Brass Nuts to DIN / ISO · Jamnagar, India

DIN 557 Brass Square Nut

Square nut (four-sided) — machined in brass CW614N to standard and to your drawing.

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A DIN 557 nut is a four-sided (square) nut whose flat sides give a larger bearing surface and let it seat against an edge or channel to resist rotation while tightening; it has no current ISO equivalent. Brassland machines it from free-cutting brass CW614N (CuZn39Pb3) — or lead-free CW724R — to the standard and to your drawing, as part of our brass nut programme.

DIN 557 brass square nut — engineering drawing

DIN 557 — engineering drawing (Brassland). Plan view and section with dimension references.

Specification

Standard	DIN 557
Type	Square nut (four-sided)
Thread	M5–M16; larger on request
Material	CW614N (CuZn39Pb3); lead-free CW724R on request
Certificate	EN 10204 3.1 per shipment; 3.2 on request

Datasheet — dimensions to DIN 557

Thread d	Width A/F s	Across corners e	Height m
M5	8	11.3	4
M6	10	14.1	5
M8	13	18.4	6.5
M10	17	24.0	8
M12	19	26.9	10
M16	24	33.9	13

Dimensions in mm to DIN 557. Sizes and tolerances are made to your drawing on request.

Applications

Typical applications for the Brass Square Nut include channel / strut and slotted-frame fastening, woodworking and timber connections, T-slot and jig fixturing, and sign and panel mounting in extruded profiles. As all parts are made to order, sizes, threads, plating and certification are tailored to your specification.

Product

Brass Nuts Catalogue

All DIN/ISO nut types.

View →Material

CW614N (CuZn39Pb3)

Standard free-cutting brass datasheet.

View →Industry

Switchgear & Electrical

Busbar and terminal nuts.

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Electronics & PCB

Panel and board hardware.

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Custom Brass Parts

Non-standard nuts to your drawing.

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Thread Standards

Metric, BSP and UNC thread reference.

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Other brass nuts in this range

ASME B18.2.2 Brass Hex Nuts & Jam Nuts (UNC/UNF) · ASME B18.6.3 Brass Machine Screw Nuts (UNC) · DIN 1587 Brass Acorn Cap Nut (High Form) · DIN 1804 Brass Slotted Round Nut · DIN 1816 Brass Cross-Hole Round Nut · DIN 439 Brass Thin Hex Nut · DIN 466 Brass Knurled Thumb Nut (High Form) · DIN 467 Brass Knurled Thumb Nut (Flat) · DIN 546 Brass Slotted Round Nut · DIN 547 Brass Two-Hole Round Nut · DIN 6330 Brass High Hex Nut (1.5×d) · DIN 6334 Brass Coupling Nut (3×d) · DIN 6923 Brass Hex Flange Nut · DIN 917 Brass Cap Nut (Low Form) · DIN 934 Brass Hex Nut · DIN 935 Brass Castle (Slotted) Nut · DIN 936 Brass Thin Jam Nut · all brass nuts.

Frequently asked questions

Why use a square nut instead of a hex nut?

The four flat sides give more bearing contact and seat against an edge or in a channel, resisting rotation while you tighten — useful in T-slots, struts and timber.

What is the across-corners (e) of a DIN 557 nut?

The diagonal is about s×1.414 — e.g. 24.0 mm at M10 (s = 17 mm). See the datasheet for all sizes.

Is there an ISO equivalent to DIN 557?

No — ISO did not adopt a metric square nut, so DIN 557 remains the governing standard.

What sizes are DIN 557 square nuts made in?

The standard range is M5–M16 for the dimensions shown; larger sizes are available to order.

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