The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-477-5788, 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 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-477-5788 |
| Primary Part Number | GS1015-7D21 |
| 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 | 0.257 INCHES MINIMUM IN |
| Fastener Length | 1.756 INCHES MINIMUM AND 1.776 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.453 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.313 INCHES NOMINAL IN |
| Head Minor Diameter | 0.711 INCHES MINIMUM AND 0.717 INCHES MAXIMUM IN |
| Grip Diameter | 0.671 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| 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 | 1.631 INCHES MINIMUM AND 1.641 INCHES MAXIMUM 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 | X |
| Part Number | Manufacturer |
|---|---|
| GS1015-7D21 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 122895-7D21 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M744-7D21 | Houston Precision Fasteners I Lp (USA) |
| ST3M744-7D21 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| AIC687-7D21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3174-7D21 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| WC744-7D21 | West Coast Aerospace, Inc. (USA) |
| SLB748-7D21 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| PBF1265-7D21 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-7D21 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| VS3174-7D21 PRIMARY | Huck International, Inc (USA) |
| 11823-7D21 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M744-7D21 | The Boeing Company Div Defense (USA) |
| VCG0001-7D21 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| 122895-7D21 | 3/2 Design control — primary reference U.S. Government activity |
| VS3174-7D21 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-477-5788 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 5306-01-477-5788 has 14 manufacturer part numbers on file: GS1015-7D21 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 122895-7D21 (Sps Technologies, Llc Dba PB Fasteners), ST3M744-7D21 (Houston Precision Fasteners I Lp), ST3M744-7D21 (Fastener Innovation Technology, Inc. Dba F I T), AIC687-7D21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 9 more.
Key specifications for GS1015-7D21: Head Height: 0.257 INCHES MINIMUM IN; Fastener Length: 1.756 INCHES MINIMUM AND 1.776 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.453 INCHES NOMINAL 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.