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MS35275 screw — fillister, drilled

MS35275: drilled fillister head, slotted machine screw in passivated corrosion-resisting steel, UNC-2A, No. 2 to 3/8. Dimensions and every dash number.

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MS35275 at a glance

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MS35275 engineering drawing with dimensions
Engineering drawing · dimensions in inches

Specification

ItemValue
Headfillister, drilled
Driveslot
Thread seriescoarse (UNC-2A)
MaterialCorrosion-resisting steel per Fed. Std. No. 66: AISI 302, 303, 304, 305, 316 or 384 (developed for cold heading), or UNS S30430 (formerly XM-7) to the chemical requirements of ASTM A 493; minimum ultimate tensile strength 80,000 psi.
ItemValue
FinishPassivated per QQ-P-35.
ProcurementFF-S-92
Thread specificationFED-STD-H28/2
StatusCheck the current issue before design use. Rev. B (14 Jun 1976) with Amendment 1 (18 Jun 1992). Notice 1 (20 May 1988): validated for use in acquisition. Notice 2 (27 Oct 1999): cancelled and superseded by NASM35275; the part numbers are identical (MS35275-201 = NASM35275-201).

Dimensions by size

Dimension, in2-56 UNC-2A4-40 UNC-2A6-32 UNC-2A8-32 UNC-2A10-24 UNC-2A1/4-20 UNC-2A5/16-18 UNC-2A3/8-16 UNC-2A
D body dia.0717 – .0860.0925 – .1120.1141 – .1380.1399 – .1640.1586 – .1900.2127 – .2500.2712 – .3125.3287 – .3750
A head dia.124 – .140.166 – .183.208 – .226.250 – .270.292 – .313.389 – .414.490 – .518.590 – .622
H head side height.055 – .062.072 – .079.089 – .096.106 – .113.123 – .130.161 – .170.201 – .211.242 – .253
O total head height.070 – .083.094 – .107.118 – .132.141 – .156.165 – .180.219 – .237.276 – .295.333 – .355
J slot width.023 – .031.031 – .039.039 – .048.045 – .054.050 – .060.064 – .075.072 – .084.081 – .094
T slot depth.022 – .030.030 – .038.035 – .045.054 – .065.064 – .075.087 – .102.110 – .130.134 – .154
E drill location nom.026.035.043.043.043.062.078.094
drilled hole size nom.031.037.046.046.046.062.070.070
R radius max.013.017.021.025.029.038.047.056
min tensile lbf30048073011201400254041906200

Dimensions in inches, as tabulated in Table I of the standard (letters as on its drawing).

Part numbers and lengths

Part numbers by dash number, with size, length and length tolerance. The standard governs.

2-56 UNC-2A10 part numbers · tolerance +0/-.031

Part no.Length, in
MS35275-201.125
MS35275-202.188
MS35275-203.250
MS35275-204.312
MS35275-205.375
MS35275-206.438
MS35275-207.500
MS35275-208.625
MS35275-209.750
MS35275-210.875

4-40 UNC-2A13 part numbers

Part no.Length, inTol.
MS35275-211.125+0/-.031
MS35275-212.188+0/-.031
MS35275-213.250+0/-.031
MS35275-214.312+0/-.031
MS35275-215.375+0/-.031
MS35275-216.438+0/-.031
MS35275-217.500+0/-.031
MS35275-218.625+0/-.031
MS35275-219.750+0/-.031
MS35275-220.875+0/-.031
MS35275-2211.000+0/-.031
MS35275-2221.250+0/-.062
MS35275-2231.500+0/-.062

6-32 UNC-2A15 part numbers

Part no.Length, inTol.
MS35275-224.125+0/-.031
MS35275-225.188+0/-.031
MS35275-226.250+0/-.031
MS35275-227.312+0/-.031
MS35275-228.375+0/-.031
MS35275-229.438+0/-.031
MS35275-230.500+0/-.031
MS35275-231.625+0/-.031
MS35275-232.750+0/-.031
MS35275-233.875+0/-.031
MS35275-2341.000+0/-.031
MS35275-2351.250+0/-.062
MS35275-2361.500+0/-.062
MS35275-2371.750+0/-.062
MS35275-2382.000+0/-.062

8-32 UNC-2A19 part numbers

Part no.Length, inTol.
MS35275-239.125+0/-.031
MS35275-240.188+0/-.031
MS35275-241.250+0/-.031
MS35275-242.312+0/-.031
MS35275-243.375+0/-.031
MS35275-244.438+0/-.031
MS35275-245.500+0/-.031
MS35275-246.625+0/-.031
MS35275-247.750+0/-.031
MS35275-248.875+0/-.031
MS35275-2491.000+0/-.031
MS35275-2501.250+0/-.062
MS35275-2511.500+0/-.062
MS35275-2521.750+0/-.062
MS35275-2532.000+0/-.062
MS35275-2542.250+0/-.094
MS35275-2552.500+0/-.094
MS35275-2562.750+0/-.094
MS35275-2573.000+0/-.094

10-24 UNC-2A18 part numbers

Part no.Length, inTol.
MS35275-258.188+0/-.031
MS35275-259.250+0/-.031
MS35275-260.312+0/-.031
MS35275-261.375+0/-.031
MS35275-262.438+0/-.031
MS35275-263.500+0/-.031
MS35275-264.625+0/-.031
MS35275-265.750+0/-.031
MS35275-266.875+0/-.031
MS35275-2671.000+0/-.031
MS35275-2681.250+0/-.062
MS35275-2691.500+0/-.062
MS35275-2701.750+0/-.062
MS35275-2712.000+0/-.062
MS35275-2722.250+0/-.094
MS35275-2732.500+0/-.094
MS35275-2742.750+0/-.094
MS35275-2753.000+0/-.094

1/4-20 UNC-2A16 part numbers

Part no.Length, inTol.
MS35275-276.312+0/-.031
MS35275-277.375+0/-.031
MS35275-278.438+0/-.031
MS35275-279.500+0/-.031
MS35275-280.625+0/-.031
MS35275-281.750+0/-.031
MS35275-282.875+0/-.031
MS35275-2831.000+0/-.031
MS35275-2841.250+0/-.062
MS35275-2851.500+0/-.062
MS35275-2861.750+0/-.062
MS35275-2872.000+0/-.062
MS35275-2882.250+0/-.094
MS35275-2892.500+0/-.094
MS35275-2902.750+0/-.094
MS35275-2913.000+0/-.094

5/16-18 UNC-2A15 part numbers

Part no.Length, inTol.
MS35275-292.375+0/-.031
MS35275-293.438+0/-.031
MS35275-294.500+0/-.031
MS35275-295.625+0/-.031
MS35275-296.750+0/-.031
MS35275-297.875+0/-.031
MS35275-2981.000+0/-.031
MS35275-2991.250+0/-.062
MS35275-3001.500+0/-.062
MS35275-3011.750+0/-.062
MS35275-3022.000+0/-.062
MS35275-3032.250+0/-.094
MS35275-3042.500+0/-.094
MS35275-3052.750+0/-.094
MS35275-3063.000+0/-.094

3/8-16 UNC-2A13 part numbers

Part no.Length, inTol.
MS35275-307.500+0/-.031
MS35275-308.625+0/-.031
MS35275-309.750+0/-.031
MS35275-310.875+0/-.031
MS35275-3111.000+0/-.031
MS35275-3121.250+0/-.062
MS35275-3131.500+0/-.062
MS35275-3141.750+0/-.062
MS35275-3152.000+0/-.062
MS35275-3162.250+0/-.094
MS35275-3172.500+0/-.094
MS35275-3182.750+0/-.094
MS35275-3193.000+0/-.094

Part number

How a MS35275 part number is built, segment by segment

What each code means

PartMeaning
FormatMS35275-<dash number>
ExampleMS35275-201: 2-56 UNC-2A, .125 long
Length tolerance, .125 to 1.000+0/-.031
Length tolerance, 1.250 to 2.000+0/-.062
Length tolerance, 2.250 to 3.000+0/-.094
DashDash number from Table I selects thread size and length (201 to 319)

Notes from the standard

  • Every screw has the drilled head: hole of the nominal size tabulated, at nominal location E, approximately at right angles to the slot; it may break through the bottom of the slot. All sharp edges are removed.
  • Thread length: screws 2.00 in long and shorter have complete threads to within two threads of the head, or closer if practicable; longer screws have a minimum thread length of 1.50 in.
  • Threads per FED-STD-H28/2; acceptability per FED-STD-H28/20, System 21.
  • Magnetic permeability 2.0 maximum (air = 1.0) at H = 200 oersteds, magnetic indicator per MIL-I-17214.
  • Approved data governs. Use the screw the SRM, drawing or IPC calls for.

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Calculators

CalculatorPart Number Equivalent Cross-Reference & DecoderType any MS35275 number and land on its row.CalculatorDistributor finderFind where to buy aircraft part numbers

Guides

GuideASNA fastenersHow to read ASNA blind bolt and rivet numbersChartFastener cross-referenceFrequent fastener crosses with their supersession status

How to do it

Standard practiceTorquingHow to torque aircraft bolts

Data sheets

Data sheetScrewsThe family side by side.Data sheetMS90725Screw, Cap, Hexagon Head (Finished Hexagon Bolt), Steel, Grade 5, Cadmium Plated, UNC-2AData sheetMS35306Screw, Cap, Hexagon Head (Finished Hexagon Bolt), Alloy Steel, Phosphate Finish, UNF-2A

Books

Fasteners & HardwareBookFasteners & HardwareFastener types and codes, sizes, tools and substitutes in one reference. Coming soon.

Sources

  • MS35275 Rev. B, 14 Jun 1976 — Screw, Machine — Drilled Fillister Head, Slotted, Corrosion Resisting Steel, Passivated, UNC-2A — dimensions, part numbers and notes. Public domain, distribution unlimited. Notices: 1 20 May 1988 MS35275B reviewed and determined valid for use in acquisition.; 18 Jun 1992 Amendment 1: Type UNS S30430 (formerly XM-7) added to the materials; threads per FED-STD-H28/2, acceptability per FED-STD-H28/20, System 21; references to AN500 deleted (AN500 reinstated 12 Nov 1980).; 2 27 Oct 1999 MS35275B is cancelled and superseded by NASM35275. The part identification number for MS35275B and the part number for NASM35275 are identical.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
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