The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-612-0688, 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 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-612-0688 |
| Primary Part Number | 20-101-08-29 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 2.730 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 OR AMS2700,METHOD 1,CL 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.638 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5662 OR AMS5663 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | AMS5678 ASSN STD SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Features Provided | SEALING RING |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.859 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 25100 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY 718 FASTENER |
| Material | STEEL CORROSION RESISTING LOCKING FEATURE |
| 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 |
|---|---|
| 20-101-08-29 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 125634-08-29 | 7/2 Vendor item drawing reference Sps Technologies, Llc Dba PB Fasteners |
| 20-101-08-29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-612-0688 is a Bolt,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-612-0688 has 1 manufacturer part number on file: 20-101-08-29 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 20-101-08-29: Head Height: 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Fastener Length: 2.730 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS-QQ-P-35 OR AMS2700,METHOD 1,CL 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.638 INCHES NOMINAL IN. 21 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.