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DIN 127-A SPRING WASHER — Size Navigator

Deterministic evaluation of fastener standards based on geometry, material, and compliance constraints. Complete engineering specifications across all 108 size/grade/finish variants.

DIN 127-A Hex Bolt Dimensions

Spring lock washers, metric series. Nominal dimensions for width across flats (s) and head height (k) across 27 metric sizes. Values in millimetres.

Size	Width Across Flats (s)	Head Height (k)
M6	1.6	0.2
M7	1.6	0.2
M8	2	0.3
M10	2.2	0.3
M12	2.5	0.4
M14	3	0.4
M16	3.5	0.4
M18	3.5	0.4
M20	4	0.4
M22	4	0.4
M24	5	0.5
M27	5	0.5
M30	6	0.8
M36	6	0.8
M39	6	0.8
M42	7	0.8
M45	7	0.8
M48	7	1
M52	8	1
M56	8	1
M60	8	1
M64	8	1
M68	8	1
M72	8	1
M80	8	1
M90	8	1
M100	8	1

Equivalent Standards

DIN 127-A is dimensionally cross-referenced with the following standards:

DIN 127
EN ISO 7087

Select Size & Grade

Standard

Diameter

Material Grade

Compatibility Result

INSTALLABLE

No constraint violation detected.

Risk Level

0.12

Low structural risk

Evaluation Steps

/standards/din-127-a/

Canonical equivalence resolved

📋 [EVALUATION LOG]

INPUT → STANDARD: DIN 127-A | SIZE: M12 | GRADE: 8.8

✓ STEP 1 → Geometry validation: PASS

✓ STEP 2 → Thread compatibility: PASS

✓ STEP 3 → Load constraint: PASS

ℹ STEP 4 → ISO mapping check: MATCH

✓ RESULT → INSTALLABLE (score 0.12)

📋 Standard Information

Standard DIN 127-A

Category WASHERS

Type WASHER

Total Specs 108

Available Sizes 27

Material Grades A2-70, A4-70

Surface Finishes Plain, Stainless Steel

🔗 Cross-Standard Equivalence

Standard	Name	Status	Risk Note
DIN 127-A, DIN 7980, DIN 934, DIN 125-A, ISO 4032, ISO 4017, ISO 7089, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, ASME B18.3, ISO 4762	Equivalent standards in cluster	IN CLUSTER	—

Related Standard	Relationship	Confidence
DIN 7980	Equivalent	0.90
DIN 934	Matching	0.80

🧭 Browse by Topic

DIN 127-A in the concept layer — Fastener Knowledge:

Metric Fasteners — Metric designation, thread class and DIN / ISO equivalents.
Fastener Standards — How a standard number becomes engineered data.

📏 Size Navigator

Select a size to view its complete engineering data — including dimensional tolerances, material grades, mechanical properties, and surface finish options.

M6 4 variants → M7 4 variants → M8 4 variants → M10 4 variants → M12 4 variants → M14 4 variants → M16 4 variants → M18 4 variants → M20 4 variants → M22 4 variants → M24 4 variants → M27 4 variants → M30 4 variants → M36 4 variants → M39 4 variants → M42 4 variants → M45 4 variants → M48 4 variants → M52 4 variants → M56 4 variants → M60 4 variants → M64 4 variants → M68 4 variants → M72 4 variants → M80 4 variants → M90 4 variants → M100 4 variants →

🔄 Standard Redirect Map

Non-canonical standard paths are automatically redirected to their canonical ISO equivalents via the Engineering Data Authority Lock. Equivalent standards: DIN 127-A, DIN 7980, DIN 934, DIN 125-A, ISO 4032, ISO 4017, ISO 7089, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, ASME B18.3, ISO 4762

Source (Non-Canonical)	Target (Canonical Route)
/din-7980/	/standards/din-127-a/

                CEV-1 HASH: ca26fde585d091034b92e2e3957506e427b4d4ea381c91a33085bc57a3050dae
                FROZEN: 2026-08-17 20:13:55
                ASSET: standard_map_core.csv
                CLUSTER: [DIN 127-A, DIN 7980, DIN 934, DIN 125-A, ISO 4032, ISO 4017, ISO 7089, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, ASME B18.3, ISO 4762]
            
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DIN 127-A Spring Lock Washer per DIN 127-A specification, available in A2-70 grade with Stainless Steel finish. Engineered for industrial OEM applications requiring 700.0 MPa tensile strength and reliable long-term fastening performance.

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