The Bolt,square Neck, cataloged under National Stock Number 5306-00-949-4068, 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 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-949-4068 |
| Primary Part Number | 490196 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Neck Length | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Head Height | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Fastener Length | 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Thread Length | 0.410 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.276 INCHES MINIMUM AND 0.278 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.530 INCHES MINIMUM AND 0.550 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 |
|---|---|
| 490196 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 490196 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 490196 | 5/2 Secondary reference U.S. Government activity |
| 490196 | 5/9 Secondary reference Valco Co Government Sales Office |
NSN 5306-00-949-4068 is a Bolt,square Neck, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-949-4068 has 1 manufacturer part number on file: 490196 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 490196: Neck Length: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Head Height: 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; Fastener Length: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Thread Length: 0.410 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN. 14 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.