The Bolt,shoulder, cataloged under National Stock Number 5306-01-204-4185, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-204-4185 |
| Primary Part Number | BACB30PU5D6 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Head Height | 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN |
| Fastener Length | 0.545 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN |
| Shoulder Length | 0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.390 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.354 INCHES MINIMUM AND 0.404 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| BACB30PU5D6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30PU5D6 | Federal Manufacturing Corp (USA) |
| BACB30PU5D6 | Howmet Global Fastening Systems Inc (USA) |
| BACB30PU5D6 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30PU5D6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30PU5D6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30PU5D6 | 5/9 Secondary reference U.S. Government activity |
| BACB30PU5D6 | 5/9 Secondary reference U.S. Government activity |
| BACB30PU5D6 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30PU5D6 | 5/2 Secondary reference U.S. Government activity |
| BACB30PU5D6 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30PU5D6 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-204-4185 is a Bolt,shoulder, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-204-4185 has 6 manufacturer part numbers on file: BACB30PU5D6 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30PU5D6 (Federal Manufacturing Corp), BACB30PU5D6 (Howmet Global Fastening Systems Inc), BACB30PU5D6 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30PU5D6 (Sps Technologies, Llc Dba PB Fasteners) and 1 more.
Key specifications for BACB30PU5D6: Head Height: 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN; Fastener Length: 0.545 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN; Shoulder Length: 0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.