The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-308-4811, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-308-4811 |
| Primary Part Number | BACB30LU5-10 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.094 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-5000/4340 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049/8740 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.574 INCHES MINIMUM AND 0.637 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 |
|---|---|
| BACB30LU5-10 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LU5-10 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LU5-10 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LU5-10 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LU5-10 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LU5-10 PRIMARY | Federal Manufacturing Corp (USA) |
| BACB30LU5-10 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU5-10 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30LU5-10 | 5/9 Secondary reference U.S. Government activity |
| BACB30LU5-10 | 5/9 Secondary reference Voi-Shan/chatsworth Div of Vsi Corp Sub of Fairchild Industries Inc |
| BACB30LU5-10 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LU5-10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-308-4811 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-308-4811 has 7 manufacturer part numbers on file: BACB30LU5-10 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30LU5-10 (Sps Technologies, Llc Dba PB Fasteners), BACB30LU5-10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LU5-10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LU5-10 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 2 more.
Key specifications for BACB30LU5-10: Fastener Length: 1.094 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: MIL-S-5000/4340 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049/8740 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 16 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.