The Bolt,shoulder, cataloged under National Stock Number 5306-00-550-2580, 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 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-550-2580 |
| Primary Part Number | 270821 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Head Height | 0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Fastener Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Shoulder Length | 0.131 INCHES MINIMUM AND 0.135 INCHES MAXIMUM FIRST SHOULDER IN |
| Extended Washer Diameter | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.370 INCHES MINIMUM AND 0.390 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.605 INCHES MINIMUM AND 0.629 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 270821 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5306-00-550-2580 is a Bolt,shoulder, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-550-2580 has 1 manufacturer part number on file: 270821 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 270821: Extended Washer Thickness: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Head Height: 0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Fastener Length: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Shoulder Length: 0.131 INCHES MINIMUM AND 0.135 INCHES MAXIMUM FIRST SHOULDER IN. 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.