The Bolt,ribbed Neck, cataloged under National Stock Number 5306-01-501-1941, 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. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-501-1941 |
| Primary Part Number | BACB30LE4K2 |
| Item Name | Bolt,ribbed Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Extended Washer Thickness | 0.042 INCHES NOMINAL IN |
| Head Height | 0.235 INCHES NOMINAL IN |
| Rib Included Angle | 30.0 DEGREES NOMINAL |
| Fastener Length | 0.860 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE 2, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.470 INCHES NOMINAL IN |
| Thread Length | 0.455 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Rib Length | 0.090 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Rib Quantity | 12 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| BACB30LE4K2 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LE4K2 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LE4K2 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACB30LE4K2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-501-1941 is a Bolt,ribbed Neck, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-501-1941 has 3 manufacturer part numbers on file: BACB30LE4K2 (Sps Technologies, Llc Dba PB Fasteners), BACB30LE4K2 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LE4K2 (Howmet Global Fastening Systems Inc Div City of Industry Operations).
Key specifications for BACB30LE4K2: Extended Washer Thickness: 0.042 INCHES NOMINAL IN; Head Height: 0.235 INCHES NOMINAL IN; Rib Included Angle: 30.0 DEGREES NOMINAL; Fastener Length: 0.860 INCHES NOMINAL IN. 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.