The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-476-6938, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-476-6938 |
| Primary Part Number | HP7753L4-9F |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.036 INCHES NOMINAL IN |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.030 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.470 INCHES NOMINAL IN |
| Thread Length | 0.468 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.062 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.562 INCHES NOMINAL IN |
| Head Minor Diameter | 0.312 INCHES NOMINAL IN |
| Grip Diameter | 0.248 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING 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 | X |
| Part Number | Manufacturer |
|---|---|
| HP7753L4-9F PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 122897L4-9F PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M753L4-9F | Saturn Fasteners Inc (USA) |
| 11829L4-9F | Reid Products Inc. Dba Reid Products Inc (USA) |
| SLB255-L4-9F PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3190L4-9F PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| VFK600L4-9F PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M753L4-9F PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| PBF1267L4-9F PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M753L4-9F PRIMARY | Houston Precision Fasteners I Lp (USA) |
| GS1032-L4-9F PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB156L4-9F PRIMARY | Hi-Shear Corporation (USA) |
| S343L4-9F PRIMARY | Huck International, Inc (USA) |
| AIC763L4-9F PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| ST3M753L4-9F | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| MB156L4-9F | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| VS3190L4-9F | 5/9 Secondary reference U.S. Government activity |
| S343L4-9F | 5/9 Secondary reference U.S. Government activity |
| 122897L4-9F | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-476-6938 is a Bolt,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-476-6938 has 14 manufacturer part numbers on file: HP7753L4-9F (Heartland Precision Fasteners Inc), 122897L4-9F (Sps Technologies, Llc Dba PB Fasteners), ST3M753L4-9F (Saturn Fasteners Inc), 11829L4-9F (Reid Products Inc. Dba Reid Products Inc), SLB255-L4-9F (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 9 more.
Key specifications for HP7753L4-9F: Extended Washer Thickness: 0.036 INCHES NOMINAL IN; Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.030 INCHES NOMINAL IN; Extended Washer Diameter: 0.470 INCHES NOMINAL IN. 15 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.