Square Head Nut is a four-sided nut. As compared to standard hex nuts, square nuts provide greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. In order to avoid damage from its sharp edges and increase the strength of the fastener it is used along with flat washers. The most significant advantage of using Square Weld Nut is that it can be welded into even imperfect and irregular surfaces without losing their balance. It is also known as square projection weld nuts. Its dimension are defined in both metric and imperials sizes with UNC, UNF, UN and ISO metric. Stainless Steel Square Nut is typically mated with square-headed bolts. It is commonly used in furniture as a blind nut, it is also used in rail channels in order to prevent turning of rail when pressure is applied. It is also used as a perfect foundation in metal channels for hidden fasteners. Metric Square Nut is commonly referenced using 'M' sizes, for example M3, M8, and M12. But the size of a metric square nut is more accurately identified by using diameter, pitch and length dimensions, in millimeters. Its size dimensions used are simply diameter and pitch. Flat square nut is a simple nut stamped from sheet metal in square shape. It is a simply a nut that is stamped from sheet metal. It can be considered a type of speed nut, providing the functions of a nut and a sprung washer in a single element. It also has a degree of friction locking and they are extremely low profile.
Stainless Steel Square Nut
M6 Square Nut
Square Weld Nut
DIN Standard of Square Nut | DIN 934, DIN 982, DIN 985, DIN 936, DIN 929, DIN 1587, DIN 439, DIN 315 |
British standards of Square Nut | BS 57 |
Square Nut Size Metric |
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Square Nut Size Inch |
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Standard | IS, ANSI, ASTM, DIN, ISO, JIS, GB, ASME, BS, UNI, CSN, EU, IFI, PN, and all International Standards
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Stainless Steel Square Nut Size |
Manufacturing M2, M3, M3.5, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M42, M45, M48 to M160 and Custom Metric Stainless Steel Square Nut |
SS Square Nut British standards |
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Length | 3 mm to 200 mm |
Stainless Steel Square Nut US Threads | METRIC, BSW, BSF, UNK threads, UNR threads, Unified national coarse (UNC), Unified national fine (UNF), Unified national extra fine (UNEF), UNJC and UNJF threads, Constant-pitch threads |
UTS - Unified Thread Standard | UNC, UNF, NPT, UNS, UNEF, NPTF Square Nut manufacturers in India |
SS Square Nut Dimensions | ASME B 18.2.2 |
Metric Square Nut Tolerances | +/-0.01mm to +/-0.05mm |
Material Origin | Stainless Steel Square Nut are Western European. Eastern origin possible on request. |
Head drive | Phillips/Slot, Phillips, Slotted, Six-Lobe, etc |
Finish/ Passivation of Stainless Steel Square Nut | Accordance to ASTM A380/A380M |
Square Nut Surface Finish | Zinc (yellow, blue, white, black), black oxide, Dacroment, anodizing, plated zinc-nickel, nickel plated, Geometry, Stainless steel: Passivated, Self-Colour, Hot Dip Galvanised (HDG), Sherardized, Bright Zinc Plated (BZP), Mechanically Applied coating and some special one like DACROMET |
Stainless Steel Square Nut Manufacturing process |
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Stainless Steel Square Nut Surface Coating |
All Square Nut surface finishes can be supplied including Galvanised, Zinc, Sherardized, Dacromet, Electroless Nickel, Geomet & PTFE. |
Other Top Stainless Steel Square Nut Manufacturers | Omni, APL, Unbrako, Kundan, Deepak Fasteners, Sundaram Precision, Infasco, Caparo, EBY Fastener, SPAX® Screws, GKW Etc. |
Square Nut Surface treatment |
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MOQ | 5 pieces |
Stainless Steel Square Nut marking and Packing |
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Free Samples | Yes |
Port of Dispatch | Mumbai or Kalamboli ports in Maharashtra state of India |
Why Jignesh Steel? |
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Preferred Square Nut Drawing Formats | JPEG, PDF, CAD, STP, IGS |
Payment Terms | T/T, Western Union, Paypal, L/C or Trade Assurance 30% deposit & balance before shipping |
Test Certificates provided by Stainless Steel Square Nut manufacturers |
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Delivery time | Regular product is about 7-15 days, custom product will according to special requirement |
Common Square Nut material grades |
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Square Nut Application and Uses | Industrial, Wind tower, Railway, Nuclear power, Construction, Electronic, and Automotive indutries, these end users prefer to buy from Stainless Steel Square Nut manufacturers in India |
ISO - International Organization for Standardization |
Products | FOB Price US $ |
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Stainless steel zinc plate DIN standard square nylock nut | US $0.002-0.01 / Piece |
316 304 Stainless Steel square nut | US $0.023-0.056 / Piece |
Taiwan quality Aluminum Stainless Steel Self Color DIN 928 Square Weld Nuts | US $0.02-0.3 / Piece |
Stainless Steel 304 Butterfly Square Wing Nut | US $0.03-0.05 / Pieces |
DIN 928 m6 Stainless Steel high quality Square/round weld nut | US $0.0025-0.01 / Piece |
Din928 Stainless Steel Square Weld Nut | US $0.01-0.06 / Piece |
M4-M12 stainless steel 304 square cage nut | US $0.01-0.05 / Pieces |
High quality A2 stainless steel square nut/square thread bolt and nut | US $0.01-0.35 / Piece |
din562 din798 din557 m2 m3 m4 m7 m8 m6 m5 stainless steel thin square nut | US $0.01-1 / Piece |
DIN928 304 316 stainless steel square weld nuts | US $0.01-2 / Piece |
Professional Production Stainless Steel 304 M3 Square Weld Nut | US $0.1-0.2 / Piece |
stainless steel square nut M20 | US $0.01-1 / Piece |
Competitive price Stainless Steel square Floating Nut | US $0.01-0.05 / Piece |
m6 stainless steel square lock cage nut | US $0.02-1 / Piece |
M3 M3.5 M4 stainless steel A194 heavy square nut (ASTM ansi) | US $0.015-0.25 / Piece |
304 stainless steel square threaded nut | US $0.01-0.5 / Piece |
Serrated Stainless Steel Acorn Nut Din1587 | US $0.001-10 / Piece |
Call us or send us an email to sales@jigneshsteel.com for more details.
Square Head Nut
Metric Square Nut
M3 Square Nut
Flat Square Nut
316 SS Square Nut
SS 304 Square Nut
Machine Square Nut Dimensions | ||||
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Nut Size |
Nom. Diameter |
Width | Thickness | |
Across Flats |
Across Corners |
Nom. | ||
#0 | 0.0600 | 5/32 | 7/32 | 3/64 |
#1 | 0.0730 | 5/32 | 7/32 | 3/64 |
#2 | 0.0860 | 3/16 | 1/4 | 1/16 |
#3 | 0.0990 | 3/16 | 1/4 | 1/16 |
#4 | 0.1120 | 1/4 | 11/32 | 3/32 |
#5 | 0.1250 | 5/16 | 27/64 | 7/64 |
#6 | 0.1380 | 5/16 | 27/64 | 7/64 |
#8 | 0.1640 | 11/32 | 15/32 | 1/8 |
#10 | 0.1900 | 3/8 | 33/64 | 1/8 |
#12 | 0.2160 | 7/16 | 19/32 | 5/32 |
1/4 | 0.2500 | 7/16 | 19/32 | 3/16 |
5/16 | 0.3125 | 9/16 | 49/64 | 7/32 |
3/8 | 0.3750 | 5/8 | 55/64 | 1/4 |
Square Nut Grade Identification Marking |
Square Nut Specification | Square Nut Material | Nominal Size ub Inches | Square Nut Proof Load Stress ksi |
Hardness Rockwell |
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Min | Max | |||||
![]() No Mark |
ASTM A563 - Grade 0 |
Carbon Steel |
1/4 thru 1-1/2 |
69 | B55 | C32 |
ASTM A563 - Grade A |
Carbon Steel |
1/4 thru 1-1/2 |
90 | B68 | C32 | |
ASTM A563 - Grade B | Carbon Steel | 1/4 thru 1 | 120 | B69 | C32 | |
over 1 thru 1-1/2 |
105 | |||||
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ASTM A563 - Grade C |
Carbon Steel May be Quenched and Tampered |
1/4 thru 4 | 144 | B78 | C38 |
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ASTM A563 - Grade C3 |
Atmospheric Corrosion Resistant Steel May be Quenched and Tampered |
1/4 thru 4 | 144 | B78 | C38 |
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ASTM A563 - Grade D |
Carbon Steel May be Quenched and Tampered |
1/4 thru 4 | 150 | B84 | C38 |
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ASTM A563 - Grade DH |
Carbon Steel Quenched and Tampered |
1/4 thru 4 | 175 | C24 | C38 |
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ASTM A563 - Grade DH3 |
Atmospheric Corrosion Resistant Steel,Quenched and Tampered |
1/4 thru 4 | 175 | C24 | C38 |
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ASTM A194 - Grade 1 |
Carbon Steel |
1/4 thru 4 | 130 | B70 | - |
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ASTM A194 - Grade 2 |
Medium Carbon Steel |
1/4 thru 4 | 150 | 159 | 352 |
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ASTM A194 - Grade 2H |
Medium Carbon Steel, Quenched and Tempered |
1/4 thru 4 | 175 | C24 | C38 |
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ASTM A194 - Grade 2HM |
Medium Carbon Steel, Quenched and Tempered |
1/4 thru 4 | 150 | 159 | 237 |
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ASTM A194 - Grade 4 |
Medium Carbon Alloy Steel, Quenched and Tempered |
1/4 thru 4 | 175 | C24 | C38 |
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ASTM A194 - Grade 7 |
Medium Carbon Alloy Steel,Quenched and Tempered |
1/4 thru 4 | 175 | C24 | C38 |
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ASTM A194 - Grade 7M |
Medium Carbon Alloy Steel, Quenched and Tempered |
1/4 thru 4 | 150 | 159 | 237 |
Size | Diameter* | Height | ||||
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Hex Nut | Machine Screw Nut | Hex Nut | Jam Nut | Nylock Nut | Machine Screw Nut | |
#0 | - | 5/32" | - | - | - | 3/64" |
#1 | - | 5/32" | - | - | - | 3/64" |
#2 | - | 3/16" | - | - | 9/64" | 1/16" |
#3 | - | 3/16" | - | - | 9/64" | 1/16" |
#4 | - | 1/4" | - | - | 9/64" | 3/32" |
#6 | - | 5/16" | - | - | 11/64" | 7/64" |
#8 | - | 11/32" | - | - | 15/64" | 1/8" |
#10 | - | 3/8" | - | - | 15/64" | 1/8" |
#12 | - | 7/16" | - | - | 5/16" | 5/32" |
1/4" | 7/16" | 7/16" | 7/32" | 5/32" | 5/16" | 3/16" |
5/16" | 1/2" | 9/16" | 17/64" | 3/16" | 11/32" | 7/32" |
3/8" | 9/16" | 5/8" | 21/64" | 7/32" | 29/64" | 1/4" |
7/16" | 11/16" | - | 3/8" | 1/4" | 29/64" | - |
1/2" | 3/4" | - | 7/16" | 5/16" | 19/32" | - |
9/16" | 7/8" | - | 31/64" | 5/16" | 41/64" | - |
5/8" | 15/16" | - | 35/64" | 3/8" | 3/4" | - |
3/4" | 1-1/8" | - | 41/64" | 27/64" | 7/8" | - |
7/8" | 1-5/16" | - | 3/4" | 31/64" | 63/64" | - |
1" | 1-1/2" | - | 55/64" | 35/64" | 1-3/64" | - |
* This is the diameter across the flats. It is also the size of wrench to use. |
Square Nut Nominal Diameter Thread Pitch |
Width Flats, S |
Width Corners E |
Property Classes 5 and 10 Square Nut | Property Class 9 Square Nut | Property Class | Bearing Face Diameter Dw |
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Metala Type |
Top Insert |
All Metal |
Top Insert |
5 & 10 Square Nut |
9 Square Nut | ||||||||||
Thickness, M | Wrenching Height, M1 | ||||||||||||||
Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Min | Min | Min | |
M3 × 0.5 | 5.50 | 5.32 | 6.35 | 6.01 | 3.10 | 2.65 | 4.50 | 3.90 | 3.10 | 2.65 | 4.50 | 3.90 | 1.4 | 1.4 | 4.6 |
M3.5 × 0.6 | 6.00 | 5.82 | 6.93 | 6.58 | 3.50 | 3.00 | 5.00 | 4.30 | 3.50 | 3.00 | 5.00 | 4.30 | 1.7 | 1.7 | 5.1 |
M4 × 0.7 | 7.00 | 6.78 | 8.08 | 7.66 | 4.00 | 3.50 | 6.00 | 5.30 | 4.00 | 3.50 | 6.00 | 5.30 | 1.9 | 1.9 | 5.9 |
M5 × 0.8 | 8.00 | 7.78 | 9.24 | 8.79 | 5.30 | 4.80 | 6.80 | 6.00 | 5.30 | 4.80 | 7.20 | 6.40 | 2.7 | 2.7 | 6.9 |
M6 × 1 | 10.00 | 9.78 | 11.55 | 11.05 | 5.90 | 5.40 | 8.00 | 7.20 | 6.70 | 5.40 | 8.50 | 7.70 | 3.0 | 3.0 | 8.9 |
M8 × 1.25 | 13.00 | 12.73 | 15.01 | 14.38 | 7.10 | 6.44 | 9.50 | 8.50 | 8.00 | 7.14 | 10.20 | 9.20 | 3.7 | 4.3 | 11.6 |
bM10 × 1.5 | 15.00 | 14.73 | 17.32 | 16.64 | 9.70 | 8.70 | 12.50 | 11.50 | 11.20 | 9.60 | 13.50 | 12.50 | 5.6 | 6.2 | 13.6 |
M10 × 1.5 | 16.00 | 15.73 | 18.48 | 17.77 | 9.00 | 8.04 | 11.90 | 10.90 | 10.50 | 8.94 | 12.80 | 11.80 | 4.8 | 5.6 | 14.6 |
M12 × 1.75 | 18.00 | 17.73 | 20.78 | 20.03 | 11.60 | 10.37 | 14.90 | 13.90 | 13.30 | 11.57 | 16.10 | 15.10 | 6.7 | 7.7 | 16.6 |
M14 × 2 | 21.00 | 20.67 | 24.25 | 23.35 | 13.20 | 12.10 | 17.00 | 15.80 | 15.40 | 13.40 | 18.30 | 17.10 | 7.8 | 8.9 | 19.6 |
M16 × 2 | 24.00 | 23.67 | 27.71 | 26.75 | 15.20 | 14.10 | 19.10 | 17.90 | 17.90 | 15.70 | 20.70 | 19.50 | 9.1 | 10.5 | 22.5 |
M20 × 2.5 | 30.00 | 29.16 | 34.64 | 32.95 | 19.00 | 16.90 | 22.80 | 21.50 | 21.80 | 19.00 | 25.10 | 23.80 | 10.9 | 12.7 | 27.7 |
M24 × 3 | 36.00 | 35.00 | 41.57 | 39.55 | 23.00 | 20.20 | 27.10 | 25.60 | 26.40 | 22.60 | 29.50 | 28.00 | 13.0 | 15.1 | 33.2 |
M30 × 3.5 | 46.00 | 45.00 | 53.12 | 50.85 | 26.90 | 24.30 | 32.60 | 30.60 | 31.80 | 27.30 | 35.60 | 33.60 | 15.7 | 18.2 | 42.7 |
M36 × 4 | 55.00 | 53.80 | 63.51 | 60.79 | 32.50 | 29.40 | 38.90 | 36.90 | 38.50 | 33.10 | 42.60 | 40.60 | 19.0 | 22.1 | 51.1 |
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