Hex Bolts & Cap Screws

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Expected delivery: Wed, Nov 18

Hex bolts and hex cap screws are the workhorse fasteners for machinery, structural brackets, truck bodies and equipment repair. This section covers inch sizes in UNC and UNF threads and metric sizes in class 8.8 and 10.9, with partial or full threads. Materials include Grade 2, Grade 5 and Grade 8 steel plus 18-8 and 316 stainless, in plain, zinc, yellow zinc and hot-dip galvanized finishes.

What to check before you order

Grade or property class. Match the grade to the load. Grade 5 covers most equipment work, and Grade 8 is for high-stress joints such as suspension and heavy machinery. The hex bolt grades guide shows head markings.
Thread pitch. A 1/2" bolt comes in 1/2"-13 coarse and 1/2"-20 fine. They will not interchange, so confirm the nut or tapped hole first.
Length and thread length. Measure from under the head. Longer bolts are often partially threaded, which leaves a smooth shank in the shear plane.
Finish. Hot-dip galvanized bolts need galvanized nuts, because the coating adds thickness to the threads.

Common questions

Is a Grade 8 bolt always the safer choice?

Not always. Grade 8 is stronger but less ductile than Grade 5. Use the grade the equipment maker or engineer specifies.

Pair your bolts with matching nuts and washers, or browse all fasteners.

Hex Bolts & Cap Screws: page 39

Approved Vendor M16-2.0x110 A4-70 Stainless Steel Hex Cap Screws SKU 6064 $16.40
Approved Vendor M16-2.0x110 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27269 $9.01
Approved Vendor M16-2.0x120 A4-70 Stainless Steel Hex Cap Screws SKU 6065 $17.64
Approved Vendor M16-2.0x120 Class 10.9 Hex Cap Screws Zinc Clear SKU 27369 $7.21
Approved Vendor M16-2.0x120 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27250 $9.96
Approved Vendor M16-2.0x140 Class 8.8 Hex Cap Screws Zinc Clear SKU 28917 $8.95
Approved Vendor M16-2.0x35 A4-70 Stainless Steel Hex Cap Screws SKU 6053 $7.31
Approved Vendor M16-2.0x40 A4-70 Stainless Steel Hex Cap Screws SKU 6054 $7.71
Approved Vendor M16-2.0x40 Class 10.9 Hex Flange Bolts Zinc Clear SKU 28895 $4.90
Approved Vendor M16-2.0x45 A4-70 Stainless Steel Hex Cap Screws SKU 6055 $8.58
Approved Vendor M16-2.0x45 Class 8.8 Hex Flange Bolts Plain & Oil SKU 28898 $3.85
Approved Vendor M16-2.0x45 Class 8.8 Hex Flange Bolts Zinc Clear SKU 28896 $4.98
Approved Vendor M16-2.0x45 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 28897 $5.48
Approved Vendor M16-2.0x50 A4-70 Stainless Steel Hex Cap Screws SKU 6056 $9.07
Approved Vendor M16-2.0x50 Class 10.9 Hex Cap Screws Zinc Clear SKU 27370 $3.10
Approved Vendor M16-2.0x50 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27467 $4.67
Approved Vendor M16-2.0x60 A4-70 Stainless Steel Hex Cap Screws SKU 6057 $10.26
Approved Vendor M16-2.0x60 Class 10.9 Hex Cap Screws Zinc Clear SKU 27319 $4.87
Approved Vendor M16-2.0x65 A4-70 Stainless Steel Hex Cap Screws SKU 6058 $10.92
Approved Vendor M16-2.0x70 A4-70 Stainless Steel Hex Cap Screws SKU 6059 $11.41
Approved Vendor M16-2.0x70 Class 10.9 Hex Flange Bolts Zinc Clear SKU 27421 $6.85
Approved Vendor M16-2.0x75 A4-70 Stainless Steel Hex Cap Screws SKU 6060 $12.03
Approved Vendor M16-2.0x80 A4-70 Stainless Steel Hex Cap Screws SKU 6061 $12.64
Approved Vendor M16-2.0x90 A4-70 Stainless Steel Hex Cap Screws SKU 6062 $14.14
Approved Vendor M18-1.50x50 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27316 $7.09
Approved Vendor M18-1.50x60 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27212 $8.17
Approved Vendor M20-2.5x50 Class 8.8 Hex Cap Screws Zinc Clear SKU 27282 $4.21
Approved Vendor M20-2.5x60 Class 8.8 Hex Cap Screws Zinc Clear SKU 28914 $9.65
Approved Vendor M20-2.5x70 Class 8.8 Hex Cap Screws Zinc Clear SKU 28913 $8.40
Approved Vendor M4-.7x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 27496 $0.15
Approved Vendor M5-.8x12 Class 8.8 Hex Cap Screws Zinc Clear SKU 26994 $0.12
Approved Vendor M5-.8x16 Class 8.8 Hex Cap Screws Zinc Clear SKU 27042 $0.14
Approved Vendor M5-.8x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 26902 $0.17
Approved Vendor M5-.8x25 Class 8.8 Hex Cap Screws Zinc Clear SKU 27216 $0.19
Approved Vendor M5-0.80x55 Class 8.8 Hex Cap Screws Zinc Clear SKU 28930 $0.63
Approved Vendor M5-0.8x10 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27094 $0.18
Approved Vendor M5-0.8x12 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27119 $0.19
Approved Vendor M5-0.8x12 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32429 $1.00
Approved Vendor M5-0.8x16 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26987 $0.20
Approved Vendor M5-0.8x20 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27038 $0.21
Approved Vendor M6-1.00x12 Class 10.9 Hex Cap Screws Zinc Clear SKU 26849 $0.12
Approved Vendor M6-1.00x12 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27072 $0.23
Approved Vendor M6-1.00x16 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27039 $0.26
Approved Vendor M6-1.00x18 Class 8.8 Hex Cap Screws Zinc Clear SKU 27406 $0.29
Approved Vendor M6-1.00x20 Class 10.9 Hex Cap Screws Zinc Yellow SKU 26988 $0.29
Approved Vendor M6-1.00x25 Class 10.9 Hex Cap Screws Zinc Yellow SKU 26952 $0.32
Approved Vendor M6-1.00x30 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27298 $0.38
Approved Vendor M6-1.00x30 Class 8.8 Full Thread Hex Cap Screws Zinc Clear SKU 27255 $0.30

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