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#5 Castellated Nuts
Hex Castle Nuts or Castellated Nuts have notches on one end, which resemble the serrated tops of castle parapets. These nuts are used with a bolt with cross-drilled holes, so that a cotter pin can pass through the nut and into a hole in a bolt shank, thus preventing the nut from loosening. The notched end is turned down slightly, allowing the cotter pin to be bent around the nut. Often used in machinery, shafts and automotive applications.
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| Search Results Sponsored by Perigee Manufacturing, your source for Castellated Nuts. For more results, visit perigeemfg.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Perigee | MI | Castle Nut (Hex) | Steel | Cadmium | 5/8-11 x 15/16 x 23/32 | 5/8-11 x 15/16 x 23/32 castle nut b18.2.2 | 135 |
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| Perigee | MI | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/8-18 x 1 x 23/32 | 5/8-18 x 1 x 23/32 castellated airframe nut b18.2.2 | 89 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Cadmium/Yellow | 5/16-24 | 5/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.2 | 1095 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Cadmium/Yellow | 5/16-24 | 5/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.2 | 4863 |
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| YANKEE | NH | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | 5/8-11 hex castle slotted nut 18-8 stainless steel | 5 |
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| Weaver | WA | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | 5/8-11 castle nut 18-8 ss | 20 |
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| SunPack | FL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-11 | 5/8-11 castle lock nut zinc | 10 |
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| OBRIEN | OH | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-11 | hex castle nut | 138 |
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| SRF | AL | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | castle nut s/s | - |
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| Field Fas | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-11 castle nut stl zc | 140 |
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| Kanebridge | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-11 | 5/8-11 castle nut zinc | 3.750 |
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| Liberty | IL | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | hex castle nut 18-8 s/s 18-8 s/s | 4 |
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| HBBOLT | CA | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | castle nut 18-8 | 5 |
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| Perigee | MI | Castle Nut (Hex) | Steel | Cadmium | 5/8-11 x 15/16 x 23/32 | 5/8-11 x 15/16 x 23/32 castle nut b18.2.2 | 135 |
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| Perigee | MI | Castle Nut (Hex) | 400 Stainless (405, 410,416,420,430 etc.) | Passivated | 5/8-11 x 15/16 x 23/32 | 5/8-11 x 15/16 x 23/32 hex castle nut b18.2.2 | 302 |
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| SunPack | FL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-11 | 5/8-11 castle lock nut zinc | 10 |
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| Fastener | OH | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-11 | hex castle nut 5/8-11 18.8 | 4 |
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| ACCURATE | IL | Castle Nut (Hex) | Steel | Plain | 5/8-18 slotted hex nuts plain (castle) | 250 |
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| YANKEE | NH | Castle Nut (Hex) | Steel | Plain | 5/8-18 | 5/8-18 hex castle slotted nut plain steel | 27 |
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| Weaver | WA | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 | 5/16-18 castle nut 18-8 ss | 30 |
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| Century | FL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 castle nut stl zinc (5/8-18 CASTLE NUT STL ZINC) (5/8-18 CASTLE NUT STL ZINC) | 250 |
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| SIS | AZ | Castle Nut (Hex) | Steel | Plain | 5/8-18 | 5/8-18 castle hex nut steel plain | 25 |
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| Century | FL | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/8-18 | an320-10 | 8 |
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| SRF | AL | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/8-18 | castle nut s/s | - |
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| SRF | AL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | castle nut | - |
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| Endries | WI | Castle Nut (Hex) | Steel | Plain | 5/8-18 | 5/8-18 castle nut plain | 195 |
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| Endries | WI | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 castle nut zinc | 200 |
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| NutsBolts | NE | Castle Nut (Hex) | Steel | Plain | 5/8-18 | 5/8-18 castle nut plain | 31 |
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| MidStates | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 | castle nut 18-8 | 50 |
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| Delta | TX | Castle Nut (Hex) | Steel | Zinc/Clear | 5/18-18 | fin castle nut steel zinc nf 5/18-18 (FINE THREAD) | 746 |
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| Delta | TX | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-18 | fin castle nut steel zinc 5/16-18 | 100 |
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| All Size | TX | Castle Nut (Hex) | Steel | Plain | 5/16-18 | 5/16-18 slotted castle nut plain b18.2.2 | 4,690 |
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| All Size | TX | Castle Nut (Hex) | Steel | Plain | 5/8-18 | 5/8-18 slotted castle nut b18.2.2 | 99 |
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| SRF | AL | Castle Nut (Hex) | Steel | Plain | 5/8-18 | castle nut | 10 |
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| WSB | KY | Castle Nut (Hex) | Grade 5 | Plain | 5/8-18 | nut hex castle gr5 (pl) 5/8-18 b18.2.2 | 3,260 |
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| Komar | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 hex castle nut (15/16x23/32) zinc trivalent | 45 |
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| Kanebridge | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-18 | 5/16-18 castle nut zinc | 7.500 |
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| Kanebridge | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 castle nut zinc | 3.750 |
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| Liberty | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | hex castle nut | 20 |
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| HBBOLT | CA | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | castle nut | 86 |
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| Kanebridge | IL | Castle Nut (Hex) | Grade 5 | Zinc/Clear | 5/8-18 | 5/8-18 castle nut grade 5 zinc | 3.750 |
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| Perigee | MI | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/8-18 x 1 x 23/32 | 5/8-18 x 1 x 23/32 castellated airframe nut b18.2.2 | 89 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Passivated | 5/8-18 x 1 x 5/16 | 5/8-18 x 1 x 5/16 castellated shear nut b18.2.2 | 1101 |
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| Perigee | MI | Castle Nut (Hex) | Grade A | Plain | 5/16-18 x 1/2 x 21/64 | 5/16-18 x 1/2 x 21/64 hex castle nut b18.2.2 | 48 |
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| Perigee | MI | Castle Nut (Hex) | Grade 2 | Zinc/Clear | 5/8-18 x 15/16 x 23/32 | 5/8-18 x 15/16 x 23/32 hex castle nut b18.2.2 | 402 |
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| Perigee | MI | Castle Nut (Hex) | Grade 2 | Zinc/Clear | 5/8-18 x 15/16 x 23/32 | 5/8-18 x 15/16 x 23/32 hex castle nut b18.2.2 | 129 |
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| Perigee | MI | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 x 15/16 x ? | 5/8-18 x 15/16 x ? hex castle nut b18.2.2 | 556 |
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| Hayes | CA | Castle Nut (Hex) | Brass | Plain | 5/16-18 | 5/16-18 castle nut brass | 58 |
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| Hayes | CA | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-18 | 5/16-18 castle nut 18-8ss | 42 |
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| OSSCO | RI | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 castle nut plated b18.2.2 | 85 |
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| Fastener | OH | Castle Nut (Hex) | Steel | Plain | 5/16-18 x 1.8 | castle nut 5/16-18 1.8 | 50 |
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| Komar | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 | 5/8-18 hex castle nut (15/16x23/32) zinc trivalent | 45 |
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| Rapid | NY | Castle Nut (Hex) | Steel | Plain | 5/8-18 | nut plain assembled washer MS21244-10C | 1338 |
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| Alma Bolt | MI | Castle Nut (Hex) | Grade 5 | Plain | 5/8-18 | SAE castle nut | 361 |
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| Century | NY | Castle Nut (Hex) | Steel | Zinc/Clear | 5/8-18 castle nut stl zinc 5/8-18 castle nut stl zinc | 250 |
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| CNB | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | castle nut | 1371 |
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| YANKEE | NH | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | 5/16-24 hex castle slotted nut zinc pltd | 34 |
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| Weaver | WA | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | 5/16-24 castle nut zinc | 140 |
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| METRO IND | OH | Castle Nut (Hex) | Steel | Plain | 5/16-24 | castle nut sae | 75 |
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| ACCURATE | IL | Castle Nut (Hex) | Steel | Plain | 5/16-24 | castle nuts | 63 |
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| Cascade | OR | Castle Nut (Hex) | Steel | Plain | 5/16-24 | castle s b18.2.2 | 2100 |
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| SIS | AZ | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/16-24 | castle nut low-height steel cad ii plated AN320-5 | 200 |
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| Century | FL | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Cadmium/Yellow | 5/16-24 | an310c5 nut | 9 |
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| NutsBolts | NE | Castle Nut (Hex) | Steel | Plain | 5/16-24 | 5/16-24 castle nut | 165 |
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| Delta | TX | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | fin castle nut steel zinc nf 5/16-24 (FINE THREAD) | 3084 |
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| Northern | MN | Castle Nut (Hex) | Grade 5 | Plain | 5/16-24 | s/o 5/16-24 nf gr5 castle nut plain pkg | 65 |
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| All Size | TX | Castle Nut (Hex) | Steel | Plain | 5/16-24 | 5/16-24 slotted castle nut b18.2.2 | 3,571 |
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| All Size | TX | Castle Nut (Hex) | Steel | Plain | 5/16-24 | 5/16-24 slotted castle nut plain b18.2.2 | 458 |
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| AIH | AZ | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-24 | 5/16-24 unf 3a nut s/s 304ss AN310C5 | 13 |
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| Kanebridge | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | 5/16-24 castle nut zinc | 7.500 |
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| Liberty | IL | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | hex castle nut | 1,970 |
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| HBBOLT | CA | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-24 | castle nut 18-8 | 113 |
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| ASMC | IL | Castle Nut (Hex) | Grade 5 | Zinc/Clear | 5/16-24 | fine gr5 hex castle nut med carb zp | 140 |
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| Kanebridge | IL | Castle Nut (Hex) | Grade 5 | Zinc/Clear | 5/16-24 | 5/16-24 castle nut grade 5 zinc | 7.500 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Cadmium/Yellow | 5/16-24 | 5/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.2 | 1095 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Cadmium/Yellow | 5/16-24 | 5/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.2 | 4863 |
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| Perigee | MI | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-24 | 5/16-24 x 1/2 x 3/16 hex castellated shear nut b18.2.2 | 2960 |
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| Perigee | MI | Castle Nut (Hex) | 400 Stainless (405, 410,416,420,430 etc.) | Passivated | 5/16-24 x 1/2 x 21/64 | 5/16-24 x 1/2 x 21/64 hex castle nut b18.2.2 | 298 |
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| Northern | MN | Castle Nut (Hex) | Grade 5 | Zinc/Clear | 5/16-24 | nf gr5 castle nut pkg | 48 |
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| Hayes | CA | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | 5/16-24 castle nut zinc | 75 |
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| NAPPCO | TX | Castle Nut (Hex) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16-24 | hex castle nut s/s 18-8 5/16-24 (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) | 115 |
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| OSSCO | RI | Castle Nut (Hex) | Steel | Plain | 5/16-24 | 5/16-24 castle nut b18.2.2 | 95 |
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| OSSCO | RI | Castle Nut (Hex) | Steel | Zinc/Clear | 5/16-24 | 5/16-24 castle nut plated b18.2.2 | 3 |
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| Century | NY | Castle Nut (Hex) | Steel | Cadmium/Yellow | an310-5 castle nut | 5 |
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| Century | NY | Castle Nut (Hex) | Steel | Cadmium/Yellow | an320-5 nut q2c | 5 |
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| Jackson | MS | Castle Nut (Hex) | Brass | Plain | 5/8 | nc hex castle nut | 1 |
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| THRDFAST | FL | Castle Nut (Hex) | Steel | Plain | 5/16 | nf-24 castle nut b18.2.2 | 86 |
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| Century | FL | Castle Nut (Hex) | Steel | Plain | 5 | ms14144l5 castellated nut (CASTELLATED NUT) (CASTELLATED NUT) | 6 |
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| Century | FL | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/16-24 | an310-5 castle nut | 5 |
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| Century | FL | Castle Nut (Hex) | Steel | Cadmium/Yellow | 5/16-24 | an320-5 nut q2c (NUT Q2C) (NUT Q2C) | 5 |
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| THRDFAST | AL | Castle Nut (Hex) | 316, 317, A4 Stainless | Plain | 5/8 | nf-18 t-316 ss castle nut b18.2.2 | 16 |
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