Technical Specifications

DIN 127B / GB/T 93 / ASME B18.21.1 Spring Lock Washers Hardness:420 - 510 HV (Carbon Steel); HV ≥ 200 (Stainless Steel)140 HV / 200 HV / 300 H Plain, Zinc Plated, Hot Dip Galvanized, Mechanical Galv
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DIN 127B / GB/T 93 / ASME B18.21.1 Spring Lock Washers Hardness:420 - 510 HV (Carbon Steel); HV ≥ 200 (Stainless Steel)140 HV / 200 HV / 300 H Plain, Zinc Plated, Hot Dip Galvanized, Mechanical Galv
DIN 127B / GB/T 93 / ASME B18.21.1 Spring Lock Washers Hardness:420 - 510 HV (Carbon Steel); HV ≥ 200 (Stainless Steel)140 HV / 200 HV / 300 H Plain, Zinc Plated, Hot Dip Galvanized, Mechanical Galv
DIN 127B / GB/T 93 / ASME B18.21.1 Spring Lock Washers Hardness:420 - 510 HV (Carbon Steel); HV ≥ 200 (Stainless Steel)140 HV / 200 HV / 300 H Plain, Zinc Plated, Hot Dip Galvanized, Mechanical Galv

Standard

DIN 127B / GB/T 93 / ASME B18.21.1

Specification

M2 - M100

Material

Spring Steel(65Mn), Stainless Steel (A2/A4)

Property Class

Hardness:420 - 510 HV (Carbon Steel); HV ≥ 200 (Stainless Steel)140 HV / 200 HV / 300 H

Finish

Plain, Zinc Plated, Hot Dip Galvanized, Mechanical Galv

Product Description

Form B: Square ends

Technical Data & Drawings
Model: DIN 127B / GB/T 93 / ASME B18.21.1 Spring Lock Washers pdf
Dimension CodeSpecification (mm)
d
d (min)
d (max)
b (max)
b (min)
h (max)
h (min)
H (min)
H (max)
dc (max)

Technical Specifications

DIN 127-1987 Spring Lock Washers
Product No.
DIN 127
Product Specification
Φ2
Product Standard
DIN 127-1987
Material Grade
—
Unit
mm
Mechanical Property
—
Dimension CodeSpecification (mm)Dimension CodeSpecification (mm)
dDiameterΦ2d(min)dmin2.1
d(max)dmax2.4b(max)bmax1
b(min)bmin0.8h(max)hmax0.6
h(min)hmin0.4H(min)Hmin1
H(max)Hmax1.2dc(max)dcmax4.5
hHeight0.4–0.6bThread length0.8–1
Other Requirements
Technical Conditions
MaterialTypeSteelGeneral Technical Conditions
Grade
ThreadToleranceMechanical PropertyClass
StandardStandard
ToleranceProduct GradeSurface Treatment
Standard
Surface RoughnessSurface Defect
Acceptance & PackingReference Weight per 1000 (kg)

Packaging & Delivery

Surface Anti-Rust Treatment

Since spring steel is highly susceptible to oxidation, all products undergo a dewatering anti-rust oil immersion process before dispatch to ensure long-term protection during maritime transit.


Sorting & Inner Packaging

For small to medium sizes (M2–M12), we provide premium EternalFast blue-and-white branded boxes (standard 1,000 pcs/box) for easy inventory management and retail display.


Logistics & Weight Optimization

As spring washers are lightweight components, we recommend shipping them as "filler cargo" alongside heavy hex bolts and nuts. This helps optimize the container's weight-to-volume ratio and significantly reduces overall freight costs per unit.


Quality & Certificates

Elasticity Recovery Test

We perform random sampling for the "Triple Compression Test." Each washer is pressed flat three times; the permanent set is measured to ensure the free height recovery rate is no less than 90% of the original standard.


Hydrogen Embrittlement Mitigation

To prevent catastrophic brittle failure in electro-galvanized (zinc-plated) spring washers, we strictly implement a de-embrittlement baking process (200°C for 8 hours) within 4 hours of the plating completion.

Documentary Support

Every shipment is accompanied by a Material Test Report (MTC) 3.1, detailing the chemical composition (65Mn/AISI 1065) and hardness test results (420–510 HV).