Holo-Krome Silicon Bronze Hex Cap Screws

Hex Cap Screws

Holo-Krome
Alloy 651, 655 or 661 Silicon Bronze

Unified National Round Coarse/Fine

H410 — UNRC Silicon Bronze

H420 — UNRF Silicon Bronze

ASME B18.2.1 Fully Threaded

DIN933 Hex Cap Screw Full Thread HDG - Product Drawing - D1= Dia, L=Shank Length, k= head Height
Holo-Krome Critical Application Fasteners
UNRC
Diameter d 1/4-20 5/16-18 3/8-16 7/16-14 1/2-13 5/8-11 3/4-10
Diameter Code 014 016 018 020 024 026 028
S min. 0.428 0.489 0.551 0.612 0.736 0.922 1.1
max. 0.438 0.5 0.562 0.625 0.75 0.938 1.125
k min. 0.15 0.195 0.226 0.272 0.302 0.378 0.455
max. 0.163 0.211 0.243 0.291 0.323 0.403 0.483
Length Code * = Available upon request
3/8 0038 *
1/2 0050 * * * *
5/8 0063 * * * *
3/4 0075 * * * *
7/8 0088 * * *
1 0100 * * * * * *
1 1/4 0125 * * * * * *
1 1/2 0150 * * * * * * *
1 3/4 0175 * * * * *
2 0200 * * * * * * *
2 1/4 0225 * * * * *
2 1/2 0250 * * * * * * *
2 3/4 0275 * * * * *
3 0300 * * * * * *
3 1/4 0325 * * *
3 1/2 0350 * * * *
3 3/4 0375 * * * *
4 0400 * * * *
4 1/2 0450 * * * *
4 3/4 0475 * *
5 0500 * * * *
5 1/2 0550 * * *
6 0600 * * *
6 1/2 0650 *
7 0700 *
8 0800 *
8 1/2 0850 *
Order Number -> 1/4 x 2-1/2 = H410-014-0250 (Diameter Code x Length Code)
UNRF
Diameter d 5/16-24 3/8-24 1/2-20
Diameter Code 016 018 024
S min. 0.489 0.551 0.736
max. 0.5 0.562 0.75
k min. 0.195 0.226 0.302
max. 0.211 0.243 0.323
Length Code * = * = Available upon request
3/4 0075 * *
7/8 0088 *
1 1/2 0150 *
2 3/4 0275 *
3 0300 *
Order Number -> 1/2 x 3 = H420-014-0300 (Diameter Code x Length Code)

Mechanical Requirements: Wedge tensile tested in accordance with ASTM F468 to 50,000 psi minimum.

Thread Requirements: ASME B1.1, UNC & UNF, Class 2A. Thread acceptance per 6.5.1.4 of ASTM F788.

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