554. Verify interchangeability with system specifications before substitution.
Key specifications for 276351: Extended Washer Thickness: 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Head Height: 0.272 INCHES MINIMUM AND 0.292 INCHES MAXIMUM IN; Fastener Length: 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM IN; Shoulder Length: 0.150 INCHES NOMINAL SECOND SHOULDER IN. 28 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.