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DIN 125-A FLAT WASHER — Size Navigator

Deterministic evaluation of fastener standards based on geometry, material, and compliance constraints. Complete engineering specifications across all 76 size/grade/finish variants.

DIN 125-A Hex Bolt Dimensions

Plain washers, metric series, product grade A. Nominal dimensions for width across flats (s) and head height (k) across 19 metric sizes. Values in millimetres.

Size	Width Across Flats (s)	Head Height (k)
M6	6.4	1.8
M7	7.4	1.8
M8	8.4	1.8
M10	10.5	2.2
M12	13	2.7
M14	15	2.7
M16	17	3.3
M18	19	3.3
M20	21	3.3
M22	23	3.3
M24	25	4.3
M26	27	4.3
M27	28	4.3
M28	29	4.3
M30	31	4.3
M32	33	5.6
M33	34	5.6
M35	36	5.6
M36	37	5.6

Equivalent Standards

DIN 125-A is dimensionally cross-referenced with the following standards:

ISO 7089
EN ISO 7089
DIN 125

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-125-a/

Canonical equivalence resolved

📋 [EVALUATION LOG]

INPUT → STANDARD: DIN 125-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 125-A

Category WASHERS

Type WASHER

Total Specs 76

Available Sizes 19

Material Grades A2-70, A4-70

Surface Finishes Plain, Stainless Steel

🔗 Cross-Standard Equivalence

Standard	Name	Status	Risk Note
DIN 125-A, ISO 7089, DIN 934, DIN 127-A, DIN 7980, ISO 4017, ISO 4014, ISO 4032, 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
ISO 7089	Equivalent	0.95
DIN 934	Matching	0.80

🧭 Browse by Topic

DIN 125-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.

M1.6 1 variants → M2 1 variants → M2.5 1 variants → M3 1 variants → M3.5 1 variants → M4 1 variants → M5 1 variants → 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 → M33 4 variants → M36 4 variants → M39 1 variants → M42 1 variants → M45 1 variants → M48 1 variants → M52 1 variants → M56 1 variants → M60 1 variants → M64 1 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 125-A, ISO 7089, DIN 934, DIN 127-A, DIN 7980, ISO 4017, ISO 4014, ISO 4032, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, ASME B18.3, ISO 4762

Source (Non-Canonical)	Target (Canonical Route)
/iso-7089/	/standards/din-125-a/

                CEV-1 HASH: 8371444a90b010ab7986b501e67860c6bb23431532861987329b7628fc65f676
                FROZEN: 2026-08-17 20:13:55
                ASSET: standard_map_core.csv
                CLUSTER: [DIN 125-A, ISO 7089, DIN 934, DIN 127-A, DIN 7980, ISO 4017, ISO 4014, ISO 4032, ASME B18.2.1, ASME B18.2.2, ASME B18.21.1, ASME B18.3, ISO 4762]
            
✓ CEV-1 Verified

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DIN 125-A Flat Washer per DIN 125-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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