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AN Bolt Selection Guide

This Selection Guide is for reference purposes only and is not intended for design. Selecting appropriates fasteners for your military and aerospace requirements is the responsibility of you, the buyer.

 

AN Bolt - Size Designation AN3 AN4 AN5 AN6 AN7 AN8
Thread Dia./Pitch 3/16-32 UNF-3A 1/4-28 UNF-3A 5/16-24 UNF-3A 3/8-24 UNF-3A 7/16-20 UNF-3A 1/2-20 UNF-3A
Bolt Wrench Size 3/8" wrench size 7/16" wrench size 1/2" wrench size 9/16" wrench size 5/8" wrench size 3/4" wrench size
Corresponding Washers, Cotter Pins, Nuts
Flat Washers NAS1149F0363P
(supersedes AN960-10)

NAS1149F0332P
(supersedes AN960-10L)
NAS1149F0463P
(supersedes AN960-416)

NAS1149F0432P
(supersedes AN960-416L)
NAS1149F0563P
(supersedes AN960-516)

NAS1149F0532P
(supersedes AN960-516L)
NAS1149F0663P
(alt. AN960-616)

NAS1149F0632P
(alt. AN960-616L)
NAS1149F0763P
(alt. AN960-716)

NAS1149F0732P
(alt. AN960-716L)
NAS1149F0863P
(alt. AN960-816)

NAS1149F0832P
(alt. AN960-816L)
Wide Area Washers AN970-3
(alt. MS63040-3)
AN970-4
(alt. MS63040-4)
AN970-5
(alt. MS63040-5)
AN970-6
(alt. MS63040-6)
AN970-7
(alt. MS63040-7)
AN970-8
(alt. MS63040-8)
Cotter Pins MS24665-132 (steel)
MS24665-151 (stainless)
MS24665-132 (steel)
MS24665-151 (stainless)
MS24665-210 (steel)
MS24665-229 (stainless)
MS24665-210 (steel)
MS24665-229 (stainless)
MS24665-283 (steel)
MS24665-300 (stainless)
MS24665-285 (steel)
MS24665-302 (stainless)
Castle Nuts AN310-3 AN310-4 AN310-5 AN310-6 AN310-7 AN310-8
Plain Nuts AN315-3L
(left threaded)
AN315-3R
(right threaded)
AN315-4L
(left threaded)
AN315-4R
(right threaded)
AN315-5L
(left threaded)
AN315-5R
(right threaded)
AN315-6L
(left threaded)
AN315-6R
(right threaded)
AN315-7L
(left threaded)
AN315-7R
(right threaded)
AN315-8L
(left threaded)
AN315-8R
(right threaded)
Check Nuts AN316-3L
(left threaded)
AN316-3R
(right threaded)
AN316-4L
(left threaded)
AN316-4R
(right threaded)
AN316-5L
(left threaded)
AN316-5R
(right threaded)
AN316-6L
(left threaded)
AN316-6R
(right threaded)
AN316-7L
(left threaded)
AN316-7R
(right threaded)
AN316-8L
(left threaded)
AN316-8R
(right threaded)
Shear Nuts AN320-3 AN320-4 AN320-5 AN320-6 AN320-7 AN320-8
Castellated Locknuts MS17825-3 MS17825-4 MS17825-5 MS17825-6 MS17825-7 MS17825-8
Extended Washer Nuts MS21042-3
(stop nut)

MS21042-L3
(reduced hex, reduced height)
MS21042-4
(stop nut)

MS21042-L4
(reduced hex, reduced height)
MS21042-5
(stop nut)

MS21042-L5
(reduced hex, reduced height)
MS21042-6
(stop nut)

MS21042-L6
(reduced hex, reduced height)
MS21042-7
(stop nut)

MS21042-L7
(reduced hex, reduced height)
MS21042-8
(stop nut)

MS21042-L8
(reduced hex, reduced height)
Nylock Nuts MS21044N3
(supersedes AN365-1032A)

MS21083N3
(low height)
(supersedes AN364-1032A)
MS21044N4
(supersedes AN365-428A)

MS21083N4
(low height)
(supersedes AN364-428A)
MS21044N5
(supersedes AN365-524A)

MS21083N5
(low height)
(supersedes AN364-524A)
MS21044N6
(supersedes AN365-624A)

MS21083N6
(low height)
(supersedes AN364-624A)
MS21044N7
(supersedes AN365-720A)

MS21083N7
(low height)
(supersedes AN364-720A)
MS21044N8
(supersedes AN365-820A)

MS21083N8
(low height)
(supersedes AN364-820A)
Self-Locking Nuts MS21045-3
(supersedes AN363-1032)

MS21045L3
(dry film lube)
MS21045-4
(supersedes AN363-428)

MS21045L4
(dry film lube)
MS21045-5
(supersedes AN363-524)

MS21045L5
(dry film lube)
MS21045-6
(supersedes AN363-624)

MS21045L6
(dry film lube)
MS21045-7
(supersedes AN363-720)

MS21045L7
(dry film lube)
MS21045-8
(supersedes AN363-820)

MS21045L8
(dry film lube)
Clevis Bolts, Clevis Pins, Eyebolts - Corresponds to Washers, Cotter Pins, Nuts listed above.
Clevis Bolts
(root part number)
AN23-
(dash number
represents length)
AN24-
(dash number
represents length)
AN25-
(dash number
represents length)
AN26-
(dash number
represents length)
AN27-
(dash number
represents length)
AN28-
(dash number
represents length)
Clevis Pins
(NOT THREADED,
drilled shank)
MS20392-2
(dia. 3/16)
(supersedes AN393-)
(dash number
represents length)
MS20392-3
(dia. 1/4)
(supersedes AN394-)
(dash number
represents length)
MS20392-4
(dia. 5/16)
(supersedes AN395-)
(dash number
represents length)
MS20392-5-
(dia. 3/8)
(supersedes AN396-)
(dash number
represents length)
MS20392-6-
(dia. 7/16)
(supersedes AN397-)
(dash number
represents length)
MS20392-7-
(dia. 1/2)
(supersedes AN398-)
(dash number
represents length)
Eyebolt
(has corresponding
shank size and thread)
AN42B
(3/16 eye pin size)
(dash number
represents length)
AN43B
(3/16 eye pin size)
(dash number
represents length)
AN44
(1/4 eye pin size)
(dash number
represents length)

AN45
(5/16 eye pin size)
(dash number
represents length)
AN46-
(3/8 eye pin size)
(dash number
represents length)
AN47-
(3/8 eye pin size)
(dash number
represents length)
AN48-
(7/16 eye pin size)
(dash number
represents length)

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