

🔩 Lock in strength, resist rust, and build with confidence!
These Type 316 stainless steel hex head bolts (1/4-20 x 1/2") come in a pack of 25 and are engineered for marine-grade corrosion resistance. Featuring coarse threading and a hexagonal head, they deliver reliable fastening performance in chemical, saltwater, and coastal environments where standard stainless steel fails.
| Material | Type 316 Stainless Steel |
| Thread Size | 1/4"-20 |
| Exterior Finish | Stainless Steel |
| Manufacturer Grade | Grade 316 |
| Head Style | Hex |
| Fastener Type | Hexagon Bolt |
| Brand | Marine Bolt Supply |
| Thread Type | Coarse Threaded |
| Item Diameter | 0.25 Inches |
| Thread Style | Coarse |
| Item Hardness | marine grade |
| Size | 1/4-20 x 1/2" |
| Head Type | Hex |
| Thread Class | 1B |
| UPC | 634385957132 |
| Manufacturer | CMC Industrial Supply |
| Part Number | 6-FHC |
| Is Discontinued By Manufacturer | No |
| Finish | Glossy |
| Shape | Hexagonal With Cylindrical Body |
| Item Package Quantity | 25 |
| Cutting Diameter | 0.25 Inches |
| Measurement System | Inch |
| Batteries Included? | No |
| Batteries Required? | No |
P**D
Quality stainless steel bolts
I needed stainless steel bolts that were 1-1/4" long for use with concrete drop-in anchors for swimming pool safety rail installation. This is not a length readily available at Home Depot, Lowes, or my local hardware store and so I ordered via Marine Bolt Supply. They appear to be of very high quality and did the job. I am a mechanical engineer by training and have seen some poor quality hardware evidently sourced from questionable suppliers but these bolts were perfect.
L**T
Great quality product at a very good price
DIY Projects and repairs to replace some rusting bolts
B**D
Used as replacement keel bolts for a Catalina 22 Swing ...
Used as replacement keel bolts for a Catalina 22 Swing Keel. Replacing these 4 bolts every couple years is cheap insurance!
C**S
shipping
thanks
J**W
Five Stars
As described. No complain. Used all to build my mpcnc.
D**S
Quick shipping and well made
No problems with them!
T**.
6 of 8 Broke
Of the 8 bolts I used 6 of them broke while removing simple nylon lock nuts. I had to remove them since the nuts got 3/4 of the way and then wouldn't tighten further. This is using a 3/8 drive manual ratchet.
Trustpilot
2 days ago
1 month ago