Washers Weight Chart Size Chart MM KG | DIN 125 DIN 127 ISO 7089 | Akbar Fasteners Mumbai

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DIN 125 · DIN 127 · DIN 9021 · ISO 7089 · ISO 7090 · All Exotic Alloys · Mumbai

Plain Flat DIN 125 · Spring Helical DIN 127 · Large OD DIN 9021 · M5–M100 · MM & KG

Washers
Weight Chart
Size Chart MM KG

Akbar Fasteners Pvt. Ltd., Mumbai — complete washer size chart and weight chart in mm and kg for DIN 125 plain flat washers, DIN 127 spring helical washers, DIN 9021 large OD washers, and ISO 7089/7090 series. Sizes M5–M100. Inner diameter (ID), outer diameter (OD), thickness, and calculated weight per piece in grams and kg for carbon steel density. Exotic alloy washers in Hastelloy, Monel, Inconel, Nickel, Stainless Steel manufactured on request — same quality system as stud bolts and nuts.

DIN 125 / 127

ISO 7089 / 7090

M5–M100

Weight in Grams / KG

All Exotic Alloys

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Washer Types

M5–M100

Size Range

20+

Alloys Available

50+

Countries Export

Washer Types Available

All Washer Types & Standards

DIN 125 · ISO 7089 / 7090

Plain Flat Washers

ID slightly > bolt dia · Normal OD · t per DIN 125A/B

The standard washer for bolt and nut bearing face distribution. DIN 125A (without chamfer) and DIN 125B (with chamfer on OD). Load distribution under nut bearing face. Used in all ASME B16.5 stud bolt assemblies to protect flange face from nut galling. All exotic alloys M5–M100.

DIN 127 · ISO 7089 Form B

Spring Helical Washers

Split ring · Helical spring profile · Anti-vibration

Spring-loaded helical split ring washers providing axial spring force that resists nut loosening under vibration. DIN 127B (square cross-section). Used in vibrating chemical plant equipment, pump body connections, agitated vessel covers, and marine equipment where positive lock is required. All exotic alloys M5–M64.

DIN 9021 · ISO 7093

Large OD (Fender) Washers

OD ≈ 3× bolt dia · Extra bearing area

Extra-large outer diameter washers — OD approximately three times the bolt diameter — for bolt connections into soft substrate material: FRP (fibre-reinforced plastic) flanges, rubber-lined equipment, PTFE-lined vessels, composite panels, and all applications where the nut bearing stress must be distributed over a larger area than DIN 125 provides. M5–M100.

DIN 134 / ISO 7042 (Tab Washers)

Tab & Nord-Lock Style

Folded tab locking · Anti-rotation

Tab washers with a folded locking tab that engages a flat on the nut or a slot in the substrate to provide positive mechanical anti-rotation locking. Custom exotic alloy tab washers and Nord-Lock-equivalent double-cone wedge washers for vibrating chemical plant, high-pressure valve body bolts, and offshore subsea locking connections. M6–M48 in all exotic alloys.

Complete Size & Weight Charts

Washer Size Chart & Weight Chart — MM & KG

Dimensions per DIN 125, DIN 127, and DIN 9021. Weights calculated using carbon steel density (7.85 g/cm³). For exotic alloy weight multiply by density factor in the formula section below. Inner diameter (ID), outer diameter (OD), thickness (t), and nominal weight per piece in grams.

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Bolt Size	ID (d1) mm	OD (d2) mm	Thickness (t) mm	Wt/Pc (g) CS	Wt/100 Pcs CS (kg)
DIN 125A PLAIN FLAT WASHER — CARBON STEEL DENSITY 7.85 g/cm³ — MULTIPLY BY ALLOY FACTOR FOR EXOTIC ALLOYS
M5	5.3	10.0	1.0	0.53	0.053
M6	6.4	12.0	1.6	1.10	0.110
M8	8.4	16.0	1.6	2.23	0.223
M10	10.5	20.0	2.0	4.72	0.472
M12	13.0	24.0	2.5	8.13	0.813
M16	17.0	30.0	3.0	14.80	1.480
M20	21.0	37.0	3.0	22.70	2.270
M24	25.0	44.0	4.0	43.00	4.300
M30	31.0	56.0	4.0	72.00	7.200
M36	37.0	66.0	5.0	121.0	12.10
M42	43.0	78.0	7.0	224.0	22.40
M48	50.0	92.0	8.0	355.0	35.50
M56	58.0	105.0	9.0	515.0	51.50
M64	66.0	115.0	9.0	615.0	61.50
M72	74.0	125.0	10.0	800.0	80.00
M80	82.0	140.0	12.0	1120.0	112.0
M90	93.0	160.0	12.0	1480.0	148.0
M100	104.0	175.0	14.0	2130.0	213.0

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Bolt Size	ID (d1) mm	OD (d2) mm	Width (b) mm	Height (h) mm	Wt/Pc (g) CS	Wt/100 Pcs CS (kg)
DIN 127B SPRING HELICAL WASHER — SQUARE CROSS-SECTION — CARBON STEEL DENSITY 7.85 g/cm³
M5	5.1	9.2	2.0	2.0	0.75	0.075
M6	6.1	11.2	2.5	2.5	1.34	0.134
M8	8.1	14.8	3.2	3.2	3.00	0.300
M10	10.2	18.4	4.0	4.0	5.70	0.570
M12	12.2	22.0	5.0	5.0	10.60	1.060
M16	16.2	29.0	6.0	6.0	22.70	2.270
M20	20.2	36.0	7.0	7.0	39.00	3.900
M24	24.5	44.0	9.0	9.0	82.00	8.200
M30	30.5	55.0	10.0	10.0	137.0	13.70
M36	36.5	65.0	12.0	12.0	228.0	22.80
M42	42.5	76.0	14.0	14.0	368.0	36.80
M48	48.5	88.0	16.0	16.0	546.0	54.60
M56	56.5	102.0	18.0	18.0	790.0	79.00
M64	64.5	115.0	20.0	20.0	1080.0	108.0

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Bolt Size	ID (d1) mm	OD (d2) mm	Thickness (t) mm	Wt/Pc (g) CS	Wt/100 Pcs CS (kg)
DIN 9021 LARGE OD WASHER (FENDER WASHER) — OD ≈ 3× BOLT DIA — CARBON STEEL DENSITY 7.85 g/cm³
M5	5.5	15.0	1.2	1.73	0.173
M6	6.6	18.0	1.6	3.30	0.330
M8	9.0	25.0	2.0	8.00	0.800
M10	11.0	30.0	2.5	14.80	1.480
M12	13.5	37.0	3.0	27.00	2.700
M16	17.5	50.0	3.0	54.00	5.400
M20	22.0	60.0	4.0	100.0	10.00
M24	26.0	72.0	5.0	172.0	17.20
M30	33.0	90.0	6.0	336.0	33.60
M36	39.0	105.0	8.0	614.0	61.40
M42	45.0	125.0	8.0	880.0	88.00
M48	52.0	140.0	10.0	1290.0	129.0

How to Calculate Washer Weight for Any Alloy

Washer Weight Formula & Alloy Density Factors

The tables above use carbon steel density (7.85 g/cm³). For exotic alloy washers, multiply the tabulated weight by the alloy density factor below. The weight calculation uses the flat annular ring volume formula.

DIN 125 Plain Flat Washer Weight Formula

Volume (cm³) = π/4 × [(OD)² − (ID)²] × t
÷ 1000 (convert mm³ → cm³)

Weight (g) = Volume × Density (g/cm³)

Example: DIN 125 M20
OD=37 ID=21 t=3 mm → CS: ~22.7 g
If Hastelloy C276 (9.22 g/cm³):
22.7 × (9.22/7.85) = 26.6 g

The same annular ring formula applies to DIN 127 spring washers (treat as solid ring of mean diameter × width × height) and DIN 9021 large OD washers. Weight per 1,000 pieces = weight per piece × 1,000 ÷ 1,000 kg. Always specify alloy and density when requesting washer weight for procurement documentation.

Material Density Reference — All Alloys

Carbon Steel

7.85 g/cm³

SS 304 / 316L

7.93 g/cm³

SS Duplex 2205

7.82 g/cm³

Hastelloy C276

8.89 g/cm³

Hastelloy C22

8.69 g/cm³

Hastelloy B3

9.22 g/cm³

Monel K500

8.44 g/cm³

Monel 400

8.80 g/cm³

Inconel 625

8.44 g/cm³

Inconel 718

8.19 g/cm³

Incoloy 825

8.14 g/cm³

Nickel 200

8.89 g/cm³

Titanium Gr2

4.51 g/cm³

17-4 PH (SS)

7.78 g/cm³

Density factor = Alloy density ÷ 7.85. Multiply tabulated CS weight by this factor to obtain exotic alloy weight per piece.

Washer Alloys — All Available

Exotic Alloy Washers — Complete Material Range

Washers available in all exotic alloys from same certified bar stock as stud bolts and nuts. Matched-heat washer supply — same MTC as stud bolt and nut set on request.

Ni-Cr-Mo · Mixed Acid

Washer Standards Reference

Washer Standards Coverage

All exotic alloy washers manufactured from the same ASTM-certified bar stock as stud bolts and nuts. PMI-verified. Full MTC, COC. Matched heat on request.

DIN / ISO

DIN 125 / ISO 7089

Plain flat washers — DIN 125A (without chamfer, most common) and DIN 125B (with chamfer on OD). ISO 7089 (normal series, 200 HV hardness) is the ISO equivalent. The standard ASME B16.5 stud bolt assembly washer form in exotic alloy service — load distribution under heavy hex nut bearing face. Dimensions match across DIN 125 and ISO 7089 for M5–M100.

DIN 125ADIN 125BISO 7089

DIN / ISO

DIN 127 / ISO 7090

Spring helical (split lock) washers — DIN 127B is the square cross-section spring washer used in vibration-service connections. ISO 7090 covers the same form. In exotic alloy service, spring washers are used for vibrating chemical plant equipment where positive locking is required without additional mechanical lock devices. M5–M64 in all exotic alloys.

DIN 127BSpring LockVibration

DIN / ISO

DIN 9021 / ISO 7093

Large OD (fender) washers — OD approximately three times the bolt diameter. ISO 7093-1 (large series) and ISO 7093-2 (extra-large). For FRP flanges, rubber-lined equipment, composite panels, and all substrates where the normal DIN 125 OD provides insufficient bearing area and crushing of the substrate surface would occur under bolt preload. M5–M100.

DIN 9021ISO 7093Large OD

ASME / ANSI

ASME B18.21.1

Lock Washers — ASME B18.21.1 covers inch-thread lock washer dimensions (regular, extra heavy, high collar) for ANSI/ASME inch-thread fastener assemblies. Applicable for exotic alloy washers in inch UNC/UNF thread ASME B16.5 stud bolt assemblies where DIN 127 metric dimensions are not suitable. Inch-thread washer sizes available in all exotic alloys on request.

Inch ThreadLock WashersANSI

ASTM International

ASTM F436 / F844

F436 covers hardened steel structural washers (SAE grades). F844 covers USS and SAE flat washers for structural applications. In exotic alloy service, washer material is specified by the ASTM material standard of the alloy (B574 for C276, B164 for Monel 400, etc.) rather than F436 — which covers carbon steel structural washers only.

StructuralCarbon SteelNote

ISO Quality

ISO 9001:2015

QMS — Akbar Fasteners Pvt. Ltd. certified for complete washer manufacture and inspection in all alloys at our Mumbai facility. Same quality system as stud bolt, bolt, and nut production. PMI XRF before machining. Full MTC and COC dispatched with every washer order. ISO certificate on request.

QMSCertifiedMumbai

Every Washer Order Ships With

Complete Documentation Package

MTC

Mill Test Certificate
Heat & Lot Traceable

COC

Certificate of
Conformance

PMI

XRF Material ID
100% Lots Verified

NABL

Accredited Lab Reports
Tensile · Hardness

TPI

Third-Party Inspection
TÜV · BV · Lloyds

Exotic Alloy Washers — Akbar Fasteners Mumbai

Need Exotic Alloy Washers
in Any DIN Standard?

Washer type · alloy · size · quantity · matched stud bolt requirement. Akbar Fasteners Pvt. Ltd. responds within 24 hours with pricing and MTC documentation list.

Email RFQ — sales@akbarfasteners.in +91 724 0000 733 WhatsApp →

Export: +91 8696 32 4646 · Support: +91 800 9315 333 · export@akbarfasteners.in

WashersWeight ChartSize Chart MM KG

All Washer Types & Standards

Plain Flat Washers

Spring Helical Washers

Large OD (Fender) Washers

Tab & Nord-Lock Style

Washer Size Chart & Weight Chart — MM & KG

Washer Weight Formula & Alloy Density Factors

Exotic Alloy Washers — Complete Material Range

Hastelloy C276

Hastelloy B2 / B3

Hastelloy C22

Monel K500

Monel 400

Inconel 625 / 718

Incoloy 825

Nickel 200 / 201

SS 304 / 316L / 904L

Duplex 2205 / 2507

17-4 PH (S17400)

Carbon Steel / A193 B7

Washer Standards Coverage

Complete Documentation Package

Need Exotic Alloy Washersin Any DIN Standard?

Washers
Weight Chart
Size Chart MM KG

Need Exotic Alloy Washers
in Any DIN Standard?