316 SS Hex Cap Screw
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316 SS Hex Cap Screw

316 Stainless Steel hex head cap screws are manufactured from 316 stainless steel, an austenitic alloy which differs from 18-8 by its molybdenum content (2-3%) and a higher nickel content (10-14%). Dimensional specifications are governed by ASME B18.2.1. 316 stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment. 316 stainless steel has a higher corrosion resistance than 18-8 or 304 stainless steel.

Governing Standards316 Stainless Steel

ASME B18.2.1 Covers the complete general and dimensional data for multiple types of inch series square and hex bolts and screws.
ASME B1.1 UNC & UNF Class 2A Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

316 Stainless Steel Head Marking
316 Stainless Steel Material Marking

Dimensional Specifications316 Stainless Steel

Finished bolt and cap screw dimensions
Per ASME B18.2.1-2012
Nominal
Diameter
UNC UNF E F G H J LT Y
Body Diameter Width Across Flats Width Across
Corners
Head Height Wrench
Height
Thread Length Transition
Length
Max Min Basic Max Min Max Min Basic Max Min Min Lengths
up to 6"
Lengths
> 6"
Max
1/4 0.2500 20 28 0.2500 0.2405 7/16 0.4380 0.4280 0.5050 0.4880 5/32 0.1630 0.1500 0.1060 0.7500 1.0000 0.2500
5/16 0.3125 18 24 0.3125 0.3065 1/2 0.5000 0.4890 0.5770 0.5570 13/64 0.2110 0.1950 0.1400 0.8750 1.1250 0.2750
3/8 0.3750 16 24 0.3750 0.3690 9/16 0.5620 0.5510 0.6500 0.6280 15/64 0.2430 0.2260 0.1600 1.0000 1.2500 0.3120
7/16 0.4375 14 20 0.4375 0.4305 5/8 0.6250 0.6120 0.7220 0.6980 9/32 0.2910 0.2720 0.1950 1.1250 1.3750 0.3570
1/2 0.5000 13 20 0.5000 0.4930 3/4 0.7500 0.7360 0.8660 0.8400 5/16 0.3230 0.3020 0.2150 1.2500 1.5000 0.3850
9/16 0.5625 12 18 0.5625 0.5545 13/16 0.8120 0.7980 0.9380 0.9100 23/64 0.3710 0.3480 0.2500 1.3750 1.6250 0.4170
5/8 0.6250 11 18 0.6250 0.6170 15/16 0.9380 0.9220 1.0830 1.0510 25/64 0.4030 0.3780 0.2690 1.5000 1.7500 0.4550
3/4 0.7500 10 16 0.7500 0.7410 1 1/8 1.1250 1.1000 1.2990 1.2540 15/32 0.4830 0.4550 0.3240 1.7500 2.0000 0.5000
7/8 0.8750 9 14 0.8750 0.8660 1 5/16 1.3120 1.2850 1.5160 1.4650 35/64 0.5630 0.5310 0.3780 2.0000 2.2500 0.5560
1 1.0000 8 14 1.0000 0.9900 1 1/2 1.5000 1.4690 1.7320 1.6750 39/64 0.6270 0.5910 0.4160 2.2500 2.5000 0.6250
1 1/8 1.1250 7 12 1.1250 1.1140 1 11/16 1.6880 1.6310 1.9490 1.8590 11/16 0.7180 0.6580 0.4610 2.5000 2.7500 0.7140
1 1/4 1.2500 7 12 1.2500 1.2390 1 7/8 1.8750 1.8120 2.1650 2.0660 25/32 0.8130 0.7490 0.5300 2.7500 3.0000 0.7140
1 3/8 1.3750 6 12 1.3750 1.3630 2 1/16 2.0620 1.9940 2.3820 2.2730 27/32 0.8780 0.8100 0.5690 3.0000 3.2500 0.8330
1 1/2 1.5000 6 12 1.5000 1.4880 2 1/4 2.2500 2.1750 2.5980 2.4800 15/16 0.9740 0.9020 0.6400 3.2500 3.5000 0.8330
  1. All dimensions are in inches.
  2. Usable thread length for Hex Head Cap Screws under 6 1/4" long can be approximated by the equation THREAD LENGTH = (2 X DIAMETER) + 1/4″
316 SS Hex Cap Screw
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Diameter Thread Pitch Length Threading Item # Availability Price Quantity UOM
1/4 20 3/8 Full HHS60250037 3-5 Working Days $0.12239/EA EA
1/4 20 1/2 Full HHS60250050 In Stock $0.11357/EA EA
1/4 20 5/8 Full HHS60250062 In Stock $0.15938/EA EA
1/4 20 3/4 Full HHS60250075 In Stock $0.12464/EA EA
1/4 20 7/8 Full HHS60250087 In Stock $0.16347/EA EA
1/4 20 1 Full HHS60250100 In Stock $0.17323/EA EA
1/4 20 1 1/4 Partial HHS60250125 In Stock $0.16784/EA EA
1/4 20 1 1/4 Full HHS60250125TAP In Stock $0.36821/EA EA
1/4 20 1 1/2 Partial HHS60250150 In Stock $0.24687/EA EA
1/4 20 1 1/2 Full HHS60250150TAP In Stock $0.42591/EA EA
1/4 20 1 3/4 Partial HHS60250175 In Stock $0.26808/EA EA
1/4 20 2 Partial HHS60250200 In Stock $0.32043/EA EA
1/4 20 2 Full HHS60250200TAP In Stock $0.81165/EA EA
1/4 20 2 1/4 Partial HHS60250225 In Stock $0.31823/EA EA
1/4 20 2 1/2 Partial HHS60250250 In Stock $0.55288/EA EA
1/4 20 2 3/4 Partial HHS60250275 In Stock $0.63343/EA EA
1/4 20 3 Partial HHS60250300 In Stock $0.56298/EA EA
1/4 20 3 1/2 Partial HHS60250350 In Stock $0.66293/EA EA
1/4 20 4 Partial HHS60250400 In Stock $0.89595/EA EA
1/4 20 5 Partial HHS60250500 3-5 Working Days $10.06334/EA EA
5/16 18 1/2 Full HHS60310050 In Stock $0.30765/EA EA
5/16 18 3/4 Full HHS60310075 In Stock $0.29003/EA EA
5/16 18 1 Full HHS60310100 In Stock $0.50969/EA EA
5/16 18 1 1/4 Full HHS60310125 In Stock $0.35587/EA EA
5/16 18 1 1/2 Partial HHS60310150 In Stock $0.45575/EA EA
5/16 18 1 1/2 Full HHS60310150TAP In Stock $1.60192/EA EA
5/16 18 1 3/4 Partial HHS60310175 In Stock $0.32038/EA EA
5/16 18 2 Partial HHS60310200 In Stock $0.64786/EA EA
5/16 18 2 Full HHS60310200TAP In Stock $2.16788/EA EA
5/16 18 2 1/4 Partial HHS60310225 In Stock $0.61233/EA EA
5/16 18 2 1/2 Partial HHS60310250 In Stock $0.77473/EA EA
5/16 18 2 3/4 Partial HHS60310275 In Stock $0.68082/EA EA
5/16 18 3 Partial HHS60310300 In Stock $1.45795/EA EA
5/16 18 3 1/4 Partial HHS60310325 In Stock $0.76091/EA EA
5/16 18 3 1/2 Partial HHS60310350 In Stock $1.04489/EA EA
5/16 18 4 Partial HHS60310400 In Stock $1.64197/EA EA
5/16 18 4 3/4 Partial HHS60310475 3-5 Working Days $1.64197/EA EA
5/16 18 5 Partial HHS60310500 In Stock $2.11454/EA EA
5/16 18 6 Partial HHS60310600 3-5 Working Days $2.11454/EA EA
5/16 18 7 Partial HHS60310700 3-5 Working Days $17.90148/EA EA
3/8 16 1/2 Full HHS60370050 In Stock $1.33174/EA EA
3/8 16 5/8 Full HHS60370062 In Stock $0.60288/EA EA
3/8 16 3/4 Full HHS60370075 In Stock $0.40089/EA EA
3/8 16 1 Full HHS60370100 In Stock $0.53438/EA EA
3/8 16 1 1/4 Full HHS60370125 In Stock $0.38701/EA EA
3/8 16 1 1/2 Partial HHS60370150 In Stock $0.66114/EA EA
3/8 16 1 1/2 Full HHS60370150TAP In Stock $0.64411/EA EA
3/8 16 1 3/4 Partial HHS60370175 In Stock $0.69887/EA EA
3/8 16 1 3/4 Full HHS60370175TAP In Stock $0.87919/EA EA
3/8 16 2 Partial HHS60370200 In Stock $0.72026/EA EA
3/8 16 2 Full HHS60370200TAP In Stock $0.89903/EA EA
3/8 16 2 1/4 Partial HHS60370225 In Stock $2.13925/EA EA
3/8 16 2 1/2 Partial HHS60370250 In Stock $0.70296/EA EA
3/8 16 2 3/4 Partial HHS60370275 In Stock $0.93349/EA EA
3/8 16 3 Partial HHS60370300 In Stock $1.08514/EA EA
3/8 16 3 Full HHS60370300TAP In Stock $1.78755/EA EA
3/8 16 3 1/4 Partial HHS60370325 In Stock $1.33442/EA EA
3/8 16 3 1/2 Partial HHS60370350 In Stock $1.2252/EA EA
3/8 16 3 3/4 Partial HHS60370375 In Stock $2.71879/EA EA
3/8 16 4 Partial HHS60370400 In Stock $1.36324/EA EA
3/8 16 4 1/2 Partial HHS60370450 In Stock $1.78526/EA EA
3/8 16 5 Partial HHS60370500 3-5 Working Days $1.75029/EA EA
3/8 16 5 Full HHS60370500TAP In Stock $4.98833/EA EA
3/8 16 5 1/2 Partial HHS60370550 In Stock $2.19035/EA EA
3/8 16 6 Partial HHS60370600 In Stock $2.54967/EA EA
7/16 14 3/4 Full HHS60430075 In Stock $0.72176/EA EA
7/16 14 1 Full HHS60430100 In Stock $0.92548/EA EA
7/16 14 1 1/4 Full HHS60430125 In Stock $1.08264/EA EA
7/16 14 1 1/2 Full HHS60430150 In Stock $1.85998/EA EA
7/16 14 1 3/4 Partial HHS60430175 In Stock $1.25334/EA EA
7/16 14 2 Partial HHS60430200 In Stock $1.17286/EA EA
7/16 14 2 1/2 Partial HHS60430250 In Stock $1.84652/EA EA
7/16 14 2 3/4 Partial HHS60430275 3-5 Working Days $37.42934/EA EA
7/16 14 3 Partial HHS60430300 In Stock $1.59664/EA EA
7/16 14 3 1/2 Partial HHS60430350 3-5 Working Days $3.28401/EA EA
7/16 14 4 Partial HHS60430400 3-5 Working Days $3.28401/EA EA
1/2 13 3/4 Full HHS60500075 In Stock $0.78413/EA EA
1/2 13 1 Full HHS60500100 In Stock $0.92828/EA EA
1/2 13 1 1/4 Full HHS60500125 In Stock $0.92373/EA EA
1/2 13 1 1/2 Full HHS60500150 In Stock $1.12958/EA EA
1/2 13 1 3/4 Full HHS60500175 In Stock $0.93575/EA EA
1/2 13 2 Partial HHS60500200 In Stock $1.4457/EA EA
1/2 13 2 1/4 Partial HHS60500225 In Stock $1.79355/EA EA
1/2 13 2 1/2 Partial HHS60500250 In Stock $1.74249/EA EA
1/2 13 2 3/4 Partial HHS60500275 In Stock $1.49457/EA EA
1/2 13 3 Partial HHS60500300 In Stock $2.0104/EA EA
1/2 13 3 1/4 Partial HHS60500325 In Stock $1.94122/EA EA
1/2 13 3 1/2 Partial HHS60500350 3-5 Working Days $1.88628/EA EA
1/2 13 3 3/4 Partial HHS60500375 In Stock $3.46879/EA EA
1/2 13 4 Partial HHS60500400 In Stock $2.78639/EA EA
1/2 13 4 1/4 Partial HHS60500425 In Stock $4.26255/EA EA
1/2 13 4 1/2 Partial HHS60500450 In Stock $2.61671/EA EA
1/2 13 4 3/4 Partial HHS60500475 3-5 Working Days $6.34344/EA EA
1/2 13 5 Partial HHS60500500 In Stock $3.12997/EA EA
1/2 13 5 1/2 Partial HHS60500550 In Stock $3.94041/EA EA
1/2 13 6 Partial HHS60500600 In Stock $3.12581/EA EA
1/2 13 6 1/2 Partial HHS60500650 3-5 Working Days $6.19221/EA EA
5/8 11 1 Full HHS60620100 In Stock $1.71032/EA EA
5/8 11 1 1/4 Full HHS60620125 In Stock $1.78585/EA EA
5/8 11 1 1/2 Full HHS60620150 In Stock $2.1585/EA EA
5/8 11 1 3/4 Full HHS60620175 In Stock $1.94616/EA EA
5/8 11 2 Full HHS60620200 In Stock $2.25353/EA EA
5/8 11 2 1/4 Partial HHS60620225 In Stock $2.7439/EA EA
5/8 11 2 1/2 Partial HHS60620250 In Stock $2.57142/EA EA
5/8 11 2 3/4 Partial HHS60620275 In Stock $2.84441/EA EA
5/8 11 3 Partial HHS60620300 In Stock $2.87779/EA EA
5/8 11 3 1/4 Partial HHS60620325 In Stock $3.6257/EA EA
5/8 11 3 1/2 Partial HHS60620350 In Stock $3.71878/EA EA
5/8 11 3 3/4 Partial HHS60620375 In Stock $4.74983/EA EA
5/8 11 4 Partial HHS60620400 In Stock $7.07855/EA EA
5/8 11 4 1/4 Partial HHS60620425 3-5 Working Days $4.0865/EA EA
5/8 11 4 1/2 Partial HHS60620450 In Stock $4.05144/EA EA
5/8 11 5 Partial HHS60620500 In Stock $4.1378/EA EA
5/8 11 5 1/2 Partial HHS60620550 In Stock $4.86635/EA EA
5/8 11 6 Partial HHS60620600 In Stock $7.15422/EA EA
3/4 10 1 Full HHS60750100 In Stock $2.42928/EA EA
3/4 10 1 1/4 Full HHS60750125 In Stock $3.09667/EA EA
3/4 10 1 1/2 Full HHS60750150 In Stock $3.96007/EA EA
3/4 10 1 3/4 Full HHS60750175 In Stock $2.76672/EA EA
3/4 10 2 Full HHS60750200 In Stock $2.81354/EA EA
3/4 10 2 1/4 Full HHS60750225 In Stock $4.10819/EA EA
3/4 10 2 1/2 Full HHS60750250 In Stock $3.29963/EA EA
3/4 10 2 3/4 Partial HHS60750275 In Stock $3.51617/EA EA
3/4 10 3 Partial HHS60750300 In Stock $3.73005/EA EA
3/4 10 3 1/4 Partial HHS60750325 In Stock $3.73115/EA EA
3/4 10 3 1/2 Partial HHS60750350 In Stock $4.07654/EA EA
3/4 10 3 3/4 Partial HHS60750375 In Stock $5.58403/EA EA
3/4 10 4 Partial HHS60750400 In Stock $5.08087/EA EA
3/4 10 4 1/4 Partial HHS60750425 In Stock $4.80865/EA EA
3/4 10 4 1/2 Partial HHS60750450 In Stock $4.99168/EA EA
3/4 10 5 Partial HHS60750500 In Stock $11.91348/EA EA
3/4 10 5 1/2 Partial HHS60750550 In Stock $15.6406/EA EA
3/4 10 6 Partial HHS60750600 In Stock $16.30616/EA EA
7/8 9 1 1/2 Full HHS60870150 3-5 Working Days $5.20854/EA EA
7/8 9 1 3/4 Full HHS60870175 3-5 Working Days $5.28348/EA EA
7/8 9 2 Full HHS60870200 In Stock $5.91137/EA EA
7/8 9 2 1/4 Full HHS60870225 In Stock $6.87602/EA EA
7/8 9 2 1/2 Full HHS60870250 In Stock $5.37634/EA EA
7/8 9 2 3/4 Full HHS60870275 In Stock $5.89769/EA EA
7/8 9 3 Partial HHS60870300 In Stock $5.87625/EA EA
7/8 9 3 1/2 Partial HHS60870350 In Stock $6.22353/EA EA
7/8 9 3 3/4 Partial HHS60870375 3-5 Working Days $7.99479/EA EA
7/8 9 4 Partial HHS60870400 In Stock $7.77299/EA EA
7/8 9 4 1/2 Partial HHS60870450 In Stock $8.18296/EA EA
7/8 9 5 Partial HHS60870500 In Stock $9.97067/EA EA
7/8 9 5 1/2 Partial HHS60870550 3-5 Working Days $13.90867/EA EA
7/8 9 6 Partial HHS60870600 3-5 Working Days $12.87064/EA EA
1 8 2 Full HHS61000200 In Stock $7.33886/EA EA
1 8 2 1/2 Full HHS61000250 In Stock $6.55073/EA EA
1 8 3 Full HHS61000300 In Stock $7.80801/EA EA
1 8 3 1/2 Partial HHS61000350 In Stock $14.03957/EA EA
1 8 3 3/4 Partial HHS61000375 3-5 Working Days $14.03957/EA EA
1 8 4 Partial HHS61000400 In Stock $9.34847/EA EA
1 8 4 1/4 Partial HHS61000425 3-5 Working Days $9.08318/EA EA
1 8 4 1/2 Partial HHS61000450 In Stock $10.08213/EA EA
1 8 4 3/4 Partial HHS61000475 In Stock $12.76324/EA EA
1 8 5 Partial HHS61000500 In Stock $10.41832/EA EA
1 8 5 1/2 Partial HHS61000550 In Stock $15.15635/EA EA
1 8 6 Partial HHS61000600 In Stock $11.81876/EA EA