The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-512-6439, 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 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-512-6439 |
| Primary Part Number | S4928913-4-14 |
| Item Name | Bolt,close Tolerance |
| 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 | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Surface Finish | 32.0 MICROINCHES FIRST SHOULDER |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 1.166 INCHES MINIMUM AND 1.196 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | DPS.9.74,TY 1,CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE SIDES OF HEAD |
| Surface Treatment Document and Classification | DPS.9.74,TY 1,CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE THREADS |
| Surface Treatment Document and Classification | DPS.9.74,TY 1,CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE TOP OF HEAD |
| Surface Treatment Document and Classification | DPS.9.84,TY 1,CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| Surface Treatment Document and Classification | DPS.9.84,TY 1,CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE GRIP |
| Thread Length | 0.316 INCHES NOMINAL IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM THREADS |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CHROMIUM BEARING SURFACE OF HEAD |
| Surface Treatment | CADMIUM TOP OF HEAD |
| Surface Treatment | CADMIUM SIDES OF HEAD |
| Minimum Tensile Strength | 95000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| 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 |
|---|---|
| S4928913-4-14 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S4928913-4-14 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| S4928913-4-14 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| S4928913-4-14 | 5/2 Secondary reference U.S. Government activity |
| S4928913-4-14 | 5/9 Secondary reference Mercury Aerospace Fasteners Inc |
NSN 5306-01-512-6439 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-512-6439 has 3 manufacturer part numbers on file: S4928913-4-14 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), S4928913-4-14 (Howmet Global Fastening Systems Inc), S4928913-4-14 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for S4928913-4-14: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Surface Finish: 32.0 MICROINCHES FIRST SHOULDER. 28 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.