The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-489-1333, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-489-1333 |
| Primary Part Number | S6137-64369-2 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 1.251 INCHES MINIMUM AND 1.281 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 OR TY 3 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.541 INCHES MINIMUM AND 0.581 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.700 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| S6137-64369-2 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5306-00-489-1333 is a Bolt,close Tolerance, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-489-1333 has 1 manufacturer part number on file: S6137-64369-2 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6137-64369-2: Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 1.251 INCHES MINIMUM AND 1.281 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 2 OR TY 3 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 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.