The Bolt,machine, cataloged under National Stock Number 5306-00-382-7571, 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 19 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-382-7571 |
| Primary Part Number | ST2018-028 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.060 INCHES MINIMUM IN |
| Head Height | 0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Fastener Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | PWA 37-1,FSCM 77445 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Thread Length | 0.740 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.025 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Width Between Flats | 0.312 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| ST2018-028 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| ST2018-028 | Acufast Aircraft Products (USA) |
| ST2018-028 | Rtx Corporation Div Pratt & Whitney (USA) |
| ST2018-028 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| ST2018-028 | Morton Grinding, Inc Dba Morton Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1495307 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-00-382-7571 is a Bolt,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-382-7571 has 5 manufacturer part numbers on file: ST2018-028 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), ST2018-028 (Acufast Aircraft Products), ST2018-028 (Rtx Corporation Div Pratt & Whitney), ST2018-028 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), ST2018-028 (Morton Grinding, Inc Dba Morton Manufacturing).
Key specifications for ST2018-028: Extended Washer Thickness: 0.060 INCHES MINIMUM IN; Head Height: 0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN; Fastener Length: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN; Surface Treatment Document and Classification: PWA 37-1,FSCM 77445 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 19 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.