The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-433-3591, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Simmonds Precision Products Inc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-433-3591 |
| Primary Part Number | S4427 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Simmonds Precision Products Inc |
| Status | ACTIVE |
| Width Across Flats | 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNFUNFUNF |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HANDRIGHT-HANDRIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES0.312 INCHES0.312 INCHES IN |
| Nut Height | 0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALLPASSIVATE OVERALL |
| Countersink Angle | 110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT |
| Nut Style | HEXAGONHEXAGONHEXAGON |
| Thread Class | 3B3B3B |
| Thread Quantity Per Inch | 242424 |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 385 OR STEEL COMP 309 OR STEEL COMP 403 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 416 OR STEEL COMP 416SE OR STEEL COMP 420 OR STEEL COMP 430 OR STEEL COMP 430F OR STEEL COMP 431 OR STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OR STEEL COMP 446 OVERALL A |
| Bearing Surface Type | CHAMFEREDCHAMFEREDCHAMFERED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-433-3591 is a Nut,plain,hexagon, manufactured by Simmonds Precision Products Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-433-3591 has 2 manufacturer part numbers on file: S4427 (Simmonds Precision Products Inc), S4427 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for S4427: Width Across Flats: 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNFUNFUNF; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL66 FED STD ALL MATERIAL RESPONSES OVERALL. 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.