The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-166-1701, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-166-1701 |
| Primary Part Number | LD111-0026-0412 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.132 INCHES MINIMUM AND 1.162 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.397 INCHES NOMINAL IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.750 INCHES NOMINAL IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 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 |
| Part Number | Manufacturer |
|---|---|
| LD111-0026-0412 | Hi-Shear Corporation (USA) |
| LD111-0026-0412 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| LD111-0026-0412 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| LD111-0026-0412 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| LD111-0026-0412 | Huck International, Inc (USA) |
| LD111-0026-0412 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| LD111-0026-0412 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| LD111-0026-0412 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| LD111-0026-0412 | Abounding Security Inc Div of Maa Corp (USA) |
| Reference | Meaning |
|---|---|
| LD111-0026-0412 | 5/2 Secondary reference U.S. Government activity |
| LD111-0026-0412 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-166-1701 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-166-1701 has 9 manufacturer part numbers on file: LD111-0026-0412 (Hi-Shear Corporation), LD111-0026-0412 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), LD111-0026-0412 (The Boeing Company Div Legacy Am&m), LD111-0026-0412 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), LD111-0026-0412 (Huck International, Inc) and 4 more.
Key specifications for LD111-0026-0412: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.132 INCHES MINIMUM AND 1.162 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.397 INCHES NOMINAL IN. 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.