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ASTM F880M - Standard Specification for Stainless Steel Socket Set Screws.

This specification covers chemical, mechanical requirements for austenitic grade stainless steel socket set screws (SSS) for imperial sizes between 0.060 through 0.500 inch in two alloy condition, AF and CW. ASTM F880M is a metric companion to this specification cover the same products in metric size from M1.6 to M12. These stainless steel socket set screws are intended for use in applications where general corrosion resistance is required. BoltPort manufactures Socket Set Screws as per ASTM F880 under grades 303, 304, 304L, 316 and 316L primarily. All products are duly tested for chemical, mechanical requirements, threads and dimensions and supplied with EN 10204 Type 3.1 Certification.

ASTM F880M Chemical Requirements

Composition, & maximum except as shown
UNS Designation Alloy Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Copper Molybdenum
Austenitic Alloys
S30300 303A 0.15 2.00 0.2 0.15 min 1 17.0 - 19.0 8.0 - 10.0 -- 0.60 maxA
S30323 303se 0.15 2.00 0.2 0.06 1 17.0 - 19.0 8.0 - 10.0 -- Se 0.15 min
S30400 304 0.08 2.00 0.045 0.03 1 18.0 - 20.0 8.0 - 10.5 1.00 --
A30403 304L 0.03 2.00 0.045 0.030 1 18.0 - 20.0 8.0 - 12.0 1.00 --
S30500 305 0.12 2.00 0.045 0.03 1 17.0 - 19.0 10.5 - 13.0 1.00 --
S38400 384 0.08 2.00 0.045 0.030 1 15.0 - 17.0 17.0 - 19.0 -- --
S20300 XM1A 0.08 5.00 to 6.50 0.400 0.18 to 0.35 1 16.0 - 18.0 5.0 - 6.5 1.75 - 2.25 0.50 maxA
S30430 18-9LW 0.10 2.00 0.045 0.030 1 17.0 - 19.0 8.0 - 10.0 3.0 - 4.0 --
S30433 302HQ 0.03 2.00 0.045 0.030 1 17.0 - 19.0 8.0 - 10.0 3.0 - 4.0 --
S31600 316 0.08 2.00 0.045 0.030 1 16.0 - 18.0 10.0 - 14.0 -- 2.0 - 3.0
S31603 316 L 0.03 2.00 0.045 0.030 1 16.0 - 18.0 10.0 - 14.0 -- 2.0 - 3.0

A At the manufacturer's option, determined only when intentionally added.

ASTM F880M Torsional Strength Requirements

Nominal Screw Size Shortest Nominal Screw Lengths Subject to Torque Test Torque, in-lb, min
Cup and Flat Points, mm Cone and Oval Points Half Dog Points, mm AF CW
0 0.060 0.109 0.125 0.109 0.3 0.6
1 0.073 0.125 0.141 0.125 0.7 1.2
2 0.086 0.125 0.141 0.141 0.7 1.2
3 0.099 0.141 0.156 0.156 1.6 3.3
4 0.112 0.141 0.172 0.156 1.6 3.3
5 0.125 0.188 0.188 0.172 3 5
6 0.138 0.172 0.203 0.188 3 5
8 0.164 0.188 0.219 0.203 9 16
10 0.190 0.188 0.25 0.234 16 26
1/4" 0.250 0.250 0.312 0.297 40 67
5/16" 0.312 0.312 0.391 0.359 79 135
3/8" 0.375 0.375 0.438 0.438 135 237
7/16" 0.437 0.438 0.547 0.484 220 378
1/2" 0.5 0.5 0.609 0.547 358 600