At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of ASME B18.11. ASME/ANSI B18.11 (originally 1961, reaffirmed 1983; now a historical/withdrawn standard) covers miniature screws in slotted pan and slotted fillister head styles using the American Standard miniature screw thread series (approx. 0.30 mm to 1.40 mm nominal). Used in instruments, watches, optics and small electromechanical assemblies. Values below are representative head diameters for the miniature thread series.
ASME/ANSI B18.11 (originally 1961, reaffirmed 1983; now a historical/withdrawn standard) covers miniature screws in slotted pan and slotted fillister head styles using the American Standard miniature screw thread series (approx. 0.30 mm to 1.40 mm nominal). Used in instruments, watches, optics and small electromechanical assemblies. Values below are representative head diameters for the miniature thread series.
Slotted pan / fillister head miniature screw (miniature thread series)
Key dimensions for common sizes are listed below.
| Thread (UNM) | Nominal Dia (mm) | Pan Head Dia dk approx (mm) | Head Height k approx (mm) |
|---|---|---|---|
| 0.30 UNM | 0.30 | 0.60 | 0.18 |
| 0.40 UNM | 0.40 | 0.80 | 0.24 |
| 0.50 UNM | 0.50 | 1.00 | 0.30 |
| 0.60 UNM | 0.60 | 1.20 | 0.36 |
| 0.80 UNM | 0.80 | 1.60 | 0.48 |
| 1.00 UNM | 1.00 | 2.00 | 0.60 |
| 1.20 UNM | 1.20 | 2.40 | 0.72 |
| 1.40 UNM | 1.40 | 2.80 | 0.84 |
American Standard miniature screw threads (UNM series) per ANSI B1.10 / ISO 1501
[‘ANSI B1.10 (miniature screw threads)’, ‘ISO 1501 (ISO miniature screw threads)’, ‘ASME B18.6.3 (machine screws)’]
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 B18.11 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ASME/ANSI B18.11 (originally 1961, reaffirmed 1983; now a historical/withdrawn standard) covers miniature screws in slotted pan and slotted fillister head styles using the American Standard miniature screw thread series (approx. 0.30 mm to 1.40 mm nominal). Used in instruments, watches, optics and small electromechanical assemblies. Values below are representative head diameters for the miniature thread series.
Ananka Fasteners manufactures ASME B18.11 in sizes from 0.30 UNM–1.40 UNM. See the Dimensional Table above for the complete size breakdown.
American Standard miniature screw threads (UNM series) per ANSI B1.10 / ISO 1501
We produce ASME B18.11 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 B18.11 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 B18.11 requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per ASME B18.11 and industry references; provided for reference only — confirm against the current edition of the standard before design use.
