At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of ASME B18.2.4.5M. ASME B18.2.4.5M covers the general and dimensional data for metric hex jam nuts, which are thin hex nuts used to lock a primary nut or as a low-profile nut. It defines width across flats, width across corners and the reduced thickness. The standard covers nominal sizes from M5 through M36.
ASME B18.2.4.5M covers the general and dimensional data for metric hex jam nuts, which are thin hex nuts used to lock a primary nut or as a low-profile nut. It defines width across flats, width across corners and the reduced thickness. The standard covers nominal sizes from M5 through M36.
A thin (jam) hexagonal nut with a chamfered face, typically tightened against a standard nut to prevent loosening or used where clearance is limited.
Key dimensions for common sizes are listed below.
| Nominal Size | Width Across Flats (mm) | Width Across Corners (mm) | Thickness (mm) |
|---|---|---|---|
| M5 | 8 | 9.24 | 2.7 |
| M6 | 10 | 11.55 | 3.2 |
| M8 | 13 | 15.01 | 4.0 |
| M10 | 16 | 18.48 | 5.0 |
| M12 | 18 | 20.78 | 6.0 |
| M14 | 21 | 24.25 | 7.0 |
| M16 | 24 | 27.71 | 8.0 |
| M20 | 30 | 34.64 | 10.0 |
| M24 | 36 | 41.57 | 12.0 |
| M30 | 46 | 53.12 | 15.0 |
| M36 | 55 | 63.51 | 18.0 |
Metric coarse internal threads per ASME B1.13M, tolerance class 6H.
Thin/jam counterpart to ASME B18.2.4.1M/.2M metric hex nuts; comparable to ISO 4035 / DIN 439 thin nuts.
For the official ASME standards catalogue, see the ASME standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We produce ASME B18.2.4.5M fasteners in carbon and alloy steel, austenitic, duplex and super-duplex stainless, and high-nickel, titanium and copper alloys — for structural, flanged, machinery and process applications worldwide.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
ASME B18.2.4.5M covers the general and dimensional data for metric hex jam nuts, which are thin hex nuts used to lock a primary nut or as a low-profile nut. It defines width across flats, width across corners and the reduced thickness. The standard covers nominal sizes from M5 through M36.
Ananka Fasteners manufactures ASME B18.2.4.5M in sizes from M5–M36. See the Dimensional Table above for the complete size breakdown.
Metric coarse internal threads per ASME B1.13M, tolerance class 6H.
We produce ASME B18.2.4.5M fasteners in carbon and alloy steel, austenitic, duplex and super-duplex stainless, and high-nickel, titanium and copper alloys — for structural, flanged, machinery and process applications worldwide.
Yes. For a quotation, provide the required nominal size, material grade, quantity and any inspection or certificate requirements.
Need a fastener manufactured to ASME B18.2.4.5M for an industrial project? Send the required fastener type, size, material grade, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: ASME B18.2.4.5M requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per ASME B18.2.4.5M and industry references; provided for reference only — confirm against the current edition of the standard before design use.
