The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-133-1570, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 17 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-133-1570 |
| Primary Part Number | AIC687-8D21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.281 INCHES NOMINAL IN |
| Fastener Length | 1.755 INCHES MINIMUM AND 1.775 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Thread Length | 0.433 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN |
| Width Between Flats | 0.774 INCHES MINIMUM AND 0.782 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | 1.630 INCHES MINIMUM AND 1.660 INCHES MAXIMUM ALL HOLES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| AIC687-8D21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11823-8D21 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| VS3174-8D21 PRIMARY | Huck International, Inc (USA) |
| WC744-8D21 PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M744-8D21 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-8D21 PRIMARY | Houston Precision Fasteners I Lp (USA) |
| VCG0001-8D21 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| PBF1265-8D21 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VS3174-8D21 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GS1015-8D21 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| SLB748-8D21 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 122895-8D21 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M744-8D21 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| 10115910 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M744-8D21 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| S406-8D21 | 5/9 Secondary reference U.S. Government activity |
| S406-8D21 | 5/9 Secondary reference Huck International, Inc |
| 122895-8D21 | 3/2 Design control — primary reference U.S. Government activity |
| VS3174-8D21 | 5/9 Secondary reference U.S. Government activity |
| MB154-8D21 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| MB154-8D21 | 5/9 Secondary reference Hi-Shear Corporation |
| 122895-8D21 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-133-1570 is a Bolt,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-133-1570 has 13 manufacturer part numbers on file: AIC687-8D21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 11823-8D21 (Reid Products Inc. Dba Reid Products Inc), VS3174-8D21 (Huck International, Inc), WC744-8D21 (West Coast Aerospace, Inc.), ST3M744-8D21 (Fastener Innovation Technology, Inc. Dba F I T) and 8 more.
Key specifications for AIC687-8D21: Head Height: 0.281 INCHES NOMINAL IN; Fastener Length: 1.755 INCHES MINIMUM AND 1.775 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL; Thread Length: 0.433 INCHES MINIMUM AND 0.473 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.