The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-462-2881, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-462-2881 |
| Primary Part Number | SLB748-4D14 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 0.556 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.316 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.566 INCHES NOMINAL IN |
| Head Minor Diameter | 0.448 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.448 INCHES MINIMUM AND 0.458 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 |
|---|---|
| 11823-4D14 | Reid Products Inc. Dba Reid Products Inc (USA) |
| SLB748-4D14 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3174-4D14 | Howmet Global Fastening Systems Inc (USA) |
| ST3M744-4D14 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M744-4D14 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1015-4D14 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC687-4D14 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-4D14 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 122895-4D14 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3174-4D14 PRIMARY | Huck International, Inc (USA) |
| PBF1265-4D14 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VCG0001-4D14 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M744-4D14 | Houston Precision Fasteners I Lp (USA) |
| WC744-4D14 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| S406-4D14 | 5/9 Secondary reference U.S. Government activity |
| VS3174-4D14 | 5/2 Secondary reference U.S. Government activity |
| 122895-4D14 | 5/2 Secondary reference U.S. Government activity |
| MB154-4D14 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5306-01-462-2881 is a Bolt,close Tolerance, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-462-2881 has 14 manufacturer part numbers on file: 11823-4D14 (Reid Products Inc. Dba Reid Products Inc), SLB748-4D14 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), VS3174-4D14 (Howmet Global Fastening Systems Inc), ST3M744-4D14 (The Boeing Company Div Defense), ST3M744-4D14 (Fastener Innovation Technology, Inc. Dba F I T) and 9 more.
Key specifications for SLB748-4D14: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 0.556 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.316 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.