Hex Head Captive Bolt Washers Stainless Steel A2 Fastener Screws
Hex head captive bolt with flat washer and spring washer , it is made of stainless steel grade A2 and polished surface , Standard metric M4 threads with length 8 mm .
Captive bolt has a smaller diameter shaft that stop washers to be backed out when both washers are installed on bolt ,
Items | Description | Remark | Picture | |
Material | Stainless | A2 |
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Finish / Plating | Polish |
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Hardness | 200 | HV | ||
Color | Silver |
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Standard | Customzied |
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Dimensions | Thread dia. | M4 | Head dia. | 7 |
Full length | 30 | Head height | 3.0 | |
Pitch | 0.6 | Head socket | NA |
1 . Perfect locking
Captive bolt washers are not easy to be sliipped out once installed .
2 . Not easy to be broken
Made of stainless steel with grade A2 , good ductility .
3. Install with high efficiency .
Do not install washers alone .
4 . Not easy to be rusted
5 . No burrs or scratch .
6 . Tiny magnet .
Tips for application
1 . Female threaded hole should be suitable for thread of captive bolt .
2 . Not suitalbe for damp or chemical instalation .
3 . Drive captive bolt by a spanner or hex pipe wrench .
Stainless steel captive bolt with washers are widely used to different industrial areas with locking requests .
Normal packing
1. In bulk : Polybag ( 1-5 kgs) and cartons (8-20 kgs ) , 0.01 CBM / CTN
2. Boxes : Box ( 1-3 kgs) and cartons ( 5-15 kgs ) , 0.01 CBM / CTN
3. All cartons to a pallet ( 1X1.2 m )
4. Customized packing | ![]() |
Note : Objects showed in picture are only for reference , not stand for described items .
We manufacture various hardware parts , you can find and click following descriptions to see more items .
Screws
| Various standard and non-standard fastener screws with qualified materials for different applications . |
Nuts and bolts | High tensile strength bolts nuts for engineering projects . |
Washers and spacers | Different materials washers and spacers for mechanical and clectronic parts |
Fastener Pins | Precise mechanical tolerances and good quality for industry . |
Plastic Parts | Customized manufacturing service and top materials for communication and electronics and auto etc . |
Precise testing equipments and tools for hardness , dimensions , corrosion resistance and pass rate etc . our tolerance for tools is up to 0.005 mm . | All products are compliance with RoHS and REACH standards | |
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Note : We are available for customized requests on quality
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Stamping parts with complicated designs , min. tolerances to 0.01mm (0.0004 inch ) , monthly capacity ups to 100 tons .
Availabe material : 1. Carbon steel 2. Brass 3. Aluminum 4. Stainless steel 5. Plastic 6. Various alloy steel eg. titanium alloy . | |
![]() | Precise turning machines and CNC , tolerances are up to 0.01 and 0.008 mm for limitaiton . 5 million pcs monthly capacity .
Availabe material :
1. Carbon steel 2. Brass 3. Aluminum 4. Stainless steel 5. Plastic 6. Various alloy steel eg. titanium alloy .
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Assorted fastener machines to make different screws , bolts , nuts and pins etc . Diameter from M0.8 to M30 . Monthly capacity ups to 300 tons .
Availabe material : 1. Carbon steel 2. Brass 3. Aluminum 4. Stainless steel 5. Plastic 6. Various alloy steel eg. titanium alloy . | ![]() |
Warm Tips
If you are interesting in stainless steel captive bolt wahser screws , please contact us via email or phone , we will get back to you within 12 hours , Thank you !