6 catalogued sizes, dimensioned to DIN 7985 / ISO 7045 and EN ISO 10644. Pick any row and the technical drawing redraws to it.
SEMS Screws with Captive Flat Washers to DIN 7985 / ISO 7045 and EN ISO 10644 are catalogued in sizes M2.5 to M8, with pitch 0.45-1.25 mm, od 6-16 mm, thick 0.6-2 mm. 6 sizes are held in the table below, and the technical drawing redraws to whichever row you select.
Standard
DIN 7985 / ISO 7045 and EN ISO 10644
Size range
M2.5-M8
Pitch
0.45-1.25 mm
OD
6-16 mm
Catalogued sizes
6
Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.
Applications & Industries
Where SEMS Screws with Captive Flat Washers are used, and what decides the specification in each case. Stocked from M2.5 to M8.
Industries that specify SEMS Screws with Captive Flat Washers
Electrical assemblyCaptive flat-washer screws for panels, terminals and equipment covers.
Appliance productionHigh-volume screwdriving where a separate washer would slow assembly.
Sheet-metal enclosuresRemovable covers that must retain the washer on the screw.
Machine guardingService hardware that stays with the cover during removal.
Steel fabricationBolted connections in frames, enclosures, walkways and weldments, on the bench and on site.
Energy & infrastructureTower, pipework, switchgear and plant fixings specified for long service life and inspectable joints.
Typical applications
combining the screw and flat washer into one captive assembly
spreading bearing load while preventing washer loss during service
using a Phillips drive for controlled production installation
selecting the washer outside diameter and thickness with the thread size
clamping two machined faces to a calculated preload
bolting brackets, motors and gearboxes to a frame
Service conditions to specify against
Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
High load
Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
Torque and preload
The joint is designed around bolt tension, so lubrication, coating and the friction coefficient all change the torque figure — state them together.
Where to use something else
Do not substitute the captive washer for a hardened structural washer in a high-preload joint.
Do not use a machine thread into unthreaded sheet or timber; use a tapping screw, rivet nut or insert made for that parent material.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Request a Quotation for SEMS Screws with Captive Flat Washers
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (DIN 7985 / ISO 7045 and EN ISO 10644)
Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.
SEMS Screws with Captive Flat Washers (DIN 7985 / ISO 7045 and EN ISO 10644) are a type of screws used across industrial assembly. Below is the complete size table together with material, standard and application guidance.
What Are SEMS Screws with Captive Flat Washers?
SEMS Screws with Captive Flat Washers are screws defined by DIN 7985 / ISO 7045 and EN ISO 10644. They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.
Materials & Finishes
Common materials include carbon steel (typically zinc plated or hot-dip galvanized), alloy steel in property classes 8.8, 10.9 and 12.9, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, property class and surface finish appropriate to your load and environment.
Pricing
SEMS Screws with Captive Flat Washers are supplied to order. Pricing starts from approximately US$0.050 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.
Inside the plant
Manufactured in our own plant
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
01
Cold heading
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
02
Thread rolling
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
03
Heat treatment
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
04
Surface treatment
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
Frequently Asked Questions
Which standard governs SEMS Screws with Captive Flat Washers, and how are they driven?
SEMS Screws with Captive Flat Washers are manufactured to DIN 7985 / ISO 7045 and EN ISO 10644 and use a cross recess (Phillips/Pozi) drive. The dimensional values on this page follow that standard.
What sizes are available for SEMS Screws with Captive Flat Washers?
The table on this page lists 6 sizes for SEMS Screws with Captive Flat Washers, ranging from M2.5 to M8. Sizes outside the table can be quoted on request.
In which materials are SEMS Screws with Captive Flat Washers supplied?
SEMS Screws with Captive Flat Washers are supplied in alloy steel (typically 10.9 / 12.9 for socket screws), carbon steel and stainless A2 / A4, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for SEMS Screws with Captive Flat Washers.
How do I request a quotation?
Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.
Need a fastener quote or a spec sheet?Message our engineers on WhatsApp — send a drawing or DIN number and get pricing back fast.Start WhatsApp Chat →
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