The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-203-6812, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Grimes Aerospace Company. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-203-6812 |
| Primary Part Number | HFU 7900-12D-M-16 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| First Diameter From Head | 0.205 INCHES MINIMUM AND 0.206 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.625 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.563 INCHES NOMINAL IN |
| Width Between Flats | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Extended Washer Thickness | 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE II,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Head Height | 0.308 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 28 |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Length | 0.625 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Width Across Flats | 0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| Successor | 5306-01-242-1070 (25493R1) |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| HFU7900-12D-M-1 | Huck Intl Inc (USA) |
| HFU7900-12D-M-16 | Huck International, Inc (USA) |
| S-2581 | Huck Intl Inc (USA) |
| HFU 7900-12D-M-16 | Huck Intl Inc (USA) |
| HFU 7900-12D-M-16 PRIMARY | Grimes Aerospace Company (USA) |
| CS1014-01 | Fastener Technology Corp (USA) |
| FT1148-13-14 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
NSN 5306-01-203-6812 is a Bolt,internal Wrenching, manufactured by Grimes Aerospace Company, classified under FSC 5306 (No Item Name Available). Status: active.
NSN 5306-01-203-6812 has 7 cross-referenced part numbers: HFU7900-12D-M-1 (Huck Intl Inc), HFU7900-12D-M-16 (Huck International, Inc), S-2581 (Huck Intl Inc), HFU 7900-12D-M-16 (Huck Intl Inc), HFU 7900-12D-M-16 (Grimes Aerospace Company) and 2 more.
There are 3 known substitutes for 5306-01-203-6812: 5306-01-242-1070, 5930-01-195-7567, 5305-01-215-6946. Verify interchangeability with system specifications before substitution.
Key specifications for HFU 7900-12D-M-16: First Diameter From Head: 0.205 INCHES MINIMUM AND 0.206 INCHES MAXIMUM IN; Extended Washer Diameter: 0.625 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of First Diameter: 0.563 INCHES NOMINAL IN; Width Between Flats: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN. 18 total characteristics are documented in the Federal Logistics Information System.