The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-369-5679, 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 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-369-5679 |
| Primary Part Number | 4031720 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN |
| Thread Length | 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Hardness Rating | 241.0 BRINELL STANDARD MAXIMUM OVERALL |
| Material Document and Classification | AMS 5758 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2480 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 260000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 210000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL 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 | X |
NSN 5306-00-369-5679 is a Bolt,close Tolerance, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-369-5679 has 3 manufacturer part numbers on file: 4031720 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4031720 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 4041720 (Acufast Aircraft Products).
Key specifications for 4031720: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN; Thread Length: 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN; Hardness Rating: 241.0 BRINELL STANDARD MAXIMUM 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.