The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-00-022-8085, 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 27 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-022-8085 |
| Primary Part Number | 494927 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.010 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN |
| Head Height | 0.115 INCHES NOMINAL IN |
| Rib Included Angle | 45.0 DEGREES NOMINAL |
| Fastener Length | 1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN |
| Shoulder Length | 0.060 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Length | 0.340 INCHES NOMINAL SECOND SHOULDER IN |
| Extended Washer Diameter | 0.450 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Distance From Largest Diameter of Bearing Surface of Head to Ribs | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.279 INCHES MINIMUM AND 0.281 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.285 INCHES MINIMUM AND 0.295 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shoulder Shape | RIBBED SECOND SHOULDER |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Rib Length | 0.340 INCHES NOMINAL IN |
| Rib Minor Diameter | 0.260 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.279 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Rib Quantity | 35 |
| Head Diameter | 0.880 INCHES MINIMUM AND 0.900 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 |
|---|---|
| 494927 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 494927 | Kito Mfg Co. Ltd (JPN) |
| Reference | Meaning |
|---|---|
| 494927 | 5/9 Secondary reference Kito Mfg Co. Ltd |
| 494927 | 5/9 Secondary reference Pro/des Inc Products Design Div |
| 494927 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 494927 | 5/2 Secondary reference U.S. Government activity |
| 494927 | 5/9 Secondary reference Accurate Threaded Products Company the |
NSN 5306-00-022-8085 is a Bolt,ribbed Shoulder, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-022-8085 has 2 manufacturer part numbers on file: 494927 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 494927 (Kito Mfg Co. Ltd).
Key specifications for 494927: Extended Washer Thickness: 0.010 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN; Head Height: 0.115 INCHES NOMINAL IN; Rib Included Angle: 45.0 DEGREES NOMINAL; Fastener Length: 1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN. 27 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.