Machine screws, inch (ASME B18.6.3): pan, 82° flat, round, truss, fillister heads #0 to 1/2 — head, slot and recess sizes + envelope models — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/machine-screws-inch-asme-b18-6-3/ (sheet CC BY 4.0) Basis: ASME B18.6.3 tables as printed by GlobalFastener (pan T17, 82° flat T1), Engineers Edge (pan, recess), a maker sheet (round, ASME B18.6.3-2002), a maker sheet (truss, 2010) and Westfield / AFT (fillister); thread series from ASME B1.1 as printed by Engineering ToolBox; 54 envelope models as files Catalog version: 2026-10-20 Overall (mm): length 32.5, width 25.1, height 32.5 - Inch dimensions as printed on the ASME B18.6.3 tables: A = head diameter, H or k = head height, J or n = slot width, T or t = slot depth, max / min. Columns after the size are TPI for the coarse (UNC) and fine (UNF) series (#0 exists only as 0-80 UNF), the head dimensions, and 'other' (pan head radius R and Phillips recess diameter and width; round and truss recess diameter M, recess depth G and driver number; flat head angle). The last column is the max head diameter and height converted to mm (computed, x 25.4). - Cross-checks: GlobalFastener's ASME B18.6.3-2013 slotted pan table and Engineers Edge's ANSI B18.6.3 pan table agree on head diameter A, head height H, head radius R, slot width J and slot depth T for every size #0 to 3/4 (Engineers Edge does not label max or min, its values equal the max column); AFT's pan table agrees on the head diameter and height maxima (for example #6: 0.270 and 0.082). AFT's 82° flat table (dk .262 / .238 and k .083 for #6) agrees with GlobalFastener's ASME B18.6.3-2013 Table 1. The round table is Tanner Bolt's ASME B18.6.3-2002 sheet and the truss table a single maker sheet (2010 edition); neither was cross-checked against a second source. Older and newer editions differ slightly in places, so check the edition your drawing calls out. - Fillister heads: Westfield's UNC table and AFT's fillister table print identical numbers but both have misaligned column headers. The first pair is the head diameter A (max / min, for example #6 0.226 / 0.208) and is shown; the other pairs are shown by print position only ('printed pair 2, 3'), not named, because neither source labels them in a way that can be checked. For that reason no fillister models are drawn. The inch fillister numbers also appear in McMaster-Carr's fillister catalogue page, linked below. - The 82° flat head (ASME B18.6.3 Table 1) has a head angle of 82° max and 80° min on every size, and a published head height 'k ref'. Screws at or below a stated length (1/8 in for #0 to #3, 3/16 in for #4 to #6, and so on up to 3/4 in for 1/2) have undercut heads (GlobalFastener note). The model uses the 82° cone from A max to the nominal body diameter; its height is computed from those two numbers and is shorter than the published k ref, which is not used for the geometry. - Files are Xem-drawn envelopes at true nominal size: pan = cylinder A max x H max with the published head radius R max on the top edge; round and truss = a spherical cap through A max and H max (the real head has a short cylindrical side that no source gave as a number); flat = the 82° cone. All have the slot J max wide and T min deep, and a plain shank at the nominal diameter. No thread, no Phillips cross (only its diameter and width are published) and no point. Example lengths (0.25 in for #0 to #3, 0.5 in for #4 to #12, 0.75 in for 1/4 to 3/8, 1 in for 7/16 and 1/2) are Xem's choice. Pan: #0 to 1/2 (15), flat: #0 to 1/2 (15), round: #2 to 1/2 (12), truss: #2 to 1/2 (12). - Overlap: the older page imperial-machine-screws lists #4-40, #6-32, #8-32 and 1/4-20 (clearance and tap drills, socket head files). Socket head cap screws, inch: socket-head-cap-screws-inch-full. Thread, tap drill and clearance values: thread-reference-tap-drills-clearance. head style size TPI UNC / UNF head dia A max / min (in) head height H max / min (in) slot width J max / min (in) slot depth T max / min (in) other published values (in) head dia x height, max (mm, computed) pan (slotted / Phillips) #0 — / 80 0.116 / 0.104 0.039 / 0.031 0.023 / 0.016 0.022 / 0.014 head radius R max 0.020; Phillips recess dia 0.067, width 0.013 (Engineers Edge) 2.95 x 0.99 pan (slotted / Phillips) #1 64 / 72 0.142 / 0.130 0.046 / 0.038 0.026 / 0.019 0.027 / 0.018 head radius R max 0.025; Phillips recess dia 0.074, width 0.014 (Engineers Edge) 3.61 x 1.17 pan (slotted / Phillips) #2 56 / 64 0.167 / 0.155 0.053 / 0.045 0.031 / 0.023 0.031 / 0.022 head radius R max 0.035; Phillips recess dia 0.104, width 0.017 (Engineers Edge) 4.24 x 1.35 pan (slotted / Phillips) #3 48 / 56 0.193 / 0.180 0.060 / 0.051 0.035 / 0.027 0.036 / 0.026 head radius R max 0.037; Phillips recess dia 0.112, width 0.019 (Engineers Edge) 4.90 x 1.52 pan (slotted / Phillips) #4 40 / 48 0.219 / 0.205 0.068 / 0.058 0.039 / 0.031 0.040 / 0.030 head radius R max 0.042; Phillips recess dia 0.122, width 0.019 (Engineers Edge) 5.56 x 1.73 pan (slotted / Phillips) #5 40 / 44 0.245 / 0.231 0.075 / 0.065 0.043 / 0.035 0.045 / 0.034 head radius R max 0.044; Phillips recess dia 0.158, width 0.028 (Engineers Edge) 6.22 x 1.90 pan (slotted / Phillips) #6 32 / 40 0.270 / 0.256 0.082 / 0.072 0.048 / 0.039 0.050 / 0.037 head radius R max 0.046; Phillips recess dia 0.166, width 0.028 (Engineers Edge) 6.86 x 2.08 pan (slotted / Phillips) #8 32 / 36 0.322 / 0.306 0.096 / 0.085 0.054 / 0.045 0.058 / 0.045 head radius R max 0.052; Phillips recess dia 0.182, width 0.030 (Engineers Edge) 8.18 x 2.44 pan (slotted / Phillips) #10 24 / 32 0.373 / 0.357 0.110 / 0.099 0.060 / 0.050 0.068 / 0.053 head radius R max 0.061; Phillips recess dia 0.199, width 0.031 (Engineers Edge) 9.47 x 2.79 pan (slotted / Phillips) #12 24 / 28 0.425 / 0.407 0.125 / 0.112 0.067 / 0.056 0.077 / 0.061 head radius R max 0.078; Phillips recess dia 0.259, width 0.034 (Engineers Edge) 10.79 x 3.17 pan (slotted / Phillips) 1/4 20 / 28 0.492 / 0.473 0.144 / 0.130 0.075 / 0.064 0.087 / 0.070 head radius R max 0.087; Phillips recess dia 0.281, width 0.036 (Engineers Edge) 12.50 x 3.66 pan (slotted / Phillips) 5/16 18 / 24 0.615 / 0.594 0.178 / 0.162 0.084 / 0.072 0.106 / 0.085 head radius R max 0.099; Phillips recess dia 0.350, width 0.059 (Engineers Edge) 15.62 x 4.52 pan (slotted / Phillips) 3/8 16 / 24 0.740 / 0.716 0.212 / 0.195 0.094 / 0.081 0.124 / 0.100 head radius R max 0.143; Phillips recess dia 0.389, width 0.065 (Engineers Edge) 18.80 x 5.38 pan (slotted / Phillips) 7/16 14 / 20 0.863 / 0.837 0.247 / 0.228 0.094 / 0.081 0.142 / 0.116 head radius R max 0.153; Phillips recess dia 0.413, width 0.068 (Engineers Edge) 21.92 x 6.27 pan (slotted / Phillips) 1/2 13 / 20 0.987 / 0.958 0.281 / 0.260 0.106 / 0.091 0.161 / 0.131 head radius R max 0.175; Phillips recess dia 0.435, width 0.071 (Engineers Edge) 25.07 x 7.14 flat countersunk 82° (slotted) #0 — / 80 0.112 / 0.096 k ref 0.035 0.023 / 0.016 0.015 / 0.010 head angle 82° max / 80° min 2.84 x (cone 0.76, computed) flat countersunk 82° (slotted) #1 64 / 72 0.137 / 0.120 k ref 0.043 0.026 / 0.019 0.019 / 0.012 head angle 82° max / 80° min 3.48 x (cone 0.94, computed) flat countersunk 82° (slotted) #2 56 / 64 0.162 / 0.144 k ref 0.051 0.031 / 0.023 0.023 / 0.015 head angle 82° max / 80° min 4.11 x (cone 1.11, computed) flat countersunk 82° (slotted) #3 48 / 56 0.187 / 0.167 k ref 0.059 0.035 / 0.027 0.027 / 0.017 head angle 82° max / 80° min 4.75 x (cone 1.29, computed) flat countersunk 82° (slotted) #4 40 / 48 0.212 / 0.191 k ref 0.067 0.039 / 0.031 0.030 / 0.020 head angle 82° max / 80° min 5.38 x (cone 1.46, computed) flat countersunk 82° (slotted) #5 40 / 44 0.237 / 0.215 k ref 0.075 0.043 / 0.035 0.034 / 0.022 head angle 82° max / 80° min 6.02 x (cone 1.64, computed) flat countersunk 82° (slotted) #6 32 / 40 0.262 / 0.238 k ref 0.083 0.048 / 0.039 0.038 / 0.024 head angle 82° max / 80° min 6.65 x (cone 1.81, computed) flat countersunk 82° (slotted) #8 32 / 36 0.312 / 0.285 k ref 0.100 0.054 / 0.045 0.045 / 0.029 head angle 82° max / 80° min 7.92 x (cone 2.16, computed) flat countersunk 82° (slotted) #10 24 / 32 0.362 / 0.333 k ref 0.116 0.060 / 0.050 0.053 / 0.034 head angle 82° max / 80° min 9.19 x (cone 2.51, computed) flat countersunk 82° (slotted) #12 24 / 28 0.412 / 0.380 k ref 0.132 0.067 / 0.056 0.060 / 0.039 head angle 82° max / 80° min 10.46 x (cone 2.86, computed) flat countersunk 82° (slotted) 1/4 20 / 28 0.477 / 0.442 k ref 0.153 0.075 / 0.064 0.070 / 0.046 head angle 82° max / 80° min 12.12 x (cone 3.32, computed) flat countersunk 82° (slotted) 5/16 18 / 24 0.597 / 0.556 k ref 0.191 0.084 / 0.072 0.088 / 0.058 head angle 82° max / 80° min 15.16 x (cone 4.16, computed) flat countersunk 82° (slotted) 3/8 16 / 24 0.717 / 0.670 k ref 0.230 0.094 / 0.081 0.106 / 0.070 head angle 82° max / 80° min 18.21 x (cone 5.00, computed) flat countersunk 82° (slotted) 7/16 14 / 20 0.760 / 0.715 k ref 0.223 0.094 / 0.081 0.103 / 0.066 head angle 82° max / 80° min 19.30 x (cone 4.71, computed) flat countersunk 82° (slotted) 1/2 13 / 20 0.815 / 0.765 k ref 0.223 0.106 / 0.091 0.103 / 0.065 head angle 82° max / 80° min 20.70 x (cone 4.60, computed) round (slotted / Phillips) #2 56 / 64 0.162 / 0.146 0.069 / 0.059 0.031 / 0.023 0.048 / 0.037 Phillips recess dia M 0.100 / 0.087, depth G 0.053 / 0.017, driver No. 1 4.11 x 1.75 round (slotted / Phillips) #3 48 / 56 0.187 / 0.169 0.078 / 0.067 0.035 / 0.027 0.053 / 0.040 Phillips recess dia M 0.109 / 0.096, depth G 0.062 / 0.018, driver No. 1 4.75 x 1.98 round (slotted / Phillips) #4 40 / 48 0.211 / 0.193 0.086 / 0.075 0.039 / 0.031 0.058 / 0.044 Phillips recess dia M 0.118 / 0.105, depth G 0.072 / 0.019, driver No. 1 5.36 x 2.18 round (slotted / Phillips) #5 40 / 44 0.236 / 0.217 0.095 / 0.083 0.043 / 0.035 0.063 / 0.047 Phillips recess dia M 0.154 / 0.141, depth G 0.074 / 0.027, driver No. 2 5.99 x 2.41 round (slotted / Phillips) #6 32 / 40 0.260 / 0.240 0.103 / 0.091 0.048 / 0.039 0.068 / 0.051 Phillips recess dia M 0.162 / 0.149, depth G 0.084 / 0.027, driver No. 2 6.60 x 2.62 round (slotted / Phillips) #8 32 / 36 0.309 / 0.287 0.120 / 0.107 0.054 / 0.045 0.077 / 0.058 Phillips recess dia M 0.178 / 0.165, depth G 0.101 / 0.030, driver No. 2 7.85 x 3.05 round (slotted / Phillips) #10 24 / 32 0.359 / 0.334 0.137 / 0.123 0.060 / 0.050 0.087 / 0.065 Phillips recess dia M 0.195 / 0.182, depth G 0.119 / 0.031, driver No. 2 9.12 x 3.48 round (slotted / Phillips) #12 24 / 28 0.408 / 0.382 0.153 / 0.139 0.067 / 0.056 0.096 / 0.073 Phillips recess dia M 0.249 / 0.236, depth G 0.125 / 0.032, driver No. 3 10.36 x 3.89 round (slotted / Phillips) 1/4 20 / 28 0.472 / 0.443 0.175 / 0.160 0.075 / 0.064 0.109 / 0.082 Phillips recess dia M 0.268 / 0.255, depth G 0.147 / 0.034, driver No. 3 11.99 x 4.44 round (slotted / Phillips) 5/16 18 / 24 0.590 / 0.557 0.216 / 0.198 0.084 / 0.072 0.132 / 0.099 Phillips recess dia M 0.308 / 0.295, depth G 0.187 / 0.040, driver No. 3 14.99 x 5.49 round (slotted / Phillips) 3/8 16 / 24 0.708 / 0.670 0.256 / 0.237 0.094 / 0.081 0.155 / 0.117 Phillips recess dia M 0.387 / 0.374, depth G 0.228 / 0.064, driver No. 4 17.98 x 6.50 round (slotted / Phillips) 1/2 13 / 20 0.813 / 0.766 0.355 / 0.332 0.106 / 0.091 0.211 / 0.159 Phillips recess dia M 0.416 / 0.403, depth G 0.256 / 0.068, driver No. 4 20.65 x 9.02 truss (slotted / Phillips) #2 56 / 64 0.194 / 0.180 0.053 / 0.044 0.031 / 0.023 0.031 / 0.022 Phillips recess dia M ref 0.097, penetration G 0.052 / 0.034, driver No. 1 4.93 x 1.35 truss (slotted / Phillips) #3 48 / 56 0.226 / 0.211 0.061 / 0.051 0.035 / 0.027 0.036 / 0.026 Phillips recess dia M ref 0.103, penetration G 0.059 / 0.042, driver No. 1 5.74 x 1.55 truss (slotted / Phillips) #4 40 / 48 0.257 / 0.241 0.069 / 0.059 0.039 / 0.031 0.040 / 0.030 Phillips recess dia M ref 0.105, penetration G 0.062 / 0.044, driver No. 1 6.53 x 1.75 truss (slotted / Phillips) #5 40 / 44 0.289 / 0.272 0.078 / 0.066 0.043 / 0.035 0.045 / 0.034 Phillips recess dia M ref 0.121, penetration G 0.078 / 0.060, driver No. 1 7.34 x 1.98 truss (slotted / Phillips) #6 32 / 40 0.321 / 0.303 0.086 / 0.074 0.048 / 0.039 0.050 / 0.037 Phillips recess dia M ref 0.151, penetration G 0.073 / 0.048, driver No. 2 8.15 x 2.18 truss (slotted / Phillips) #8 32 / 36 0.384 / 0.364 0.102 / 0.088 0.054 / 0.045 0.058 / 0.045 Phillips recess dia M ref 0.166, penetration G 0.088 / 0.063, driver No. 2 9.75 x 2.59 truss (slotted / Phillips) #10 24 / 32 0.448 / 0.425 0.118 / 0.103 0.060 / 0.050 0.068 / 0.053 Phillips recess dia M ref 0.181, penetration G 0.104 / 0.079, driver No. 2 11.38 x 3.00 truss (slotted / Phillips) #12 24 / 28 0.511 / 0.487 0.134 / 0.118 0.067 / 0.056 0.077 / 0.061 Phillips recess dia M ref 0.241, penetration G 0.111 / 0.086, driver No. 3 12.98 x 3.40 truss (slotted / Phillips) 1/4 20 / 28 0.573 / 0.546 0.150 / 0.133 0.075 / 0.064 0.087 / 0.070 Phillips recess dia M ref 0.256, penetration G 0.126 / 0.101, driver No. 3 14.55 x 3.81 truss (slotted / Phillips) 5/16 18 / 24 0.698 / 0.666 0.183 / 0.162 0.084 / 0.072 0.106 / 0.085 Phillips recess dia M ref 0.345, penetration G 0.173 / 0.148, driver No. 4 17.73 x 4.65 truss (slotted / Phillips) 3/8 16 / 24 0.823 / 0.787 0.215 / 0.191 0.094 / 0.081 0.124 / 0.100 Phillips recess dia M ref 0.376, penetration G 0.206 / 0.182, driver No. 4 20.90 x 5.46 truss (slotted / Phillips) 1/2 13 / 20 1.073 / 1.028 0.280 / 0.250 0.106 / 0.091 0.161 / 0.131 Phillips recess dia M ref 0.437, penetration G 0.268 / 0.243, driver No. 4 27.25 x 7.11 fillister (slotted) — numbers only #1 64 / 72 0.118 / 0.104 printed pair 2: 0.053 / 0.045 printed pair 3: 0.066 / 0.058 printed cols 4 and 5: 0.026 / 0.019 ; 0.031 / 0.020 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #2 56 / 64 0.140 / 0.124 printed pair 2: 0.062 / 0.053 printed pair 3: 0.083 / 0.066 printed cols 4 and 5: 0.031 / 0.023 ; 0.037 / 0.025 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #3 48 / 56 0.161 / 0.145 printed pair 2: 0.070 / 0.061 printed pair 3: 0.095 / 0.077 printed cols 4 and 5: 0.035 / 0.027 ; 0.043 / 0.030 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #4 40 / 48 0.183 / 0.166 printed pair 2: 0.079 / 0.069 printed pair 3: 0.107 / 0.088 printed cols 4 and 5: 0.039 / 0.031 ; 0.048 / 0.035 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #5 40 / 44 0.205 / 0.187 printed pair 2: 0.088 / 0.078 printed pair 3: 0.120 / 0.100 printed cols 4 and 5: 0.043 / 0.035 ; 0.054 / 0.040 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #6 32 / 40 0.226 / 0.208 printed pair 2: 0.096 / 0.086 printed pair 3: 0.132 / 0.111 printed cols 4 and 5: 0.048 / 0.039 ; 0.060 / 0.045 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #8 32 / 36 0.270 / 0.250 printed pair 2: 0.113 / 0.102 printed pair 3: 0.156 / 0.133 printed cols 4 and 5: 0.054 / 0.045 ; 0.071 / 0.054 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #10 24 / 32 0.313 / 0.292 printed pair 2: 0.130 / 0.118 printed pair 3: 0.180 / 0.156 printed cols 4 and 5: 0.060 / 0.050 ; 0.083 / 0.064 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only #12 24 / 28 0.357 / 0.334 printed pair 2: 0.148 / 0.134 printed pair 3: 0.205 / 0.178 printed cols 4 and 5: 0.067 / 0.056 ; 0.094 / 0.074 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only 1/4 20 / 28 0.414 / 0.389 printed pair 2: 0.170 / 0.155 printed pair 3: 0.237 / 0.207 printed cols 4 and 5: 0.075 / 0.064 ; 0.109 / 0.087 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only 5/16 18 / 24 0.518 / 0.490 printed pair 2: 0.211 / 0.194 printed pair 3: 0.295 / 0.262 printed cols 4 and 5: 0.084 / 0.072 ; 0.137 / 0.110 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only 3/8 16 / 24 0.622 / 0.590 printed pair 2: 0.253 / 0.233 printed pair 3: 0.355 / 0.315 printed cols 4 and 5: 0.094 / 0.081 ; 0.164 / 0.133 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only 7/16 14 / 20 0.625 / 0.589 printed pair 2: 0.265 / 0.242 printed pair 3: 0.368 / 0.321 printed cols 4 and 5: 0.094 / 0.081 ; 0.170 / 0.135 column labels misaligned in both sources (see notes) — fillister (slotted) — numbers only 1/2 13 / 20 0.750 / 0.710 printed pair 2: 0.297 / 0.273 printed pair 3: 0.412 / 0.362 printed cols 4 and 5: 0.106 / 0.091 ; 0.190 / 0.151 column labels misaligned in both sources (see notes) — Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - GlobalFastener (standards database): ASME B 18.6.3 (T17) - 2013 slotted pan head screws, Table 17: d, P, dk max / min, k max / min, n, t, R max — web — Publisher's page; dimensions are facts — https://www.globalfastener.com/standards/detail_4988.html - Engineers Edge: ANSI B18.6.3 slotted pan head machine screws: head diameter A, head height H, head radius R, slot width J, slot depth T, #0000 to 3/4 — web — Publisher's page; dimensions are facts — https://ns1.engineersedge.com/pan_head1.htm - Engineers Edge: Cross-recessed head data page (titled fillister; its head diameter, height and radius equal the pan head table): recess diameter and recess width, #0 to 3/4 — web — Publisher's page; dimensions are facts — https://ns2.engineersedge.com/phillips_pan_head.htm - AFT Fasteners: Pan head machine screws, slotted and Phillips: head diameter and height by size (cross-check; the page's column headers are not labelled) — web — Publisher's page; dimensions are facts — https://www.aftfasteners.com/pan-head-machine-screws-dimensions-specifications/ - GlobalFastener (standards database): ASME B 18.6.3 (T1) - 2013 82-degree slotted flat countersunk head machine screws, Table 1: d, P, dk max / min, k ref, n, t, head angle 82 / 80 degrees — web — Publisher's page; dimensions are facts — https://www.globalfastener.com/standards/detail_4972.html - AFT Fasteners: 82 degree flat head machine screws dimensions (cross-check of dk max / min, k ref, n, t; headers not labelled) — web — Publisher's page; dimensions are facts — https://www.aftfasteners.com/82-degree-flat-head-machine-screws-dimensions-specifications/ - Tanner Bolt (maker sheet): Round heads for machine screws (ASME B18.6.3-2002): A, H, J, T, M, G by size 2 to 1/2 — web — Publisher's page; dimensions are facts — https://www.tannerbolt.com/media/akeneo_connector/Machineroundmpbhds.pdf - Cold-forged fastener maker sheet (hosted on a Shopify CDN, maker not named in the text read): Truss heads for machine screws (ASME B18.6.3-2010): A, H, J, T, M, G by size 2 to 1/2 — web — Publisher's page; dimensions are facts — https://cdn2.shopify.com/s/files/1/0056/7856/3437/files/Machinebindtrusshds.pdf - Westfield Fasteners: ASME B18.6.3 UNC slotted fillister head machine screws, 1-64 to 3/4-10 (column headers misaligned on the page; values read by position) — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/ScrewBolt-SlotFillister-UNCoarse.html - AFT Fasteners: Fillister head machine screws, slotted and Phillips (ASME B18.6.3-2013): same figures as Westfield, headers garbled — web — Publisher's page; dimensions are facts — https://www.aftfasteners.com/fillister-head-machine-screws-specifications-dimensions/ - Engineering ToolBox: ANSI/ASME B1.1 Unified National threads, UNC and UNF: TPI, major diameter in / mm, tap drill mm, pitch mm, #0 to 4 in — web — Publisher's page; dimensions are facts — https://www.engineeringtoolbox.com/unified-screw-threads-unc-unf-d_1809.html - McMaster-Carr: Machine screws (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/screws/machine-screws/ - McMaster-Carr: Fillister head machine screws (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/fillister-head-machine-screws - McMaster-Carr: Binding head machine screws (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/binding-head-machine-screws Free files (CC BY 4.0, Xem Studio; STEP + STL, 54 parts): https://xemstudio.com/files/hardware/machine-screws-inch-asme-b18-6-3/index.json API: https://xemstudio.com/api/geometry?object=machine-screws-inch-asme-b18-6-3