High Strength Black Oxide ASTM A194 2h Hex Heavy Structural
Nuts STYLEANSI ASME ASTM Heavy Hex NutsHex Heavy
Structural Nuts STANDARDASTM A194
2HSUPPLIERQBHSHOPqbfastener.en.made-in-china.comSIZE1/2"~4"CLASS(Carbon
steel)2,2H,2HM,4,7,7MCoating(Carbon steel)black, zinc, HDG, Heat
treatment, Dacromet, GEOMET , CustomizedMATERIALCarbon
steelPACKINGbulk/ boxes in cartons, bulk in polybags/ buckets,
etc.PALLETsolid wood pallet, plywood pallet, ton box/bag,
etc.Product DescriptionChoose these nuts for their good corrosion
resistance and adherence to Strict-military Standardsfor material
and construction. ASTM
A194-2HMA194-2HA194-4A194-7A194-7M Heavy Hex Nuts with Carbon and
Alloy SteelTeflon Black/Zinc/H.D.G 1/2~4inch. QBH company
will according Standard Specification for Carbon and Alloy Steel
Nuts for Bolts forHigh Pressure or High Temperature Service, or
Both.This standard is issued under the fixed designation
A194/A194M; the number immediately followingthe designation
indicates the year of original adoption or, in the case of
revision, the year of lastrevision. A number in parentheses
indicates the year of last reapproval.A superscript epsilon
indicates an editorial change since the last revision or
reapproval.This standard has been approved for use by agencies of
the Department of Defense. QBH HEAVY HEX NUTS
UNIT:MMSIZEFHCKG/MPCS1/412.4--12.75.54--6.3514.12--14.665.225/1613.87--14.277.11--7.9815.8--16.517.83/816.99--17.478.66--9.5819.38--20.1714.257/1618.49--19.0510.24--11.221.08--2218.881/221.59--22.2311.79--12.824.61--25.65309/1623.09--23.8313.36--14.4326.34--27.51375/826.19--26.9714.91--16.0329.84--31.17543/430.78--31.7518.03--19.2535.1--36.65887/8--935.41--36.5321.16--22.4840.36--42.161351--840.01--41.2824.28--25.745.61--47.651931-1/8-746.02-44.628.93-27.453.16-51.492691-1/4-750.8-49.2231.77-30.1458.64-56.833481-3/8-655.57-53.8235-33.2764.16-62.144631-1/2-660.32-58.4238.22-36.3969.64-67.465951-5/8-565.07-63.0141.45-39.5275.15-72.757421-7/8-574.62-72.2347.9-45.7786.15-83.410901-3/4-569.85-67.6144.67-42.648.64-78.069262-4.579.37-76.8351.13-48.8991.64-88.7113572-1/4-4.588-86.0557.17-54.73102.64-99.3618792-1/2-498.42-95.2563.62-60.98113.63-109.9825552-3/4-4107.95-104.4470.07-67.23124.63-120.5933793-4117.47-113.6676.53-73.48135.63-131.244315
Process Flow Cold ForgingAnnealing treatment (if need)
-> wiredrawing -> clod forging -> tapping
-> make heat treatment (if
need) -> Finish -> Packing Hot
ForgingCutting material -> hot
forging -> turning -> tapping -> make
heat treatment(if
need) -> Finish -> Packing Product
Grade A194-2 , A194-2HM , A194-2H , A194-4 , A194-7 , A194-7M
, A194-7LA194 Grades2QBHASTM A194 Series Carbon Steel Heavy
Hex Nuts2HQuenched & tempered carbon steel heavy hex
nuts2HMQuenched & tempered carbon steel heavy hex nuts, 100%
hardness tested4Quenched & tempered carbon-molybdenum heavy hex
nuts (withdrawn in 2017)7Quenched & tempered alloy steel heavy hex
nuts7MQuenched & tempered alloy steel heavy hex nuts, 100% hardness
tested7LQuenched & tempered alloy steel heavy hex nuts, Charpy
impact tested8Stainless AISI 304 heavy hex nuts8MStainless AISI 316
heavy hex nutsMore DetailsQBH Materials and Chemical
Compstition 1045CHEMICAL COMPOSI
%CSiMnPSCrNiCu0.450.230.580.0140.0060.0570.0080.016 42CRMOCHEMICAL
COMPOSI
%CSiMnPSCrNiCuMo0.420.270.920.0130.0041.010.030.040.2 QBH A194
Chemical PropertiesElement2, 2H, and 2HM47 and 7M (AISI 4140)8
(AISI 304)8M (AISI 316)Carbon0.40% min0.40 - 0.50%0.37 - 0.49%0.08%
max0.08% maxManganese1.00% max0.70 - 0.90%0.65 - 1.10%2.00%
max2.00% maxPhosphorus, max0.040%0.035%0.035%0.045%0.045%Sulfur,
max0.050%0.040%0.040%0.030%0.030%Silicon0.40% max0.15 - 0.35%0.15 -
0.35%1.00% max1.00% maxChromium 0.75 - 1.20%18.0 -
20.0%16.0 - 18.0%Nickel 8.0 - 11.0%10.0 -
14.0%Molybdenum 0.20 - 0.30%0.15 - 0.25% 2.00 -
3.00% QBH A194 Mechanical
PropertiesSpecificationMaterialNominal Size, In.Tempering Temp.
°FProof Load Stress, ksiHardness RockwellSee NoteMinMaxASTM A194
Grade 2Medium Carbon Steel1/4 - 401501593521,2,3ASTM A194 Grade
2HMedium Carbon Steel, Quenched and Tempered1/4 -
4850175C24C381,2ASTM A194 Grade 2HMMedium Carbon Steel, Quenched
and Tempered1/4 - 411501501592371,2,3ASTM A194 Grade 4Medium Carbon
Alloy Steel, Quenched and Tempered1/4 -
41100175C24C381,2Supplier/BrandQBHShophttps://qbfastener.en.made-in-china.com/ASTM
A194 Grade 7Medium Carbon Alloy Steel, Quenched and Tempered1/4 -
41100175C24C381,2ASTM A194 Grade 7MMedium Carbon Alloy Steel,
Quenched and Tempered1/4 - 411501501592371,2,3ASTM A194 Grade
8Stainless AISI 3041/4 - 4-801263004ASTM A194 Grade 8MStainless
AISI 3161/4 - 4-801263004 NOTES:The markings shown for all
grades of A194 nuts are for cold formed and hot forged nuts. When
nutsare machined from bar stock, the nut must additionally be
marked with the letter 'B'. The letters Hand M indicate heat
treated nuts.Properties shown are those of coarse and 8-pitch
thread heavy hex nuts.Hardness numbers are Brinell Hardness.Nuts
that are c
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