The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-477-5821, 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 17 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-477-5821 |
| Primary Part Number | PBF1267-8-16 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Extended Washer Thickness | 0.072 INCHES NOMINAL IN |
| Head Height | 0.450 INCHES NOMINAL IN |
| Fastener Length | 1.767 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN |
| Thread Length | 0.767 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Criticality Code Justification | AGAV |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.000 INCHES NOMINAL IN |
| Head Minor Diameter | 0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Grip Diameter | 0.499 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.531 INCHES NOMINAL 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 | Y |
| Part Number | Manufacturer |
|---|---|
| ST3M753-8-16 | Houston Precision Fasteners I Lp (USA) |
| PBF1267-8-16 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1032-8-16 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| A1C763-8-16 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S343-8-16 PRIMARY | Huck International, Inc (USA) |
| 11829-8-16 | Reid Products Inc. Dba Reid Products Inc (USA) |
| SLB255-8-16 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3190-8-16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HP7753-8-16 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 122897-8-16 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB156-8-16 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M753-8-16 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VFK600-8-16 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M753-8-16 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 122897-8-16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-477-5821 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-477-5821 has 14 manufacturer part numbers on file: ST3M753-8-16 (Houston Precision Fasteners I Lp), PBF1267-8-16 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GS1032-8-16 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), A1C763-8-16 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), S343-8-16 (Huck International, Inc) and 9 more.
Key specifications for PBF1267-8-16: Extended Washer Thickness: 0.072 INCHES NOMINAL IN; Head Height: 0.450 INCHES NOMINAL IN; Fastener Length: 1.767 INCHES NOMINAL IN; Extended Washer Diameter: 0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN. 17 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.