The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-269-2858, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-269-2858 |
| Primary Part Number | 494111 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 2.600 INCHES MINIMUM AND 2.660 INCHES MAXIMUM IN |
| Head Height | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Fastener Length | 2.940 INCHES MINIMUM AND 2.960 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.300 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.710 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.090 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.190 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| Fifth Diameter From Head | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 5 |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 2.250 INCHES MINIMUM AND 2.290 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| 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 | F |
NSN 5306-00-269-2858 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-269-2858 has 2 manufacturer part numbers on file: 494111 (Rtx Corporation Div Pratt & Whitney), 494111 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 494111: Fourth Diameter From Head: 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 2.600 INCHES MINIMUM AND 2.660 INCHES MAXIMUM IN; Head Height: 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN; Fastener Length: 2.940 INCHES MINIMUM AND 2.960 INCHES MAXIMUM IN. 26 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.