What ISO standards replace DIN 982?

DIN EN ISO 7040 is the formal coarse-pitch replacement path, while DIN EN ISO 10512 is the fine-pitch path. Preserve the complete diameter and pitch and compare the selected size, dimensions, nut class and prevailing torque.

Is ISO 7041 the equivalent of DIN 982?

No. ISO 7041 is the related ISO high/Style 2 coarse-pitch family, but it is not the formal DIN 982 replacement. DIN 982 formally routes to ISO 7040 for coarse pitch and ISO 10512 for fine pitch.

Why does DIN 982 high form map to ISO 7040 regular nuts?

The labels belong to different classification systems. DIN called 982 high relative to low DIN 985; ISO classifies the successor geometry as regular/Style 1 and reserves high/Style 2 for ISO 7041. The formal replacement record and dimensions govern.

Which standard covers fine-pitch DIN 982 nuts?

ISO 10512 is the formal fine-pitch replacement path. Preserve the complete designation, such as M20 × 1.5; do not reduce it to M20 or substitute coarse-pitch ISO 7040.

What is the difference between DIN 982, DIN 985 and DIN 980?

DIN 982 is the high non-metallic-insert pattern, DIN 985 is the lower non-metallic-insert pattern, and DIN 980 uses all-metal prevailing-torque locking. Height, locking mechanism and service limits differ.

Does DIN 982 include a built-in washer?

No. DIN 982 defines the nut and its normal bearing face, not an integral washer or flange. Specify a separate washer independently when the joint requires one.

Do DIN 982, ISO 7040 and ISO 10512 have a universal 120°C limit?

No. Temperature capability and reuse depend on the actual insert polymer, material, coating, chemicals, installation and manufacturer specification. A product-specific rating is not universal to every nut under the standard.

Are ASME B18.16.6 and JIS B 1181 direct DIN 982 equivalents?

No. Keep both as approximate regional cross-references. ASME B18.16.6 covers another standards system and multiple locknut styles; JIS B 1181 does not by itself prove the DIN 982 non-metallic-insert locking construction.

Engineering reference

DIN 982 vs ISO 7040 / ISO 10512: Replacement

Prevailing torque hexagon nuts with non-metallic insert

Cross-reference for DIN 982 vs ISO 7040 / ISO 10512 (fine pitch) — Prevailing torque hexagon nuts with non-metallic insert. Published equivalents: DIN 982 / ISO 7040 / ISO 10512 (fine pitch) / ASME B18.16.6 / JIS B1181 / DIN EN ISO 7040 / DIN EN ISO 10512 (fine pitch). Use this page when converting drawings, checking supplier quotes, or matching catalog products.

Public equivalents

DIN 982
ISO 7040 / ISO 10512 (fine pitch)
ASME B18.16.6
JIS B1181
DIN EN ISO 7040 / DIN EN ISO 10512 (fine pitch)

Standard equivalents

DIN	DIN 982
ISO	ISO 7040 / ISO 10512 (fine pitch)
ANSI/ASME	ASME B18.16.6
JIS	JIS B1181
DIN EN / DIN EN ISO	DIN EN ISO 7040 / DIN EN ISO 10512 (fine pitch)

Equivalents are for engineering reference only. * marks a related standard that is not directly interchangeable. Dimensional tolerances, property classes and thread systems can differ — always confirm against the project specification before substitution.

Equivalent guide

Quick answer: what replaces DIN 982?

DIN 982 coarse-pitch nuts were formally replaced by DIN EN ISO 7040; DIN 982 fine-pitch nuts were replaced by DIN EN ISO 10512. The purchasing relationship is therefore:

DIN 982 coarse pitch → ISO 7040: regular/Style 1 prevailing-torque hexagon nut with non-metallic insert
DIN 982 fine pitch → ISO 10512: regular/Style 1 prevailing-torque hexagon nut with non-metallic insert, metric fine pitch
ISO 7041: high/Style 2 coarse-pitch family; related product, but not the formal DIN 982 replacement

DIN 982:1987 is withdrawn. A legacy order must retain the complete diameter and pitch, because DIN 982 M20 × 1.5 follows the fine-pitch branch and must not be converted to coarse-pitch ISO 7040.

View the coarse-pitch DIN 982 / ISO 7040 drawing and dimensions, or compare the lower DIN 985 / ISO 10511 family.

Why “DIN high form” still maps to ISO 7040 regular nuts

The wording looks contradictory but uses two different classification systems:

DIN 982 was called hohe Form — high form relative to the lower DIN 985 pattern.
ISO 7040 classifies the successor geometry as a regular/Style 1 nut.
ISO 7041 defines a separate ISO high/Style 2 family.

The words “high” in the old DIN title and “high” in ISO 7041 do not create a one-to-one standards relationship. The DIN withdrawal record and the applicable dimensional/thread series govern the mapping, not the English adjective alone.

Correct relationship and status table

Standard	Product configuration	Relationship to DIN 982	Procurement use
DIN 982:1987	Legacy non-metallic-insert lock nut, DIN high form	Withdrawn source standard	Preserve the complete old callout and drawing
ISO 7040 / DIN EN ISO 7040	Regular/Style 1, non-metallic insert, coarse pitch	Formal coarse-pitch replacement path	Primary ISO comparison for ordinary coarse-thread DIN 982 orders
ISO 10512 / DIN EN ISO 10512	Regular/Style 1, non-metallic insert, fine pitch	Formal fine-pitch replacement path	Use when the legacy designation states a fine pitch
ISO 7041	High/Style 2, non-metallic insert, coarse pitch	Related higher ISO family, not the formal replacement	Consider only when the required Style 2 geometry and performance are specified
ISO 10511	Thin/low, non-metallic insert	DIN 985-related lower family	Not a DIN 982 replacement
ASME B18.16.6	US prevailing-torque locknut family with multiple styles	Approximate regional reference	Confirm inch/metric system, exact style, dimensions and performance
JIS B 1181	Broad Japanese hexagon-nut reference	Incomplete as a direct locking-nut equivalent	Require an exact JIS product type and locking specification

Height and coarse/fine-pitch matrix

Requirement	Correct reference	Height classification	Thread branch
Legacy DIN 985	ISO 10511	Low/thin	Confirm the complete legacy thread
Legacy DIN 982, coarse	ISO 7040	ISO regular/Style 1	Metric coarse pitch
Legacy DIN 982, fine	ISO 10512	ISO regular/Style 1	Metric fine pitch
ISO high nut requirement	ISO 7041	ISO high/Style 2	Metric coarse pitch

This matrix keeps height and pitch as separate selection axes. ISO 10512 is regular height and fine pitch, not a high nut. ISO 7041 is high and coarse pitch, but that does not make it the formal DIN 982 successor.

DIN 982 vs ISO 7040 / ISO 10512: explicit differences

Difference point	DIN 982	ISO successor family	Purchasing impact
Standard status	Withdrawn 1987 DIN edition	Current ISO/DIN EN ISO edition must be stated	Do not order by number alone
Height terminology	DIN high form	ISO regular/Style 1	Similar words cannot be used to select the standard
Thread routing	Legacy order may be coarse or fine	ISO 7040 coarse; ISO 10512 fine	Preserve a pitch such as `M20 × 1.5`
Width across flats `s`	Legacy DIN wrench series	ISO wrench series	Socket size and surrounding tool clearance can change
Width across corners `e`	DIN limits	ISO limits	Radial assembly clearance can change
Nut/body height `m`	DIN geometry	ISO 7040/10512 geometry	Changes thread engagement, stack height and bolt projection
Bearing-face diameter `dw`	DIN bearing limits	ISO bearing limits	Changes contact area on a washer or joint surface
Chamfers and insert zone	DIN form and tolerances	ISO form and tolerances	Affects axial clearance and inspection
Size range	Controlled by the DIN edition	Controlled by the selected ISO edition	Not every nominal diameter has the same coverage
Product grade/tolerances	Legacy DIN references	Current ISO product grades and limits	Equal nominal size does not prove equal limit dimensions
Nut class and proof load	Legacy property requirements	Current referenced mechanical-property system	Reconfirm the nut class and mating bolt
Prevailing torque	Legacy test/acceptance requirements	Current performance and reuse requirements	Dimensional fit does not prove locking performance
Marking and documentation	Legacy DIN rules	Current ISO labelling and traceability	Update the inspection and certificate requirements

Concrete dimensional examples

Common DIN 982-to-ISO 7040 conversion tables show measurable changes at several shared sizes. These examples are useful for screening, but the controlled editions and supplier drawing govern the purchase:

Thread	DIN 982 `s`	ISO 7040 `s`	DIN 982 height	ISO 7040 height
M10	17 mm	16 mm	11.5 mm	11.9 mm
M12	19 mm	18 mm	14.0 mm	14.9 mm
M14	22 mm	21 mm	16.0 mm	17.0 mm

Published conversion data also show bearing-face differences, for example dw min values of 15.6 mm versus 14.63 mm at M10, 17.4 mm versus 16.63 mm at M12, and 20.5 mm versus 19.64 mm at M14. These differences affect wrenching, counterbore clearance and seating area even when the thread assembles correctly.

Do not use these ISO 7040 figures as ISO 7041 dimensions. If Style 2 ISO 7041 is proposed, compare its own controlled size row separately.

Why ISO 7041 must stay in the article

ISO 7041 is worth mentioning because buyers frequently search DIN 982 ISO 7041 and both products use a non-metallic insert. The article should answer that search without turning it into a false equivalence.

ISO 7041:2025 covers ISO high nuts with a non-metallic insert, metric coarse-pitch threads M5–M39, and product grades A and B. It is a related Style 2 option with its own height, dimensions and mechanical requirements. Use it only when the drawing or approved replacement specification calls for that high ISO family.

Locking mechanism, washer and related DIN families

DIN 982, ISO 7040, ISO 10512 and ISO 7041 all create prevailing torque through a non-metallic insert. “Nylon insert” is a common commercial description, but the actual polymer must be confirmed when temperature, chemicals or ageing matter.

DIN 982 does not include an integral washer or flange. Its bearing face must not be advertised as a built-in washer.

Standard	Main distinction
DIN 985 / ISO 10511	Lower/thinner non-metallic-insert family
DIN 982 / ISO 7040 or ISO 10512	Legacy DIN high form routed by coarse/fine pitch
ISO 7041	Separate ISO high/Style 2 coarse-pitch family
DIN 980	All-metal prevailing-torque locking; no polymer insert

The taller DIN body does not by itself prove better vibration resistance. Locking performance depends on the insert, mating thread, coating, lubrication and prevailing-torque test.

Material, temperature and reuse

Specify the nut property class or exact stainless-steel designation separately. Do not say the nut class simply “equals or exceeds” a bolt class such as 8.8 or 10.9; compatibility is determined by the applicable mechanical-property requirements and proof load.

There is no universal 120°C rating for all DIN 982, ISO 7040 or ISO 10512 nuts. Temperature capability belongs to the actual insert material and product specification. Confirm continuous and peak temperature plus exposure to oils, fuels, solvents and cleaners.

Reuse is permitted only when the governing requirement allows it and the nut still meets the minimum prevailing torque after the stated cycles. A visual inspection alone is insufficient for a critical joint.

DIN 982 RFQ and replacement checklist

Include:

Legacy DIN 982 edition and controlled drawing
Complete diameter and pitch
ISO 7040 for coarse pitch or ISO 10512 for fine pitch
Width across flats s and corners e
Nut/body height m, overall envelope and bolt projection
Bearing-face diameter dw, chamfers and insert-zone clearance
Product grade and dimensional tolerances
Nut class, proof load and mating-bolt specification
Body material, coating, lubrication and corrosion requirement
Insert material, temperature and chemical environment
Initial and reuse prevailing-torque limits
Marking, inspection documents, traceability and conversion approval

Examples:

Legacy DIN 982, M12 coarse pitch, Class 8, zinc plated; evaluate ISO 7040 using controlled s, e, m and dw dimensions and provide prevailing-torque results.

Legacy DIN 982, M20 × 1.5 fine pitch; evaluate ISO 10512, preserve the stated pitch and confirm dimensions, proof load, insert material and reuse torque.

Related resources

Bottom line: use ISO 7040 for the DIN 982 coarse-pitch replacement path and ISO 10512 for fine pitch. Keep ISO 7041 as a related Style 2 comparison, not as the DIN 982 equivalent.