The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-063-3787, 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 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-063-3787 |
| Primary Part Number | PBFMS21296-09028 |
| 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 GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.071 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN |
| Head Height | 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Fastener Length | 2.765 INCHES MINIMUM AND 2.795 INCHES MAXIMUM IN |
| Extended Washer Diameter | 1.037 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN |
| Thread Length | 1.005 INCHES MINIMUM AND 1.055 INCHES MAXIMUM IN |
| Hardness Rating | 51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Grip Diameter | 0.5605 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP H11 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 |
|---|---|
| PBFMS21296-09028 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MS21296-09028 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1497632 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS21296-09028 | 5/9 Secondary reference U.S. Government activity |
| MS21296-09028 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-063-3787 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-063-3787 has 2 manufacturer part numbers on file: PBFMS21296-09028 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MS21296-09028 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for PBFMS21296-09028: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.071 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN; Head Height: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM 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.