The Screw,close Tolerance, cataloged under National Stock Number 5305-00-601-8271, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-601-8271 |
| Primary Part Number | 3MA583-6T |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES TOP OF HEAD |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 125.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 0.765 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE AND PS 13421 FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND PAINT OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.3765 INCHES MINIMUM AND 0.3813 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 |
|---|---|
| 3MA583-6T | Huck International, Inc (USA) |
| 3MA583-6T | Hi-Shear Corporation (USA) |
| 3MA583-6T | Standard Aero Parts, Inc (USA) |
| 3MA583-6T | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3MA583-6T PRIMARY | The Boeing Company Div Defense (USA) |
| 3MA583-6T PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 3MA583-6T | 5/2 Secondary reference U.S. Government activity |
| 3MA583-6T | 5/2 Secondary reference U.S. Government activity |
| 3MFR583-6T | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5305-00-601-8271 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-601-8271 has 6 manufacturer part numbers on file: 3MA583-6T (Huck International, Inc), 3MA583-6T (Hi-Shear Corporation), 3MA583-6T (Standard Aero Parts, Inc), 3MA583-6T (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3MA583-6T (The Boeing Company Div Defense) and 1 more.
Key specifications for 3MA583-6T: Surface Finish: 32.0 MICROINCHES TOP OF HEAD; Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 125.0 MICROINCHES BEARING SURFACE OF HEAD. 22 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.