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Hygienic Stainless Steel Spacers

Hygienic Stainless Steel Spacers
VTS31 —— Hygienic Carriage Bolt

VTS31 —— Hygienic Carriage Bolt
VTBD —— Hygienic Breather Drain

VTBD —— Hygienic Breather Drain
VTPG Hygienic Design Blind Plugs

VTPG Hygienic Design Blind Plugs
VTF — Hygienic Leveling Feet

VTF — Hygienic Leveling Feet
VTN28 Hygienic Design Nut

VTN28 Hygienic Design Nut
VTS28 —— Hygienic Domed Hexagon Head Bolt

VTS28 —— Hygienic Domed Hexagon Head Bolt
VTCL —— Hygienic Cam Latch

VTCL —— Hygienic Cam Latch
VTS29 —— Hygienic Bolt

VTS29 —— Hygienic Bolt
VTKS —— Hygienic Star Knob

VTKS —— Hygienic Star Knob
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A range of AISI 316L stainless steel hygienic design hexagon head bolts with high-polish finish in multiple sizes.
AISI 316L stainless steel hygienic design hexagon head bolts with integrated blue sealing rings in multiple thread sizes.
Technical engineering drawing showing dimensions, thread sizes, and sealing ring placement for hygienic hexagon head bolts.

VTS29 —— Hygienic Bolt

Hygienic stainless steel slightly domed Hexagon head Bolt, Designed to meet EHEDG and 3-A Sanitary principles.

Engineered for high-sanitation environments, our Hygienic Design Bolts provide secure, contamination-free fastening for the food processing, beverage, and pharmaceutical industries. Designed in accordance with EHEDG and 3-A principles, these fasteners eliminate dead zones to prevent bacterial growth and biofilm formation.

Material:  Stainless Steel AISI 316L(1.4404)
Seal Material: FDA-compliant Blue HNBR/EPDM
Thread Range: M4 to M16
Surface Finish:  Matte finish (Ra < 0.8 µm)
Polished finish (Ra < 0.8 μm)
Compliance:  3-A, IP69K and FDA guidelines
    Data sheet CAD model
    product details

    Technical Drawing & Dimensions

    Technical engineering drawing showing dimensions, thread sizes, and sealing ring placement for hygienic hexagon head bolts.
    Part Series d3 L d1 d2 h A/F
    VTS29 M4 5 6 8 10 12 16 20 25 30 9.85 10.5 7.152 7
    VTS29 M5 5 6 8 10 12 16 20 25 30 35 40 45 50 10.85 11.5 7.63 8
    VTS29 M6 6 12 16 20 25 30 35 40 45 50 12.85 13.5 8.14 10
    VTS29 M8 8 16 20 25 30 35 40 45 50 55 60 70 75 15.85 16.4 9.12 13
    VTS29 M10 10 20 25 30 35 40 45 50 55 60 65 70 18.85 19.2 9.5 16
    VTS29 M12 20 25 30 35 40 45 50 55 60 65 70 75 80 21 22 10.5 18
    VTS29 M14 20 25 30 35 40 45 50 55 60 65 70 75 80 25 24.9 11.7 21
    VTS29 M16 20 25 30 35 40 45 50 55 60 65 70 75 80 28 27.8 12.7 24

    Low-Profile Applications

    VTS29 uses a slightly domed, low-profile head to reduce projection above the mounting surface. It is suited to compact assemblies where head height and surrounding clearance matter, including fastening points on stainless-steel gearboxes and motors used in food and pharmaceutical equipment.

    Technical Data

    Bolt body: AISI 316L stainless steel / EN 1.4404

    Certification: 3-A certified

    Surface finish: Matte or polished, Ra < 0.8 µm

    HNBR sealing ring: Blue, FDA-compliant material, 85 ±5 Shore A, -25 °C to +150 °C

    EPDM sealing ring: Blue, FDA-compliant material, 85 ±5 Shore A, -40 °C to +120 °C

    FDA compliance applies to the sealing-ring material, not to the complete bolt or installed assembly.

    Frequently Asked Questions

    What is the difference between HNBR and EPDM seals?

    HNBR: High mechanical strength and good resistance to oil, heat, wear, ozone, and ageing. Well suited to demanding sealing applications involving oils and lubricants.

    EPDM: Excellent resistance to weathering, ozone, hot water, and steam, with good flexibility at low temperatures. Generally unsuitable for petroleum-based oils and fuels.

    Based on our market observations, HNBR seals are common in food-processing equipment and EPDM seals in pharmaceutical equipment. For other applications, contact us to confirm the suitable material.

    Metal-to-Metal and Seal-Free Options

    Through our discussions with pharmaceutical equipment manufacturers, we have found that elastomer seals are unsuitable for some high-temperature sterilization and cleaning processes. However, these applications may still require sealing at the fastening point.

    Hygienic screw with a metal-to-metal seal: This option uses a metal-to-metal sealing design and requires the sealing contact surface to be precisely finished to Ra < 0.8 µm.

    Hygienic screw without a seal: This option is available for applications where sealing is not required.