The Bolt,shear, cataloged under National Stock Number 5306-01-581-4939, 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 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-581-4939 |
| Primary Part Number | BACB30MR4K9 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.225 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN |
| Fastener Length | 1.207 INCHES MINIMUM AND 1.237 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85, TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Grip Diameter | 0.2481 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 200000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY 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 |
|---|---|
| BACB30MR4K9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30MR4K9 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30MR4K9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30MR4K9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-581-4939 is a Bolt,shear, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-581-4939 has 3 manufacturer part numbers on file: BACB30MR4K9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30MR4K9 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30MR4K9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for BACB30MR4K9: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.225 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN. 20 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.