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| Price | Negotiable |
| MOQ | 50000 |
| Delivery Time | 15-20 work days |
| Brand | guanbiao |
| Place of Origin | China |
| Certification | ISO9001 |
| Model Number | M5*20 |
| Packaging Details | Plastic bag + carton + pallet |
| Payment Terms | T/T |
| Supply Ability | 5000000 |
| Total Length | 40.0mm | Place of Origin | China |
| Shape | Flat Head | Size | Various sizes available |
| Packaging Details | Plastic bag + carton + pallet | Color | Silvery White / Nature |
| Model Number | M5*20 | Supply Ability | 5000000 |
| Certification | ISO9001 | Thread | M2 , M2.6, M3 , M3.5, M4, M5 |
| Brand Name | guanbiao | Payment Terms | T/T |
| Product Material | Stainless Steel | Shape Type | round Head |
| Price | Negotiable | Delivery Time | 15-20 work days |
| Rust Proof | Yes | Oem | yes, Welcome, according to your drawing |
| Screw Length | 10 - 150mm | Minimum Order Quantity | 50000 |
| Production Process | Cold heading, cold forging | Case Hardness | HV210-270 |
| Trade Term | EXW |
Premium A4-70 knurled captive screws for corrosive/clean environments. Combo drive, captive design. Passivated or electropolished. For medical devices, lab & food processing equipment. Hygienic.
Meet the demanding hygiene and corrosion resistance requirements of medical, laboratory, and food processing equipment with our **A4 Stainless Steel Knurled Captive Screws**. Crafted from A4-70 (316) stainless steel, they offer **superior resistance** to salt water, chemicals, acids, and frequent cleaning agents. The **partially knurled cylindrical head** enables easy, frequent access, while the **smooth lower section** minimizes crevices for easy cleaning. The **Phillips/Slotted combo drive** ensures secure installation. The **captive washer system** prevents screw loss, critical in sterile environments. Available passivated or electropolished for maximum smoothness and cleanability.
TECHNICAL SPECIFICATIONS |
|
| Material | A4-70 Stainless Steel (316)** (ISO 3506) |
| Drive Type | Phillips/Slotted Combination (PH2 Phillips + 3-4mm Slotted) |
| Head Style | Cylindrical Head (Smooth lower shank, **Knurled upper grip section** - Fine groove knurl) |
| Sizes (Diameter x Length): |
Common: * M4 x 8mm, 10mm, 12mm, 16mm (Knurl Dia: ~6-7mm) * M5 x 10mm, 12mm, 16mm, 20mm (Knurl Dia: ~7-8mm) * M6 x 12mm, 16mm, 20mm, 25mm (Knurl Dia: ~9-10mm) |
| Surface Finish | Passivated (Standard)** or **Electropolished (EP)** (Recommended for high hygiene) |
| Panel Thickness Range | 1.0mm - 3.0mm. |
Primary Uses & Applications:
*
Medical
device
housings
&
access
panels.
*
Laboratory
equipment
&
analyzers.
*
Pharmaceutical
processing
&
packaging
machinery.
*
Food
&
beverage
processing
equipment.
*
Biotech
&
cleanroom
instrumentation.
*
Marine
scientific
equipment.
*
Chemical
handling
systems.
*
Any
application
requiring
frequent
access,
high
corrosion
resistance,
and
easy
cleaning/sanitization.
Surface
Treatment/Finishes:
*
**Passivation
(Standard):**
Mandatory
for
corrosion
resistance.
Removes
free
iron.
*
**Electropolishing
(Highly
Recommended):**
Significantly
smoothes
surfaces
(Ra
<
0.4
µm),
removes
micro-imperfections,
enhances
corrosion
resistance,
improves
cleanability,
reduces
bacterial
adhesion,
and
provides
a
bright,
easy-to-inspect
finish.
Compliant
with
FDA,
USDA,
3-A
Sanitary
Standards
for
hygienic
applications.
How to Use:
1.
**Panel
Prep:**
Install
**A4
stainless
steel
captive
receptacles**
(threaded
inserts/standoffs)
into
the
frame.
Ensure
material
compatibility.
2.
**Insert
Assembly:**
Insert
the
captive
screw
assembly
through
the
panel
hole.
3.
**Installation
(Tool):**
Use
a
**clean
PH2
or
slotted
driver**
to
tighten
the
screw
securely.
Achieve
metal-to-metal
contact
for
grounding
if
needed.
*Follow
sanitized
handling
procedures.*
4.
**Tool-Less
Access:**
For
routine
access,
**hand-tighten/loosen
using
the
knurled
grip**.
The
captive
design
prevents
screws
from
falling
into
sensitive
areas.
5.
**Cleaning:**
The
smooth
surfaces
(especially
electropolished)
and
minimized
crevices
allow
for
effective
cleaning,
wiping,
spraying,
or
autoclaving
(check
EP
specs).
No
threads
are
exposed
when
tightened.
6.
**Inspection:**
The
bright
EP
finish
allows
easy
visual
inspection
for
damage
or
contamination.
