The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-505-4053, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-505-4053 |
| Primary Part Number | GS1031-6-25 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace |
| Status | ACTIVE |
| Head Height | 0.210 INCHES NOMINAL IN |
| Fastener Length | 2.063 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.516 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.553 INCHES MINIMUM AND 1.573 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.668 INCHES MINIMUM AND 0.679 INCHES MAXIMUM IN |
| Grip Diameter | 0.546 INCHES MINIMUM AND 0.574 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 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 | Y |
| Part Number | Manufacturer |
|---|---|
| HP7747-6-25 | Heartland Precision Fasteners Inc (USA) |
| 122896-6-25 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-6-25 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VCG0002-6-25 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC688-6-25 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1031-6-25 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| SLB254-6-25 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| MB155-6-25 | Hi-Shear Corporation (USA) |
| MB155-6-25 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1266-6-25 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S397-6-25 | Huck International, Inc (USA) |
| ST3M747-6-25 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M747-6-25 | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| 122896-6-25 | 5/9 Secondary reference Sps Technologies Inc |
| 122896-6-25 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-505-4053 is a Bolt,close Tolerance, manufactured by B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-505-4053 has 13 manufacturer part numbers on file: HP7747-6-25 (Heartland Precision Fasteners Inc), 122896-6-25 (Sps Technologies, Llc Dba PB Fasteners), ST3M747-6-25 (Fastener Innovation Technology, Inc. Dba F I T), VCG0002-6-25 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), AIC688-6-25 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 8 more.
Key specifications for GS1031-6-25: Head Height: 0.210 INCHES NOMINAL IN; Fastener Length: 2.063 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.516 INCHES NOMINAL IN. 18 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.